PostgreSQL Source Code  git master
pgstat.c File Reference
#include "postgres.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <signal.h>
#include "pgstat.h"
#include "access/heapam.h"
#include "access/htup_details.h"
#include "access/tableam.h"
#include "access/transam.h"
#include "access/twophase_rmgr.h"
#include "access/xact.h"
#include "catalog/pg_database.h"
#include "catalog/pg_proc.h"
#include "common/ip.h"
#include "libpq/libpq.h"
#include "libpq/pqsignal.h"
#include "mb/pg_wchar.h"
#include "miscadmin.h"
#include "pg_trace.h"
#include "postmaster/autovacuum.h"
#include "postmaster/fork_process.h"
#include "postmaster/postmaster.h"
#include "replication/walsender.h"
#include "storage/backendid.h"
#include "storage/dsm.h"
#include "storage/fd.h"
#include "storage/ipc.h"
#include "storage/latch.h"
#include "storage/lmgr.h"
#include "storage/pg_shmem.h"
#include "storage/procsignal.h"
#include "storage/sinvaladt.h"
#include "utils/ascii.h"
#include "utils/guc.h"
#include "utils/memutils.h"
#include "utils/ps_status.h"
#include "utils/rel.h"
#include "utils/snapmgr.h"
#include "utils/timestamp.h"
Include dependency graph for pgstat.c:

Go to the source code of this file.

Data Structures

struct  TabStatusArray
 
struct  TabStatHashEntry
 
struct  PgStat_SubXactStatus
 
struct  TwoPhasePgStatRecord
 

Macros

#define PGSTAT_STAT_INTERVAL
 
#define PGSTAT_RETRY_DELAY
 
#define PGSTAT_MAX_WAIT_TIME
 
#define PGSTAT_INQ_INTERVAL
 
#define PGSTAT_RESTART_INTERVAL
 
#define PGSTAT_POLL_LOOP_COUNT   (PGSTAT_MAX_WAIT_TIME / PGSTAT_RETRY_DELAY)
 
#define PGSTAT_INQ_LOOP_COUNT   (PGSTAT_INQ_INTERVAL / PGSTAT_RETRY_DELAY)
 
#define PGSTAT_MIN_RCVBUF   (100 * 1024)
 
#define PGSTAT_DB_HASH_SIZE   16
 
#define PGSTAT_TAB_HASH_SIZE   512
 
#define PGSTAT_FUNCTION_HASH_SIZE   512
 
#define NumBackendStatSlots   (MaxBackends + NUM_AUXPROCTYPES)
 
#define TABSTAT_QUANTUM   100 /* we alloc this many at a time */
 
#define TESTBYTEVAL   ((char) 199)
 

Typedefs

typedef struct TabStatusArray TabStatusArray
 
typedef struct TabStatHashEntry TabStatHashEntry
 
typedef struct PgStat_SubXactStatus PgStat_SubXactStatus
 
typedef struct TwoPhasePgStatRecord TwoPhasePgStatRecord
 

Functions

NON_EXEC_STATIC void PgstatCollectorMain (int argc, char *argv[]) pg_attribute_noreturn()
 
static void pgstat_exit (SIGNAL_ARGS)
 
static void pgstat_beshutdown_hook (int code, Datum arg)
 
static void pgstat_sighup_handler (SIGNAL_ARGS)
 
static PgStat_StatDBEntrypgstat_get_db_entry (Oid databaseid, bool create)
 
static PgStat_StatTabEntrypgstat_get_tab_entry (PgStat_StatDBEntry *dbentry, Oid tableoid, bool create)
 
static void pgstat_write_statsfiles (bool permanent, bool allDbs)
 
static void pgstat_write_db_statsfile (PgStat_StatDBEntry *dbentry, bool permanent)
 
static HTABpgstat_read_statsfiles (Oid onlydb, bool permanent, bool deep)
 
static void pgstat_read_db_statsfile (Oid databaseid, HTAB *tabhash, HTAB *funchash, bool permanent)
 
static void backend_read_statsfile (void)
 
static void pgstat_read_current_status (void)
 
static bool pgstat_write_statsfile_needed (void)
 
static bool pgstat_db_requested (Oid databaseid)
 
static void pgstat_send_tabstat (PgStat_MsgTabstat *tsmsg)
 
static void pgstat_send_funcstats (void)
 
static HTABpgstat_collect_oids (Oid catalogid, AttrNumber anum_oid)
 
static PgStat_TableStatusget_tabstat_entry (Oid rel_id, bool isshared)
 
static void pgstat_setup_memcxt (void)
 
static const char * pgstat_get_wait_activity (WaitEventActivity w)
 
static const char * pgstat_get_wait_client (WaitEventClient w)
 
static const char * pgstat_get_wait_ipc (WaitEventIPC w)
 
static const char * pgstat_get_wait_timeout (WaitEventTimeout w)
 
static const char * pgstat_get_wait_io (WaitEventIO w)
 
static void pgstat_setheader (PgStat_MsgHdr *hdr, StatMsgType mtype)
 
static void pgstat_send (void *msg, int len)
 
static void pgstat_recv_inquiry (PgStat_MsgInquiry *msg, int len)
 
static void pgstat_recv_tabstat (PgStat_MsgTabstat *msg, int len)
 
static void pgstat_recv_tabpurge (PgStat_MsgTabpurge *msg, int len)
 
static void pgstat_recv_dropdb (PgStat_MsgDropdb *msg, int len)
 
static void pgstat_recv_resetcounter (PgStat_MsgResetcounter *msg, int len)
 
static void pgstat_recv_resetsharedcounter (PgStat_MsgResetsharedcounter *msg, int len)
 
static void pgstat_recv_resetsinglecounter (PgStat_MsgResetsinglecounter *msg, int len)
 
static void pgstat_recv_autovac (PgStat_MsgAutovacStart *msg, int len)
 
static void pgstat_recv_vacuum (PgStat_MsgVacuum *msg, int len)
 
static void pgstat_recv_analyze (PgStat_MsgAnalyze *msg, int len)
 
static void pgstat_recv_archiver (PgStat_MsgArchiver *msg, int len)
 
static void pgstat_recv_bgwriter (PgStat_MsgBgWriter *msg, int len)
 
static void pgstat_recv_funcstat (PgStat_MsgFuncstat *msg, int len)
 
static void pgstat_recv_funcpurge (PgStat_MsgFuncpurge *msg, int len)
 
static void pgstat_recv_recoveryconflict (PgStat_MsgRecoveryConflict *msg, int len)
 
static void pgstat_recv_deadlock (PgStat_MsgDeadlock *msg, int len)
 
static void pgstat_recv_checksum_failure (PgStat_MsgChecksumFailure *msg, int len)
 
static void pgstat_recv_tempfile (PgStat_MsgTempFile *msg, int len)
 
void pgstat_init (void)
 
static void pgstat_reset_remove_files (const char *directory)
 
void pgstat_reset_all (void)
 
int pgstat_start (void)
 
void allow_immediate_pgstat_restart (void)
 
void pgstat_report_stat (bool force)
 
void pgstat_vacuum_stat (void)
 
void pgstat_drop_database (Oid databaseid)
 
void pgstat_reset_counters (void)
 
void pgstat_reset_shared_counters (const char *target)
 
void pgstat_reset_single_counter (Oid objoid, PgStat_Single_Reset_Type type)
 
void pgstat_report_autovac (Oid dboid)
 
void pgstat_report_vacuum (Oid tableoid, bool shared, PgStat_Counter livetuples, PgStat_Counter deadtuples)
 
void pgstat_report_analyze (Relation rel, PgStat_Counter livetuples, PgStat_Counter deadtuples, bool resetcounter)
 
void pgstat_report_recovery_conflict (int reason)
 
void pgstat_report_deadlock (void)
 
void pgstat_report_checksum_failures_in_db (Oid dboid, int failurecount)
 
void pgstat_report_checksum_failure (void)
 
void pgstat_report_tempfile (size_t filesize)
 
void pgstat_ping (void)
 
static void pgstat_send_inquiry (TimestampTz clock_time, TimestampTz cutoff_time, Oid databaseid)
 
void pgstat_init_function_usage (FunctionCallInfo fcinfo, PgStat_FunctionCallUsage *fcu)
 
PgStat_BackendFunctionEntryfind_funcstat_entry (Oid func_id)
 
void pgstat_end_function_usage (PgStat_FunctionCallUsage *fcu, bool finalize)
 
void pgstat_initstats (Relation rel)
 
PgStat_TableStatusfind_tabstat_entry (Oid rel_id)
 
static PgStat_SubXactStatusget_tabstat_stack_level (int nest_level)
 
static void add_tabstat_xact_level (PgStat_TableStatus *pgstat_info, int nest_level)
 
void pgstat_count_heap_insert (Relation rel, PgStat_Counter n)
 
void pgstat_count_heap_update (Relation rel, bool hot)
 
void pgstat_count_heap_delete (Relation rel)
 
static void pgstat_truncate_save_counters (PgStat_TableXactStatus *trans)
 
static void pgstat_truncate_restore_counters (PgStat_TableXactStatus *trans)
 
void pgstat_count_truncate (Relation rel)
 
void pgstat_update_heap_dead_tuples (Relation rel, int delta)
 
void AtEOXact_PgStat (bool isCommit, bool parallel)
 
void AtEOSubXact_PgStat (bool isCommit, int nestDepth)
 
void AtPrepare_PgStat (void)
 
void PostPrepare_PgStat (void)
 
void pgstat_twophase_postcommit (TransactionId xid, uint16 info, void *recdata, uint32 len)
 
void pgstat_twophase_postabort (TransactionId xid, uint16 info, void *recdata, uint32 len)
 
PgStat_StatDBEntrypgstat_fetch_stat_dbentry (Oid dbid)
 
PgStat_StatTabEntrypgstat_fetch_stat_tabentry (Oid relid)
 
PgStat_StatFuncEntrypgstat_fetch_stat_funcentry (Oid func_id)
 
PgBackendStatuspgstat_fetch_stat_beentry (int beid)
 
LocalPgBackendStatuspgstat_fetch_stat_local_beentry (int beid)
 
int pgstat_fetch_stat_numbackends (void)
 
PgStat_ArchiverStatspgstat_fetch_stat_archiver (void)
 
PgStat_GlobalStatspgstat_fetch_global (void)
 
Size BackendStatusShmemSize (void)
 
void CreateSharedBackendStatus (void)
 
void pgstat_initialize (void)
 
void pgstat_bestart (void)
 
void pgstat_report_activity (BackendState state, const char *cmd_str)
 
void pgstat_progress_start_command (ProgressCommandType cmdtype, Oid relid)
 
void pgstat_progress_update_param (int index, int64 val)
 
void pgstat_progress_update_multi_param (int nparam, const int *index, const int64 *val)
 
void pgstat_progress_end_command (void)
 
void pgstat_report_appname (const char *appname)
 
void pgstat_report_xact_timestamp (TimestampTz tstamp)
 
const char * pgstat_get_wait_event_type (uint32 wait_event_info)
 
const char * pgstat_get_wait_event (uint32 wait_event_info)
 
const char * pgstat_get_backend_current_activity (int pid, bool checkUser)
 
const char * pgstat_get_crashed_backend_activity (int pid, char *buffer, int buflen)
 
const char * pgstat_get_backend_desc (BackendType backendType)
 
void pgstat_send_archiver (const char *xlog, bool failed)
 
void pgstat_send_bgwriter (void)
 
static void reset_dbentry_counters (PgStat_StatDBEntry *dbentry)
 
static void get_dbstat_filename (bool permanent, bool tempname, Oid databaseid, char *filename, int len)
 
static bool pgstat_read_db_statsfile_timestamp (Oid databaseid, bool permanent, TimestampTz *ts)
 
void pgstat_clear_snapshot (void)
 
char * pgstat_clip_activity (const char *raw_activity)
 

Variables

bool pgstat_track_activities = false
 
bool pgstat_track_counts = false
 
int pgstat_track_functions = TRACK_FUNC_OFF
 
int pgstat_track_activity_query_size = 1024
 
char * pgstat_stat_directory = NULL
 
char * pgstat_stat_filename = NULL
 
char * pgstat_stat_tmpname = NULL
 
PgStat_MsgBgWriter BgWriterStats
 
NON_EXEC_STATIC pgsocket pgStatSock = PGINVALID_SOCKET
 
static struct sockaddr_storage pgStatAddr
 
static time_t last_pgstat_start_time
 
static bool pgStatRunningInCollector = false
 
static TabStatusArraypgStatTabList = NULL
 
static HTABpgStatTabHash = NULL
 
static HTABpgStatFunctions = NULL
 
static bool have_function_stats = false
 
static PgStat_SubXactStatuspgStatXactStack = NULL
 
static int pgStatXactCommit = 0
 
static int pgStatXactRollback = 0
 
PgStat_Counter pgStatBlockReadTime = 0
 
PgStat_Counter pgStatBlockWriteTime = 0
 
static MemoryContext pgStatLocalContext = NULL
 
static HTABpgStatDBHash = NULL
 
static LocalPgBackendStatuslocalBackendStatusTable = NULL
 
static int localNumBackends = 0
 
static PgStat_ArchiverStats archiverStats
 
static PgStat_GlobalStats globalStats
 
static Listpending_write_requests = NIL
 
static volatile bool need_exit = false
 
static volatile bool got_SIGHUP = false
 
static instr_time total_func_time
 
static PgBackendStatusBackendStatusArray = NULL
 
static PgBackendStatusMyBEEntry = NULL
 
static char * BackendAppnameBuffer = NULL
 
static char * BackendClientHostnameBuffer = NULL
 
static char * BackendActivityBuffer = NULL
 
static Size BackendActivityBufferSize = 0
 

Macro Definition Documentation

◆ NumBackendStatSlots

#define NumBackendStatSlots   (MaxBackends + NUM_AUXPROCTYPES)

◆ PGSTAT_DB_HASH_SIZE

#define PGSTAT_DB_HASH_SIZE   16

Definition at line 104 of file pgstat.c.

Referenced by pgstat_read_statsfiles().

◆ PGSTAT_FUNCTION_HASH_SIZE

#define PGSTAT_FUNCTION_HASH_SIZE   512

◆ PGSTAT_INQ_INTERVAL

#define PGSTAT_INQ_INTERVAL
Value:
640 /* How often to ping the collector for a
* new file; in milliseconds. */

Definition at line 86 of file pgstat.c.

◆ PGSTAT_INQ_LOOP_COUNT

#define PGSTAT_INQ_LOOP_COUNT   (PGSTAT_INQ_INTERVAL / PGSTAT_RETRY_DELAY)

Definition at line 94 of file pgstat.c.

Referenced by backend_read_statsfile().

◆ PGSTAT_MAX_WAIT_TIME

#define PGSTAT_MAX_WAIT_TIME
Value:
10000 /* Maximum time to wait for a stats
* file update; in milliseconds. */

Definition at line 83 of file pgstat.c.

◆ PGSTAT_MIN_RCVBUF

#define PGSTAT_MIN_RCVBUF   (100 * 1024)

Definition at line 97 of file pgstat.c.

Referenced by pgstat_init().

◆ PGSTAT_POLL_LOOP_COUNT

#define PGSTAT_POLL_LOOP_COUNT   (PGSTAT_MAX_WAIT_TIME / PGSTAT_RETRY_DELAY)

Definition at line 93 of file pgstat.c.

Referenced by backend_read_statsfile().

◆ PGSTAT_RESTART_INTERVAL

#define PGSTAT_RESTART_INTERVAL
Value:
60 /* How often to attempt to restart a
* failed statistics collector; in
* seconds. */

Definition at line 89 of file pgstat.c.

Referenced by pgstat_start().

◆ PGSTAT_RETRY_DELAY

#define PGSTAT_RETRY_DELAY
Value:
10 /* How long to wait between checks for a
* new file; in milliseconds. */

Definition at line 80 of file pgstat.c.

Referenced by backend_read_statsfile().

◆ PGSTAT_STAT_INTERVAL

#define PGSTAT_STAT_INTERVAL
Value:
500 /* Minimum time between stats file
* updates; in milliseconds. */

Definition at line 77 of file pgstat.c.

Referenced by backend_read_statsfile(), and pgstat_report_stat().

◆ PGSTAT_TAB_HASH_SIZE

#define PGSTAT_TAB_HASH_SIZE   512

Definition at line 105 of file pgstat.c.

Referenced by pgstat_collect_oids(), pgstat_read_statsfiles(), and reset_dbentry_counters().

◆ TABSTAT_QUANTUM

#define TABSTAT_QUANTUM   100 /* we alloc this many at a time */

Definition at line 168 of file pgstat.c.

Referenced by get_tabstat_entry().

◆ TESTBYTEVAL

#define TESTBYTEVAL   ((char) 199)

Referenced by pgstat_init().

Typedef Documentation

◆ PgStat_SubXactStatus

◆ TabStatHashEntry

◆ TabStatusArray

◆ TwoPhasePgStatRecord

Function Documentation

◆ add_tabstat_xact_level()

static void add_tabstat_xact_level ( PgStat_TableStatus pgstat_info,
int  nest_level 
)
static

Definition at line 1921 of file pgstat.c.

References PgStat_SubXactStatus::first, get_tabstat_stack_level(), MemoryContextAllocZero(), PgStat_TableXactStatus::nest_level, PgStat_TableXactStatus::next, PgStat_TableXactStatus::parent, TopTransactionContext, PgStat_TableStatus::trans, trans, and PgStat_TableXactStatus::upper.

Referenced by pgstat_count_heap_delete(), pgstat_count_heap_insert(), pgstat_count_heap_update(), and pgstat_count_truncate().

1922 {
1923  PgStat_SubXactStatus *xact_state;
1925 
1926  /*
1927  * If this is the first rel to be modified at the current nest level, we
1928  * first have to push a transaction stack entry.
1929  */
1930  xact_state = get_tabstat_stack_level(nest_level);
1931 
1932  /* Now make a per-table stack entry */
1933  trans = (PgStat_TableXactStatus *)
1935  sizeof(PgStat_TableXactStatus));
1936  trans->nest_level = nest_level;
1937  trans->upper = pgstat_info->trans;
1938  trans->parent = pgstat_info;
1939  trans->next = xact_state->first;
1940  xact_state->first = trans;
1941  pgstat_info->trans = trans;
1942 }
MemoryContext TopTransactionContext
Definition: mcxt.c:49
struct PgStat_TableXactStatus * next
Definition: pgstat.h:179
static PgStat_SubXactStatus * get_tabstat_stack_level(int nest_level)
Definition: pgstat.c:1899
struct PgStat_TableXactStatus * upper
Definition: pgstat.h:176
void * MemoryContextAllocZero(MemoryContext context, Size size)
Definition: mcxt.c:814
struct PgStat_TableXactStatus * trans
Definition: pgstat.h:157
static zic_t trans[TZ_MAX_LEAPS]
Definition: zic.c:396
PgStat_TableXactStatus * first
Definition: pgstat.c:216
PgStat_TableStatus * parent
Definition: pgstat.h:177

◆ allow_immediate_pgstat_restart()

void allow_immediate_pgstat_restart ( void  )

Definition at line 791 of file pgstat.c.

References last_pgstat_start_time.

Referenced by HandleChildCrash().

792 {
794 }
static time_t last_pgstat_start_time
Definition: pgstat.c:153

◆ AtEOSubXact_PgStat()

void AtEOSubXact_PgStat ( bool  isCommit,
int  nestDepth 
)

Definition at line 2181 of file pgstat.c.

References Assert, PgStat_SubXactStatus::first, get_tabstat_stack_level(), PgStat_TableXactStatus::nest_level, PgStat_SubXactStatus::nest_level, PgStat_TableXactStatus::next, PgStat_TableXactStatus::parent, pfree(), pgstat_truncate_restore_counters(), pgstat_truncate_save_counters(), pgStatXactStack, PgStat_SubXactStatus::prev, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_delta_dead_tuples, PgStat_TableCounts::t_tuples_deleted, PgStat_TableCounts::t_tuples_inserted, PgStat_TableCounts::t_tuples_updated, PgStat_TableStatus::trans, trans, PgStat_TableXactStatus::truncated, PgStat_TableXactStatus::tuples_deleted, PgStat_TableXactStatus::tuples_inserted, PgStat_TableXactStatus::tuples_updated, and PgStat_TableXactStatus::upper.

Referenced by AbortSubTransaction(), and CommitSubTransaction().

2182 {
2183  PgStat_SubXactStatus *xact_state;
2184 
2185  /*
2186  * Transfer transactional insert/update counts into the next higher
2187  * subtransaction state.
2188  */
2189  xact_state = pgStatXactStack;
2190  if (xact_state != NULL &&
2191  xact_state->nest_level >= nestDepth)
2192  {
2194  PgStat_TableXactStatus *next_trans;
2195 
2196  /* delink xact_state from stack immediately to simplify reuse case */
2197  pgStatXactStack = xact_state->prev;
2198 
2199  for (trans = xact_state->first; trans != NULL; trans = next_trans)
2200  {
2201  PgStat_TableStatus *tabstat;
2202 
2203  next_trans = trans->next;
2204  Assert(trans->nest_level == nestDepth);
2205  tabstat = trans->parent;
2206  Assert(tabstat->trans == trans);
2207  if (isCommit)
2208  {
2209  if (trans->upper && trans->upper->nest_level == nestDepth - 1)
2210  {
2211  if (trans->truncated)
2212  {
2213  /* propagate the truncate status one level up */
2215  /* replace upper xact stats with ours */
2216  trans->upper->tuples_inserted = trans->tuples_inserted;
2217  trans->upper->tuples_updated = trans->tuples_updated;
2218  trans->upper->tuples_deleted = trans->tuples_deleted;
2219  }
2220  else
2221  {
2222  trans->upper->tuples_inserted += trans->tuples_inserted;
2223  trans->upper->tuples_updated += trans->tuples_updated;
2224  trans->upper->tuples_deleted += trans->tuples_deleted;
2225  }
2226  tabstat->trans = trans->upper;
2227  pfree(trans);
2228  }
2229  else
2230  {
2231  /*
2232  * When there isn't an immediate parent state, we can just
2233  * reuse the record instead of going through a
2234  * palloc/pfree pushup (this works since it's all in
2235  * TopTransactionContext anyway). We have to re-link it
2236  * into the parent level, though, and that might mean
2237  * pushing a new entry into the pgStatXactStack.
2238  */
2239  PgStat_SubXactStatus *upper_xact_state;
2240 
2241  upper_xact_state = get_tabstat_stack_level(nestDepth - 1);
2242  trans->next = upper_xact_state->first;
2243  upper_xact_state->first = trans;
2244  trans->nest_level = nestDepth - 1;
2245  }
2246  }
2247  else
2248  {
2249  /*
2250  * On abort, update top-level tabstat counts, then forget the
2251  * subtransaction
2252  */
2253 
2254  /* first restore values obliterated by truncate */
2256  /* count attempted actions regardless of commit/abort */
2257  tabstat->t_counts.t_tuples_inserted += trans->tuples_inserted;
2258  tabstat->t_counts.t_tuples_updated += trans->tuples_updated;
2259  tabstat->t_counts.t_tuples_deleted += trans->tuples_deleted;
2260  /* inserted tuples are dead, deleted tuples are unaffected */
2261  tabstat->t_counts.t_delta_dead_tuples +=
2262  trans->tuples_inserted + trans->tuples_updated;
2263  tabstat->trans = trans->upper;
2264  pfree(trans);
2265  }
2266  }
2267  pfree(xact_state);
2268  }
2269 }
PgStat_Counter tuples_updated
Definition: pgstat.h:168
struct PgStat_TableXactStatus * next
Definition: pgstat.h:179
PgStat_TableCounts t_counts
Definition: pgstat.h:158
static PgStat_SubXactStatus * get_tabstat_stack_level(int nest_level)
Definition: pgstat.c:1899
void pfree(void *pointer)
Definition: mcxt.c:1031
PgStat_Counter t_tuples_updated
Definition: pgstat.h:105
static void pgstat_truncate_restore_counters(PgStat_TableXactStatus *trans)
Definition: pgstat.c:2035
PgStat_Counter tuples_inserted
Definition: pgstat.h:167
PgStat_Counter t_delta_dead_tuples
Definition: pgstat.h:111
struct PgStat_TableXactStatus * upper
Definition: pgstat.h:176
PgStat_Counter t_tuples_deleted
Definition: pgstat.h:106
PgStat_Counter tuples_deleted
Definition: pgstat.h:169
struct PgStat_SubXactStatus * prev
Definition: pgstat.c:215
#define Assert(condition)
Definition: c.h:732
static PgStat_SubXactStatus * pgStatXactStack
Definition: pgstat.c:219
struct PgStat_TableXactStatus * trans
Definition: pgstat.h:157
static zic_t trans[TZ_MAX_LEAPS]
Definition: zic.c:396
PgStat_TableXactStatus * first
Definition: pgstat.c:216
static void pgstat_truncate_save_counters(PgStat_TableXactStatus *trans)
Definition: pgstat.c:2020
PgStat_Counter t_tuples_inserted
Definition: pgstat.h:104
PgStat_TableStatus * parent
Definition: pgstat.h:177

◆ AtEOXact_PgStat()

void AtEOXact_PgStat ( bool  isCommit,
bool  parallel 
)

Definition at line 2094 of file pgstat.c.

References Assert, PgStat_SubXactStatus::first, PgStat_TableXactStatus::nest_level, PgStat_SubXactStatus::nest_level, PgStat_TableXactStatus::next, PgStat_TableXactStatus::parent, pgstat_clear_snapshot(), pgstat_truncate_restore_counters(), pgStatXactCommit, pgStatXactRollback, pgStatXactStack, PgStat_SubXactStatus::prev, PgStat_TableCounts::t_changed_tuples, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_delta_dead_tuples, PgStat_TableCounts::t_delta_live_tuples, PgStat_TableCounts::t_truncated, PgStat_TableCounts::t_tuples_deleted, PgStat_TableCounts::t_tuples_inserted, PgStat_TableCounts::t_tuples_updated, PgStat_TableStatus::trans, trans, PgStat_TableXactStatus::truncated, PgStat_TableXactStatus::tuples_deleted, PgStat_TableXactStatus::tuples_inserted, PgStat_TableXactStatus::tuples_updated, and PgStat_TableXactStatus::upper.

Referenced by AbortTransaction(), CommitTransaction(), and FinishPreparedTransaction().

2095 {
2096  PgStat_SubXactStatus *xact_state;
2097 
2098  /* Don't count parallel worker transaction stats */
2099  if (!parallel)
2100  {
2101  /*
2102  * Count transaction commit or abort. (We use counters, not just
2103  * bools, in case the reporting message isn't sent right away.)
2104  */
2105  if (isCommit)
2106  pgStatXactCommit++;
2107  else
2109  }
2110 
2111  /*
2112  * Transfer transactional insert/update counts into the base tabstat
2113  * entries. We don't bother to free any of the transactional state, since
2114  * it's all in TopTransactionContext and will go away anyway.
2115  */
2116  xact_state = pgStatXactStack;
2117  if (xact_state != NULL)
2118  {
2120 
2121  Assert(xact_state->nest_level == 1);
2122  Assert(xact_state->prev == NULL);
2123  for (trans = xact_state->first; trans != NULL; trans = trans->next)
2124  {
2125  PgStat_TableStatus *tabstat;
2126 
2127  Assert(trans->nest_level == 1);
2128  Assert(trans->upper == NULL);
2129  tabstat = trans->parent;
2130  Assert(tabstat->trans == trans);
2131  /* restore pre-truncate stats (if any) in case of aborted xact */
2132  if (!isCommit)
2134  /* count attempted actions regardless of commit/abort */
2135  tabstat->t_counts.t_tuples_inserted += trans->tuples_inserted;
2136  tabstat->t_counts.t_tuples_updated += trans->tuples_updated;
2137  tabstat->t_counts.t_tuples_deleted += trans->tuples_deleted;
2138  if (isCommit)
2139  {
2140  tabstat->t_counts.t_truncated = trans->truncated;
2141  if (trans->truncated)
2142  {
2143  /* forget live/dead stats seen by backend thus far */
2144  tabstat->t_counts.t_delta_live_tuples = 0;
2145  tabstat->t_counts.t_delta_dead_tuples = 0;
2146  }
2147  /* insert adds a live tuple, delete removes one */
2148  tabstat->t_counts.t_delta_live_tuples +=
2149  trans->tuples_inserted - trans->tuples_deleted;
2150  /* update and delete each create a dead tuple */
2151  tabstat->t_counts.t_delta_dead_tuples +=
2152  trans->tuples_updated + trans->tuples_deleted;
2153  /* insert, update, delete each count as one change event */
2154  tabstat->t_counts.t_changed_tuples +=
2155  trans->tuples_inserted + trans->tuples_updated +
2156  trans->tuples_deleted;
2157  }
2158  else
2159  {
2160  /* inserted tuples are dead, deleted tuples are unaffected */
2161  tabstat->t_counts.t_delta_dead_tuples +=
2162  trans->tuples_inserted + trans->tuples_updated;
2163  /* an aborted xact generates no changed_tuple events */
2164  }
2165  tabstat->trans = NULL;
2166  }
2167  }
2168  pgStatXactStack = NULL;
2169 
2170  /* Make sure any stats snapshot is thrown away */
2172 }
PgStat_Counter t_delta_live_tuples
Definition: pgstat.h:110
PgStat_Counter tuples_updated
Definition: pgstat.h:168
static int pgStatXactCommit
Definition: pgstat.c:221
struct PgStat_TableXactStatus * next
Definition: pgstat.h:179
PgStat_TableCounts t_counts
Definition: pgstat.h:158
PgStat_Counter t_tuples_updated
Definition: pgstat.h:105
static void pgstat_truncate_restore_counters(PgStat_TableXactStatus *trans)
Definition: pgstat.c:2035
static int pgStatXactRollback
Definition: pgstat.c:222
PgStat_Counter tuples_inserted
Definition: pgstat.h:167
PgStat_Counter t_delta_dead_tuples
Definition: pgstat.h:111
struct PgStat_TableXactStatus * upper
Definition: pgstat.h:176
PgStat_Counter t_tuples_deleted
Definition: pgstat.h:106
PgStat_Counter tuples_deleted
Definition: pgstat.h:169
struct PgStat_SubXactStatus * prev
Definition: pgstat.c:215
PgStat_Counter t_changed_tuples
Definition: pgstat.h:112
#define Assert(condition)
Definition: c.h:732
void pgstat_clear_snapshot(void)
Definition: pgstat.c:5796
static PgStat_SubXactStatus * pgStatXactStack
Definition: pgstat.c:219
struct PgStat_TableXactStatus * trans
Definition: pgstat.h:157
static zic_t trans[TZ_MAX_LEAPS]
Definition: zic.c:396
PgStat_TableXactStatus * first
Definition: pgstat.c:216
PgStat_Counter t_tuples_inserted
Definition: pgstat.h:104
PgStat_TableStatus * parent
Definition: pgstat.h:177

◆ AtPrepare_PgStat()

void AtPrepare_PgStat ( void  )

Definition at line 2280 of file pgstat.c.

References Assert, PgStat_TableXactStatus::deleted_pre_trunc, TwoPhasePgStatRecord::deleted_pre_trunc, PgStat_SubXactStatus::first, PgStat_TableXactStatus::inserted_pre_trunc, TwoPhasePgStatRecord::inserted_pre_trunc, PgStat_TableXactStatus::nest_level, PgStat_SubXactStatus::nest_level, PgStat_TableXactStatus::next, PgStat_TableXactStatus::parent, pgStatXactStack, PgStat_SubXactStatus::prev, RegisterTwoPhaseRecord(), PgStat_TableStatus::t_id, TwoPhasePgStatRecord::t_id, PgStat_TableStatus::t_shared, TwoPhasePgStatRecord::t_shared, TwoPhasePgStatRecord::t_truncated, PgStat_TableStatus::trans, trans, PgStat_TableXactStatus::truncated, PgStat_TableXactStatus::tuples_deleted, TwoPhasePgStatRecord::tuples_deleted, PgStat_TableXactStatus::tuples_inserted, TwoPhasePgStatRecord::tuples_inserted, PgStat_TableXactStatus::tuples_updated, TwoPhasePgStatRecord::tuples_updated, TWOPHASE_RM_PGSTAT_ID, PgStat_TableXactStatus::updated_pre_trunc, TwoPhasePgStatRecord::updated_pre_trunc, and PgStat_TableXactStatus::upper.

Referenced by PrepareTransaction().

2281 {
2282  PgStat_SubXactStatus *xact_state;
2283 
2284  xact_state = pgStatXactStack;
2285  if (xact_state != NULL)
2286  {
2288 
2289  Assert(xact_state->nest_level == 1);
2290  Assert(xact_state->prev == NULL);
2291  for (trans = xact_state->first; trans != NULL; trans = trans->next)
2292  {
2293  PgStat_TableStatus *tabstat;
2294  TwoPhasePgStatRecord record;
2295 
2296  Assert(trans->nest_level == 1);
2297  Assert(trans->upper == NULL);
2298  tabstat = trans->parent;
2299  Assert(tabstat->trans == trans);
2300 
2301  record.tuples_inserted = trans->tuples_inserted;
2302  record.tuples_updated = trans->tuples_updated;
2303  record.tuples_deleted = trans->tuples_deleted;
2304  record.inserted_pre_trunc = trans->inserted_pre_trunc;
2305  record.updated_pre_trunc = trans->updated_pre_trunc;
2306  record.deleted_pre_trunc = trans->deleted_pre_trunc;
2307  record.t_id = tabstat->t_id;
2308  record.t_shared = tabstat->t_shared;
2309  record.t_truncated = trans->truncated;
2310 
2312  &record, sizeof(TwoPhasePgStatRecord));
2313  }
2314  }
2315 }
PgStat_Counter tuples_updated
Definition: pgstat.h:168
struct PgStat_TableXactStatus * next
Definition: pgstat.h:179
PgStat_Counter deleted_pre_trunc
Definition: pgstat.h:173
PgStat_Counter deleted_pre_trunc
Definition: pgstat.c:234
void RegisterTwoPhaseRecord(TwoPhaseRmgrId rmid, uint16 info, const void *data, uint32 len)
Definition: twophase.c:1204
PgStat_Counter tuples_inserted
Definition: pgstat.h:167
PgStat_Counter updated_pre_trunc
Definition: pgstat.c:233
PgStat_Counter inserted_pre_trunc
Definition: pgstat.c:232
struct PgStat_TableXactStatus * upper
Definition: pgstat.h:176
PgStat_Counter tuples_updated
Definition: pgstat.c:230
PgStat_Counter tuples_deleted
Definition: pgstat.h:169
struct PgStat_SubXactStatus * prev
Definition: pgstat.c:215
#define Assert(condition)
Definition: c.h:732
PgStat_Counter inserted_pre_trunc
Definition: pgstat.h:171
PgStat_Counter tuples_inserted
Definition: pgstat.c:229
static PgStat_SubXactStatus * pgStatXactStack
Definition: pgstat.c:219
struct PgStat_TableXactStatus * trans
Definition: pgstat.h:157
PgStat_Counter tuples_deleted
Definition: pgstat.c:231
#define TWOPHASE_RM_PGSTAT_ID
Definition: twophase_rmgr.h:26
PgStat_Counter updated_pre_trunc
Definition: pgstat.h:172
static zic_t trans[TZ_MAX_LEAPS]
Definition: zic.c:396
PgStat_TableXactStatus * first
Definition: pgstat.c:216
PgStat_TableStatus * parent
Definition: pgstat.h:177

◆ backend_read_statsfile()

static void backend_read_statsfile ( void  )
static

Definition at line 5642 of file pgstat.c.

References Assert, CHECK_FOR_INTERRUPTS, elog, ereport, errmsg(), GetCurrentTimestamp(), InvalidOid, IsAutoVacuumLauncherProcess(), IsAutoVacuumWorkerProcess(), LOG, MyDatabaseId, pfree(), pg_usleep(), PGSTAT_INQ_LOOP_COUNT, PGSTAT_POLL_LOOP_COUNT, pgstat_read_db_statsfile_timestamp(), pgstat_read_statsfiles(), PGSTAT_RETRY_DELAY, pgstat_send_inquiry(), PGSTAT_STAT_INTERVAL, pgStatRunningInCollector, pstrdup(), timestamptz_to_str(), and TimestampTzPlusMilliseconds.

Referenced by pgstat_fetch_global(), pgstat_fetch_stat_archiver(), pgstat_fetch_stat_dbentry(), pgstat_fetch_stat_funcentry(), pgstat_fetch_stat_tabentry(), and pgstat_vacuum_stat().

5643 {
5644  TimestampTz min_ts = 0;
5645  TimestampTz ref_ts = 0;
5646  Oid inquiry_db;
5647  int count;
5648 
5649  /* already read it? */
5650  if (pgStatDBHash)
5651  return;
5653 
5654  /*
5655  * In a normal backend, we check staleness of the data for our own DB, and
5656  * so we send MyDatabaseId in inquiry messages. In the autovac launcher,
5657  * check staleness of the shared-catalog data, and send InvalidOid in
5658  * inquiry messages so as not to force writing unnecessary data.
5659  */
5661  inquiry_db = InvalidOid;
5662  else
5663  inquiry_db = MyDatabaseId;
5664 
5665  /*
5666  * Loop until fresh enough stats file is available or we ran out of time.
5667  * The stats inquiry message is sent repeatedly in case collector drops
5668  * it; but not every single time, as that just swamps the collector.
5669  */
5670  for (count = 0; count < PGSTAT_POLL_LOOP_COUNT; count++)
5671  {
5672  bool ok;
5673  TimestampTz file_ts = 0;
5674  TimestampTz cur_ts;
5675 
5677 
5678  ok = pgstat_read_db_statsfile_timestamp(inquiry_db, false, &file_ts);
5679 
5680  cur_ts = GetCurrentTimestamp();
5681  /* Calculate min acceptable timestamp, if we didn't already */
5682  if (count == 0 || cur_ts < ref_ts)
5683  {
5684  /*
5685  * We set the minimum acceptable timestamp to PGSTAT_STAT_INTERVAL
5686  * msec before now. This indirectly ensures that the collector
5687  * needn't write the file more often than PGSTAT_STAT_INTERVAL. In
5688  * an autovacuum worker, however, we want a lower delay to avoid
5689  * using stale data, so we use PGSTAT_RETRY_DELAY (since the
5690  * number of workers is low, this shouldn't be a problem).
5691  *
5692  * We don't recompute min_ts after sleeping, except in the
5693  * unlikely case that cur_ts went backwards. So we might end up
5694  * accepting a file a bit older than PGSTAT_STAT_INTERVAL. In
5695  * practice that shouldn't happen, though, as long as the sleep
5696  * time is less than PGSTAT_STAT_INTERVAL; and we don't want to
5697  * tell the collector that our cutoff time is less than what we'd
5698  * actually accept.
5699  */
5700  ref_ts = cur_ts;
5702  min_ts = TimestampTzPlusMilliseconds(ref_ts,
5704  else
5705  min_ts = TimestampTzPlusMilliseconds(ref_ts,
5707  }
5708 
5709  /*
5710  * If the file timestamp is actually newer than cur_ts, we must have
5711  * had a clock glitch (system time went backwards) or there is clock
5712  * skew between our processor and the stats collector's processor.
5713  * Accept the file, but send an inquiry message anyway to make
5714  * pgstat_recv_inquiry do a sanity check on the collector's time.
5715  */
5716  if (ok && file_ts > cur_ts)
5717  {
5718  /*
5719  * A small amount of clock skew between processors isn't terribly
5720  * surprising, but a large difference is worth logging. We
5721  * arbitrarily define "large" as 1000 msec.
5722  */
5723  if (file_ts >= TimestampTzPlusMilliseconds(cur_ts, 1000))
5724  {
5725  char *filetime;
5726  char *mytime;
5727 
5728  /* Copy because timestamptz_to_str returns a static buffer */
5729  filetime = pstrdup(timestamptz_to_str(file_ts));
5730  mytime = pstrdup(timestamptz_to_str(cur_ts));
5731  elog(LOG, "stats collector's time %s is later than backend local time %s",
5732  filetime, mytime);
5733  pfree(filetime);
5734  pfree(mytime);
5735  }
5736 
5737  pgstat_send_inquiry(cur_ts, min_ts, inquiry_db);
5738  break;
5739  }
5740 
5741  /* Normal acceptance case: file is not older than cutoff time */
5742  if (ok && file_ts >= min_ts)
5743  break;
5744 
5745  /* Not there or too old, so kick the collector and wait a bit */
5746  if ((count % PGSTAT_INQ_LOOP_COUNT) == 0)
5747  pgstat_send_inquiry(cur_ts, min_ts, inquiry_db);
5748 
5749  pg_usleep(PGSTAT_RETRY_DELAY * 1000L);
5750  }
5751 
5752  if (count >= PGSTAT_POLL_LOOP_COUNT)
5753  ereport(LOG,
5754  (errmsg("using stale statistics instead of current ones "
5755  "because stats collector is not responding")));
5756 
5757  /*
5758  * Autovacuum launcher wants stats about all databases, but a shallow read
5759  * is sufficient. Regular backends want a deep read for just the tables
5760  * they can see (MyDatabaseId + shared catalogs).
5761  */
5764  else
5766 }
#define PGSTAT_RETRY_DELAY
Definition: pgstat.c:80
TimestampTz GetCurrentTimestamp(void)
Definition: timestamp.c:1569
int64 TimestampTz
Definition: timestamp.h:39
#define PGSTAT_INQ_LOOP_COUNT
Definition: pgstat.c:94
char * pstrdup(const char *in)
Definition: mcxt.c:1161
static bool pgStatRunningInCollector
Definition: pgstat.c:155
#define LOG
Definition: elog.h:26
unsigned int Oid
Definition: postgres_ext.h:31
#define PGSTAT_POLL_LOOP_COUNT
Definition: pgstat.c:93
void pg_usleep(long microsec)
Definition: signal.c:53
void pfree(void *pointer)
Definition: mcxt.c:1031
static void pgstat_send_inquiry(TimestampTz clock_time, TimestampTz cutoff_time, Oid databaseid)
Definition: pgstat.c:1605
#define PGSTAT_STAT_INTERVAL
Definition: pgstat.c:77
bool IsAutoVacuumWorkerProcess(void)
Definition: autovacuum.c:3278
#define ereport(elevel, rest)
Definition: elog.h:141
static HTAB * pgstat_read_statsfiles(Oid onlydb, bool permanent, bool deep)
Definition: pgstat.c:5129
Oid MyDatabaseId
Definition: globals.c:85
#define InvalidOid
Definition: postgres_ext.h:36
#define TimestampTzPlusMilliseconds(tz, ms)
Definition: timestamp.h:56
static bool pgstat_read_db_statsfile_timestamp(Oid databaseid, bool permanent, TimestampTz *ts)
Definition: pgstat.c:5523
bool IsAutoVacuumLauncherProcess(void)
Definition: autovacuum.c:3272
#define Assert(condition)
Definition: c.h:732
static HTAB * pgStatDBHash
Definition: pgstat.c:244
int errmsg(const char *fmt,...)
Definition: elog.c:784
#define elog(elevel,...)
Definition: elog.h:226
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:99
const char * timestamptz_to_str(TimestampTz t)
Definition: timestamp.c:1729

◆ BackendStatusShmemSize()

Size BackendStatusShmemSize ( void  )

Definition at line 2652 of file pgstat.c.

References add_size(), mul_size(), NAMEDATALEN, NumBackendStatSlots, and pgstat_track_activity_query_size.

Referenced by CreateSharedMemoryAndSemaphores().

2653 {
2654  Size size;
2655 
2656  /* BackendStatusArray: */
2657  size = mul_size(sizeof(PgBackendStatus), NumBackendStatSlots);
2658  /* BackendAppnameBuffer: */
2659  size = add_size(size,
2661  /* BackendClientHostnameBuffer: */
2662  size = add_size(size,
2664  /* BackendActivityBuffer: */
2665  size = add_size(size,
2667 #ifdef USE_SSL
2668  /* BackendSslStatusBuffer: */
2669  size = add_size(size,
2671 #endif
2672  return size;
2673 }
#define NumBackendStatSlots
Definition: pgstat.c:118
#define NAMEDATALEN
int pgstat_track_activity_query_size
Definition: pgstat.c:128
Size mul_size(Size s1, Size s2)
Definition: shmem.c:492
Size add_size(Size s1, Size s2)
Definition: shmem.c:475
size_t Size
Definition: c.h:466

◆ CreateSharedBackendStatus()

void CreateSharedBackendStatus ( void  )

Definition at line 2680 of file pgstat.c.

References BackendActivityBuffer, BackendActivityBufferSize, BackendAppnameBuffer, BackendClientHostnameBuffer, i, MemSet, mul_size(), NAMEDATALEN, NumBackendStatSlots, pgstat_track_activity_query_size, ShmemInitStruct(), PgBackendStatus::st_activity_raw, PgBackendStatus::st_appname, PgBackendStatus::st_clienthostname, PgBackendStatus::st_gssstatus, and PgBackendStatus::st_sslstatus.

Referenced by CreateSharedMemoryAndSemaphores().

2681 {
2682  Size size;
2683  bool found;
2684  int i;
2685  char *buffer;
2686 
2687  /* Create or attach to the shared array */
2688  size = mul_size(sizeof(PgBackendStatus), NumBackendStatSlots);
2690  ShmemInitStruct("Backend Status Array", size, &found);
2691 
2692  if (!found)
2693  {
2694  /*
2695  * We're the first - initialize.
2696  */
2697  MemSet(BackendStatusArray, 0, size);
2698  }
2699 
2700  /* Create or attach to the shared appname buffer */
2702  BackendAppnameBuffer = (char *)
2703  ShmemInitStruct("Backend Application Name Buffer", size, &found);
2704 
2705  if (!found)
2706  {
2707  MemSet(BackendAppnameBuffer, 0, size);
2708 
2709  /* Initialize st_appname pointers. */
2710  buffer = BackendAppnameBuffer;
2711  for (i = 0; i < NumBackendStatSlots; i++)
2712  {
2713  BackendStatusArray[i].st_appname = buffer;
2714  buffer += NAMEDATALEN;
2715  }
2716  }
2717 
2718  /* Create or attach to the shared client hostname buffer */
2720  BackendClientHostnameBuffer = (char *)
2721  ShmemInitStruct("Backend Client Host Name Buffer", size, &found);
2722 
2723  if (!found)
2724  {
2726 
2727  /* Initialize st_clienthostname pointers. */
2728  buffer = BackendClientHostnameBuffer;
2729  for (i = 0; i < NumBackendStatSlots; i++)
2730  {
2732  buffer += NAMEDATALEN;
2733  }
2734  }
2735 
2736  /* Create or attach to the shared activity buffer */
2739  BackendActivityBuffer = (char *)
2740  ShmemInitStruct("Backend Activity Buffer",
2742  &found);
2743 
2744  if (!found)
2745  {
2747 
2748  /* Initialize st_activity pointers. */
2749  buffer = BackendActivityBuffer;
2750  for (i = 0; i < NumBackendStatSlots; i++)
2751  {
2754  }
2755  }
2756 
2757 #ifdef USE_SSL
2758  /* Create or attach to the shared SSL status buffer */
2760  BackendSslStatusBuffer = (PgBackendSSLStatus *)
2761  ShmemInitStruct("Backend SSL Status Buffer", size, &found);
2762 
2763  if (!found)
2764  {
2765  PgBackendSSLStatus *ptr;
2766 
2767  MemSet(BackendSslStatusBuffer, 0, size);
2768 
2769  /* Initialize st_sslstatus pointers. */
2770  ptr = BackendSslStatusBuffer;
2771  for (i = 0; i < NumBackendStatSlots; i++)
2772  {
2774  ptr++;
2775  }
2776  }
2777 #endif
2778 
2779 #ifdef ENABLE_GSS
2780  /* Create or attach to the shared GSSAPI status buffer */
2782  BackendGssStatusBuffer = (PgBackendGSSStatus *)
2783  ShmemInitStruct("Backend GSS Status Buffer", size, &found);
2784 
2785  if (!found)
2786  {
2787  PgBackendGSSStatus *ptr;
2788 
2789  MemSet(BackendGssStatusBuffer, 0, size);
2790 
2791  /* Initialize st_gssstatus pointers. */
2792  ptr = BackendGssStatusBuffer;
2793  for (i = 0; i < NumBackendStatSlots; i++)
2794  {
2796  ptr++;
2797  }
2798  }
2799 #endif
2800 }
static PgBackendStatus * BackendStatusArray
Definition: pgstat.c:2634
static char * BackendActivityBuffer
Definition: pgstat.c:2638
static Size BackendActivityBufferSize
Definition: pgstat.c:2639
#define MemSet(start, val, len)
Definition: c.h:955
#define NumBackendStatSlots
Definition: pgstat.c:118
char * st_clienthostname
Definition: pgstat.h:1062
#define NAMEDATALEN
static char * BackendAppnameBuffer
Definition: pgstat.c:2636
void * ShmemInitStruct(const char *name, Size size, bool *foundPtr)
Definition: shmem.c:372
char * st_activity_raw
Definition: pgstat.h:1085
int pgstat_track_activity_query_size
Definition: pgstat.c:128
char * st_appname
Definition: pgstat.h:1076
Size mul_size(Size s1, Size s2)
Definition: shmem.c:492
size_t Size
Definition: c.h:466
int i
PgBackendSSLStatus * st_sslstatus
Definition: pgstat.h:1066
PgBackendGSSStatus * st_gssstatus
Definition: pgstat.h:1070
static char * BackendClientHostnameBuffer
Definition: pgstat.c:2637

◆ find_funcstat_entry()

PgStat_BackendFunctionEntry* find_funcstat_entry ( Oid  func_id)

Definition at line 1674 of file pgstat.c.

References HASH_FIND, and hash_search().

Referenced by pg_stat_get_xact_function_calls(), pg_stat_get_xact_function_self_time(), and pg_stat_get_xact_function_total_time().

1675 {
1676  if (pgStatFunctions == NULL)
1677  return NULL;
1678 
1680  (void *) &func_id,
1681  HASH_FIND, NULL);
1682 }
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
static HTAB * pgStatFunctions
Definition: pgstat.c:197

◆ find_tabstat_entry()

PgStat_TableStatus* find_tabstat_entry ( Oid  rel_id)

Definition at line 1879 of file pgstat.c.

References HASH_FIND, hash_search(), and TabStatHashEntry::tsa_entry.

Referenced by pg_stat_get_xact_blocks_fetched(), pg_stat_get_xact_blocks_hit(), pg_stat_get_xact_numscans(), pg_stat_get_xact_tuples_deleted(), pg_stat_get_xact_tuples_fetched(), pg_stat_get_xact_tuples_hot_updated(), pg_stat_get_xact_tuples_inserted(), pg_stat_get_xact_tuples_returned(), and pg_stat_get_xact_tuples_updated().

1880 {
1881  TabStatHashEntry *hash_entry;
1882 
1883  /* If hashtable doesn't exist, there are no entries at all */
1884  if (!pgStatTabHash)
1885  return NULL;
1886 
1887  hash_entry = hash_search(pgStatTabHash, &rel_id, HASH_FIND, NULL);
1888  if (!hash_entry)
1889  return NULL;
1890 
1891  /* Note that this step could also return NULL, but that's correct */
1892  return hash_entry->tsa_entry;
1893 }
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
static HTAB * pgStatTabHash
Definition: pgstat.c:191
PgStat_TableStatus * tsa_entry
Definition: pgstat.c:185

◆ get_dbstat_filename()

static void get_dbstat_filename ( bool  permanent,
bool  tempname,
Oid  databaseid,
char *  filename,
int  len 
)
static

Definition at line 4980 of file pgstat.c.

References elog, ERROR, pgstat_stat_directory, PGSTAT_STAT_PERMANENT_DIRECTORY, and snprintf.

Referenced by pgstat_read_db_statsfile(), pgstat_recv_dropdb(), and pgstat_write_db_statsfile().

4982 {
4983  int printed;
4984 
4985  /* NB -- pgstat_reset_remove_files knows about the pattern this uses */
4986  printed = snprintf(filename, len, "%s/db_%u.%s",
4987  permanent ? PGSTAT_STAT_PERMANENT_DIRECTORY :
4989  databaseid,
4990  tempname ? "tmp" : "stat");
4991  if (printed >= len)
4992  elog(ERROR, "overlength pgstat path");
4993 }
#define PGSTAT_STAT_PERMANENT_DIRECTORY
Definition: pgstat.h:28
#define ERROR
Definition: elog.h:43
char * pgstat_stat_directory
Definition: pgstat.c:134
static char * filename
Definition: pg_dumpall.c:91
#define elog(elevel,...)
Definition: elog.h:226
#define snprintf
Definition: port.h:192

◆ get_tabstat_entry()

static PgStat_TableStatus * get_tabstat_entry ( Oid  rel_id,
bool  isshared 
)
static

Definition at line 1790 of file pgstat.c.

References HASHCTL::entrysize, HASH_BLOBS, hash_create(), HASH_ELEM, HASH_ENTER, hash_search(), HASHCTL::keysize, MemoryContextAllocZero(), pgStatTabList, PgStat_TableStatus::t_id, PgStat_TableStatus::t_shared, TABSTAT_QUANTUM, TopMemoryContext, TabStatusArray::tsa_entries, TabStatHashEntry::tsa_entry, TabStatusArray::tsa_next, and TabStatusArray::tsa_used.

Referenced by pgstat_initstats(), pgstat_twophase_postabort(), and pgstat_twophase_postcommit().

1791 {
1792  TabStatHashEntry *hash_entry;
1793  PgStat_TableStatus *entry;
1794  TabStatusArray *tsa;
1795  bool found;
1796 
1797  /*
1798  * Create hash table if we don't have it already.
1799  */
1800  if (pgStatTabHash == NULL)
1801  {
1802  HASHCTL ctl;
1803 
1804  memset(&ctl, 0, sizeof(ctl));
1805  ctl.keysize = sizeof(Oid);
1806  ctl.entrysize = sizeof(TabStatHashEntry);
1807 
1808  pgStatTabHash = hash_create("pgstat TabStatusArray lookup hash table",
1810  &ctl,
1811  HASH_ELEM | HASH_BLOBS);
1812  }
1813 
1814  /*
1815  * Find an entry or create a new one.
1816  */
1817  hash_entry = hash_search(pgStatTabHash, &rel_id, HASH_ENTER, &found);
1818  if (!found)
1819  {
1820  /* initialize new entry with null pointer */
1821  hash_entry->tsa_entry = NULL;
1822  }
1823 
1824  /*
1825  * If entry is already valid, we're done.
1826  */
1827  if (hash_entry->tsa_entry)
1828  return hash_entry->tsa_entry;
1829 
1830  /*
1831  * Locate the first pgStatTabList entry with free space, making a new list
1832  * entry if needed. Note that we could get an OOM failure here, but if so
1833  * we have left the hashtable and the list in a consistent state.
1834  */
1835  if (pgStatTabList == NULL)
1836  {
1837  /* Set up first pgStatTabList entry */
1840  sizeof(TabStatusArray));
1841  }
1842 
1843  tsa = pgStatTabList;
1844  while (tsa->tsa_used >= TABSTAT_QUANTUM)
1845  {
1846  if (tsa->tsa_next == NULL)
1847  tsa->tsa_next = (TabStatusArray *)
1849  sizeof(TabStatusArray));
1850  tsa = tsa->tsa_next;
1851  }
1852 
1853  /*
1854  * Allocate a PgStat_TableStatus entry within this list entry. We assume
1855  * the entry was already zeroed, either at creation or after last use.
1856  */
1857  entry = &tsa->tsa_entries[tsa->tsa_used++];
1858  entry->t_id = rel_id;
1859  entry->t_shared = isshared;
1860 
1861  /*
1862  * Now we can fill the entry in pgStatTabHash.
1863  */
1864  hash_entry->tsa_entry = entry;
1865 
1866  return entry;
1867 }
int tsa_used
Definition: pgstat.c:173
#define HASH_ELEM
Definition: hsearch.h:87
Size entrysize
Definition: hsearch.h:73
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
struct TabStatusArray * tsa_next
Definition: pgstat.c:172
unsigned int Oid
Definition: postgres_ext.h:31
struct TabStatHashEntry TabStatHashEntry
static HTAB * pgStatTabHash
Definition: pgstat.c:191
PgStat_TableStatus tsa_entries[TABSTAT_QUANTUM]
Definition: pgstat.c:174
MemoryContext TopMemoryContext
Definition: mcxt.c:44
#define HASH_BLOBS
Definition: hsearch.h:88
PgStat_TableStatus * tsa_entry
Definition: pgstat.c:185
HTAB * hash_create(const char *tabname, long nelem, HASHCTL *info, int flags)
Definition: dynahash.c:316
Size keysize
Definition: hsearch.h:72
void * MemoryContextAllocZero(MemoryContext context, Size size)
Definition: mcxt.c:814
static TabStatusArray * pgStatTabList
Definition: pgstat.c:177
#define TABSTAT_QUANTUM
Definition: pgstat.c:168

◆ get_tabstat_stack_level()

static PgStat_SubXactStatus* get_tabstat_stack_level ( int  nest_level)
static

Definition at line 1899 of file pgstat.c.

References PgStat_SubXactStatus::first, MemoryContextAlloc(), PgStat_SubXactStatus::nest_level, pgStatXactStack, PgStat_SubXactStatus::prev, and TopTransactionContext.

Referenced by add_tabstat_xact_level(), and AtEOSubXact_PgStat().

1900 {
1901  PgStat_SubXactStatus *xact_state;
1902 
1903  xact_state = pgStatXactStack;
1904  if (xact_state == NULL || xact_state->nest_level != nest_level)
1905  {
1906  xact_state = (PgStat_SubXactStatus *)
1908  sizeof(PgStat_SubXactStatus));
1909  xact_state->nest_level = nest_level;
1910  xact_state->prev = pgStatXactStack;
1911  xact_state->first = NULL;
1912  pgStatXactStack = xact_state;
1913  }
1914  return xact_state;
1915 }
MemoryContext TopTransactionContext
Definition: mcxt.c:49
struct PgStat_SubXactStatus * prev
Definition: pgstat.c:215
static PgStat_SubXactStatus * pgStatXactStack
Definition: pgstat.c:219
void * MemoryContextAlloc(MemoryContext context, Size size)
Definition: mcxt.c:771
PgStat_TableXactStatus * first
Definition: pgstat.c:216

◆ pgstat_beshutdown_hook()

static void pgstat_beshutdown_hook ( int  code,
Datum  arg 
)
static

Definition at line 3083 of file pgstat.c.

References MyBEEntry, MyDatabaseId, OidIsValid, PGSTAT_BEGIN_WRITE_ACTIVITY, PGSTAT_END_WRITE_ACTIVITY, pgstat_report_stat(), and PgBackendStatus::st_procpid.

Referenced by pgstat_initialize().

3084 {
3085  volatile PgBackendStatus *beentry = MyBEEntry;
3086 
3087  /*
3088  * If we got as far as discovering our own database ID, we can report what
3089  * we did to the collector. Otherwise, we'd be sending an invalid
3090  * database ID, so forget it. (This means that accesses to pg_database
3091  * during failed backend starts might never get counted.)
3092  */
3093  if (OidIsValid(MyDatabaseId))
3094  pgstat_report_stat(true);
3095 
3096  /*
3097  * Clear my status entry, following the protocol of bumping st_changecount
3098  * before and after. We use a volatile pointer here to ensure the
3099  * compiler doesn't try to get cute.
3100  */
3101  PGSTAT_BEGIN_WRITE_ACTIVITY(beentry);
3102 
3103  beentry->st_procpid = 0; /* mark invalid */
3104 
3105  PGSTAT_END_WRITE_ACTIVITY(beentry);
3106 }
#define OidIsValid(objectId)
Definition: c.h:638
static PgBackendStatus * MyBEEntry
Definition: pgstat.c:2635
#define PGSTAT_END_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1137
Oid MyDatabaseId
Definition: globals.c:85
#define PGSTAT_BEGIN_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1130
void pgstat_report_stat(bool force)
Definition: pgstat.c:813

◆ pgstat_bestart()

void pgstat_bestart ( void  )

Definition at line 2857 of file pgstat.c.

References am_walsender, application_name, Assert, B_AUTOVAC_LAUNCHER, B_AUTOVAC_WORKER, B_BACKEND, B_BG_WORKER, B_BG_WRITER, B_CHECKPOINTER, B_STARTUP, B_WAL_RECEIVER, B_WAL_SENDER, B_WAL_WRITER, be_gssapi_get_auth(), be_gssapi_get_enc(), be_gssapi_get_princ(), be_tls_get_cipher(), be_tls_get_cipher_bits(), be_tls_get_compression(), be_tls_get_peer_issuer_name(), be_tls_get_peer_serial(), be_tls_get_peer_subject_name(), be_tls_get_version(), BgWriterProcess, CheckpointerProcess, elog, FATAL, GetSessionUserId(), Port::gss, PgBackendGSSStatus::gss_auth, PgBackendGSSStatus::gss_enc, PgBackendGSSStatus::gss_princ, InvalidBackendId, InvalidOid, IsAutoVacuumLauncherProcess(), IsAutoVacuumWorkerProcess(), IsBackgroundWorker, MemSet, MyAuxProcType, MyBackendId, MyBEEntry, MyDatabaseId, MyProcPid, MyProcPort, MyStartTimestamp, NAMEDATALEN, NotAnAuxProcess, PGSTAT_BEGIN_WRITE_ACTIVITY, PGSTAT_END_WRITE_ACTIVITY, pgstat_report_appname(), pgstat_track_activity_query_size, PROGRESS_COMMAND_INVALID, Port::raddr, Port::remote_hostname, PgBackendSSLStatus::ssl_bits, PgBackendSSLStatus::ssl_cipher, PgBackendSSLStatus::ssl_client_dn, PgBackendSSLStatus::ssl_client_serial, PgBackendSSLStatus::ssl_compression, PgBackendSSLStatus::ssl_issuer_dn, PgBackendSSLStatus::ssl_version, PgBackendStatus::st_activity_raw, PgBackendStatus::st_activity_start_timestamp, PgBackendStatus::st_appname, PgBackendStatus::st_backendType, PgBackendStatus::st_changecount, PgBackendStatus::st_clientaddr, PgBackendStatus::st_clienthostname, PgBackendStatus::st_databaseid, PgBackendStatus::st_gss, PgBackendStatus::st_gssstatus, PgBackendStatus::st_proc_start_timestamp, PgBackendStatus::st_procpid, PgBackendStatus::st_progress_command, PgBackendStatus::st_progress_command_target, PgBackendStatus::st_ssl, PgBackendStatus::st_sslstatus, PgBackendStatus::st_state, PgBackendStatus::st_state_start_timestamp, PgBackendStatus::st_userid, PgBackendStatus::st_xact_start_timestamp, StartupProcess, STATE_UNDEFINED, strlcpy(), unvolatize, WalReceiverProcess, and WalWriterProcess.

Referenced by AuxiliaryProcessMain(), and InitPostgres().

2858 {
2859  volatile PgBackendStatus *vbeentry = MyBEEntry;
2860  PgBackendStatus lbeentry;
2861 #ifdef USE_SSL
2862  PgBackendSSLStatus lsslstatus;
2863 #endif
2864 #ifdef ENABLE_GSS
2865  PgBackendGSSStatus lgssstatus;
2866 #endif
2867 
2868  /* pgstats state must be initialized from pgstat_initialize() */
2869  Assert(vbeentry != NULL);
2870 
2871  /*
2872  * To minimize the time spent modifying the PgBackendStatus entry, and
2873  * avoid risk of errors inside the critical section, we first copy the
2874  * shared-memory struct to a local variable, then modify the data in the
2875  * local variable, then copy the local variable back to shared memory.
2876  * Only the last step has to be inside the critical section.
2877  *
2878  * Most of the data we copy from shared memory is just going to be
2879  * overwritten, but the struct's not so large that it's worth the
2880  * maintenance hassle to copy only the needful fields.
2881  */
2882  memcpy(&lbeentry,
2883  unvolatize(PgBackendStatus *, vbeentry),
2884  sizeof(PgBackendStatus));
2885 
2886  /* These structs can just start from zeroes each time, though */
2887 #ifdef USE_SSL
2888  memset(&lsslstatus, 0, sizeof(lsslstatus));
2889 #endif
2890 #ifdef ENABLE_GSS
2891  memset(&lgssstatus, 0, sizeof(lgssstatus));
2892 #endif
2893 
2894  /*
2895  * Now fill in all the fields of lbeentry, except for strings that are
2896  * out-of-line data. Those have to be handled separately, below.
2897  */
2898  lbeentry.st_procpid = MyProcPid;
2899 
2901  {
2903  {
2904  /* Autovacuum Launcher */
2906  }
2907  else if (IsAutoVacuumWorkerProcess())
2908  {
2909  /* Autovacuum Worker */
2910  lbeentry.st_backendType = B_AUTOVAC_WORKER;
2911  }
2912  else if (am_walsender)
2913  {
2914  /* Wal sender */
2915  lbeentry.st_backendType = B_WAL_SENDER;
2916  }
2917  else if (IsBackgroundWorker)
2918  {
2919  /* bgworker */
2920  lbeentry.st_backendType = B_BG_WORKER;
2921  }
2922  else
2923  {
2924  /* client-backend */
2925  lbeentry.st_backendType = B_BACKEND;
2926  }
2927  }
2928  else
2929  {
2930  /* Must be an auxiliary process */
2932  switch (MyAuxProcType)
2933  {
2934  case StartupProcess:
2935  lbeentry.st_backendType = B_STARTUP;
2936  break;
2937  case BgWriterProcess:
2938  lbeentry.st_backendType = B_BG_WRITER;
2939  break;
2940  case CheckpointerProcess:
2941  lbeentry.st_backendType = B_CHECKPOINTER;
2942  break;
2943  case WalWriterProcess:
2944  lbeentry.st_backendType = B_WAL_WRITER;
2945  break;
2946  case WalReceiverProcess:
2947  lbeentry.st_backendType = B_WAL_RECEIVER;
2948  break;
2949  default:
2950  elog(FATAL, "unrecognized process type: %d",
2951  (int) MyAuxProcType);
2952  }
2953  }
2954 
2956  lbeentry.st_activity_start_timestamp = 0;
2957  lbeentry.st_state_start_timestamp = 0;
2958  lbeentry.st_xact_start_timestamp = 0;
2959  lbeentry.st_databaseid = MyDatabaseId;
2960 
2961  /* We have userid for client-backends, wal-sender and bgworker processes */
2962  if (lbeentry.st_backendType == B_BACKEND
2963  || lbeentry.st_backendType == B_WAL_SENDER
2964  || lbeentry.st_backendType == B_BG_WORKER)
2965  lbeentry.st_userid = GetSessionUserId();
2966  else
2967  lbeentry.st_userid = InvalidOid;
2968 
2969  /*
2970  * We may not have a MyProcPort (eg, if this is the autovacuum process).
2971  * If so, use all-zeroes client address, which is dealt with specially in
2972  * pg_stat_get_backend_client_addr and pg_stat_get_backend_client_port.
2973  */
2974  if (MyProcPort)
2975  memcpy(&lbeentry.st_clientaddr, &MyProcPort->raddr,
2976  sizeof(lbeentry.st_clientaddr));
2977  else
2978  MemSet(&lbeentry.st_clientaddr, 0, sizeof(lbeentry.st_clientaddr));
2979 
2980 #ifdef USE_SSL
2981  if (MyProcPort && MyProcPort->ssl != NULL)
2982  {
2983  lbeentry.st_ssl = true;
2991  }
2992  else
2993  {
2994  lbeentry.st_ssl = false;
2995  }
2996 #else
2997  lbeentry.st_ssl = false;
2998 #endif
2999 
3000 #ifdef ENABLE_GSS
3001  if (MyProcPort && MyProcPort->gss != NULL)
3002  {
3003  lbeentry.st_gss = true;
3004  lgssstatus.gss_auth = be_gssapi_get_auth(MyProcPort);
3005  lgssstatus.gss_enc = be_gssapi_get_enc(MyProcPort);
3006 
3007  if (lgssstatus.gss_auth)
3009  }
3010  else
3011  {
3012  lbeentry.st_gss = false;
3013  }
3014 #else
3015  lbeentry.st_gss = false;
3016 #endif
3017 
3018  lbeentry.st_state = STATE_UNDEFINED;
3021 
3022  /*
3023  * we don't zero st_progress_param here to save cycles; nobody should
3024  * examine it until st_progress_command has been set to something other
3025  * than PROGRESS_COMMAND_INVALID
3026  */
3027 
3028  /*
3029  * We're ready to enter the critical section that fills the shared-memory
3030  * status entry. We follow the protocol of bumping st_changecount before
3031  * and after; and make sure it's even afterwards. We use a volatile
3032  * pointer here to ensure the compiler doesn't try to get cute.
3033  */
3034  PGSTAT_BEGIN_WRITE_ACTIVITY(vbeentry);
3035 
3036  /* make sure we'll memcpy the same st_changecount back */
3037  lbeentry.st_changecount = vbeentry->st_changecount;
3038 
3039  memcpy(unvolatize(PgBackendStatus *, vbeentry),
3040  &lbeentry,
3041  sizeof(PgBackendStatus));
3042 
3043  /*
3044  * We can write the out-of-line strings and structs using the pointers
3045  * that are in lbeentry; this saves some de-volatilizing messiness.
3046  */
3047  lbeentry.st_appname[0] = '\0';
3050  NAMEDATALEN);
3051  else
3052  lbeentry.st_clienthostname[0] = '\0';
3053  lbeentry.st_activity_raw[0] = '\0';
3054  /* Also make sure the last byte in each string area is always 0 */
3055  lbeentry.st_appname[NAMEDATALEN - 1] = '\0';
3056  lbeentry.st_clienthostname[NAMEDATALEN - 1] = '\0';
3058 
3059 #ifdef USE_SSL
3060  memcpy(lbeentry.st_sslstatus, &lsslstatus, sizeof(PgBackendSSLStatus));
3061 #endif
3062 #ifdef ENABLE_GSS
3063  memcpy(lbeentry.st_gssstatus, &lgssstatus, sizeof(PgBackendGSSStatus));
3064 #endif
3065 
3066  PGSTAT_END_WRITE_ACTIVITY(vbeentry);
3067 
3068  /* Update app name to current GUC setting */
3069  if (application_name)
3071 }
char ssl_issuer_dn[NAMEDATALEN]
Definition: pgstat.h:993
char gss_princ[NAMEDATALEN]
Definition: pgstat.h:1007
bool ssl_compression
Definition: pgstat.h:982
char ssl_cipher[NAMEDATALEN]
Definition: pgstat.h:984
Oid st_progress_command_target
Definition: pgstat.h:1097
int MyProcPid
Definition: globals.c:40
BackendId MyBackendId
Definition: globals.c:81
struct Port * MyProcPort
Definition: globals.c:43
const char * be_gssapi_get_princ(Port *port)
TimestampTz st_activity_start_timestamp
Definition: pgstat.h:1055
char ssl_client_dn[NAMEDATALEN]
Definition: pgstat.h:985
char ssl_version[NAMEDATALEN]
Definition: pgstat.h:983
SockAddr st_clientaddr
Definition: pgstat.h:1061
#define MemSet(start, val, len)
Definition: c.h:955
ProgressCommandType st_progress_command
Definition: pgstat.h:1096
char ssl_client_serial[NAMEDATALEN]
Definition: pgstat.h:991
BackendState st_state
Definition: pgstat.h:1073
char * st_clienthostname
Definition: pgstat.h:1062
Oid GetSessionUserId(void)
Definition: miscinit.c:414
bool IsBackgroundWorker
Definition: globals.c:111
Oid st_databaseid
Definition: pgstat.h:1059
#define NAMEDATALEN
char * remote_hostname
Definition: libpq-be.h:128
SockAddr raddr
Definition: libpq-be.h:126
bool am_walsender
Definition: walsender.c:114
bool be_tls_get_compression(Port *port)
#define FATAL
Definition: elog.h:52
static PgBackendStatus * MyBEEntry
Definition: pgstat.c:2635
#define PGSTAT_END_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1137
char * st_activity_raw
Definition: pgstat.h:1085
int pgstat_track_activity_query_size
Definition: pgstat.c:128
TimestampTz st_state_start_timestamp
Definition: pgstat.h:1056
bool IsAutoVacuumWorkerProcess(void)
Definition: autovacuum.c:3278
char * st_appname
Definition: pgstat.h:1076
bool be_gssapi_get_enc(Port *port)
#define InvalidBackendId
Definition: backendid.h:23
TimestampTz MyStartTimestamp
Definition: globals.c:42
int be_tls_get_cipher_bits(Port *port)
AuxProcType MyAuxProcType
Definition: bootstrap.c:72
Oid MyDatabaseId
Definition: globals.c:85
BackendType st_backendType
Definition: pgstat.h:1050
void pgstat_report_appname(const char *appname)
Definition: pgstat.c:3294
#define InvalidOid
Definition: postgres_ext.h:36
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
bool IsAutoVacuumLauncherProcess(void)
Definition: autovacuum.c:3272
#define Assert(condition)
Definition: c.h:732
const char * be_tls_get_version(Port *port)
void be_tls_get_peer_issuer_name(Port *port, char *ptr, size_t len)
char * application_name
Definition: guc.c:529
void be_tls_get_peer_subject_name(Port *port, char *ptr, size_t len)
void * gss
Definition: libpq-be.h:184
#define unvolatize(underlying_type, expr)
Definition: c.h:1165
void be_tls_get_peer_serial(Port *port, char *ptr, size_t len)
TimestampTz st_xact_start_timestamp
Definition: pgstat.h:1054
#define elog(elevel,...)
Definition: elog.h:226
int st_changecount
Definition: pgstat.h:1044
const char * be_tls_get_cipher(Port *port)
TimestampTz st_proc_start_timestamp
Definition: pgstat.h:1053
PgBackendSSLStatus * st_sslstatus
Definition: pgstat.h:1066
#define PGSTAT_BEGIN_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1130
PgBackendGSSStatus * st_gssstatus
Definition: pgstat.h:1070
bool be_gssapi_get_auth(Port *port)

◆ pgstat_clear_snapshot()

void pgstat_clear_snapshot ( void  )

Definition at line 5796 of file pgstat.c.

References localNumBackends, and MemoryContextDelete().

Referenced by AtEOXact_PgStat(), autovac_refresh_stats(), AutoVacLauncherMain(), pg_stat_clear_snapshot(), and PostPrepare_PgStat().

5797 {
5798  /* Release memory, if any was allocated */
5799  if (pgStatLocalContext)
5801 
5802  /* Reset variables */
5803  pgStatLocalContext = NULL;
5804  pgStatDBHash = NULL;
5805  localBackendStatusTable = NULL;
5806  localNumBackends = 0;
5807 }
void MemoryContextDelete(MemoryContext context)
Definition: mcxt.c:211
static LocalPgBackendStatus * localBackendStatusTable
Definition: pgstat.c:247
static HTAB * pgStatDBHash
Definition: pgstat.c:244
static int localNumBackends
Definition: pgstat.c:250
static MemoryContext pgStatLocalContext
Definition: pgstat.c:243

◆ pgstat_clip_activity()

char* pgstat_clip_activity ( const char *  raw_activity)

Definition at line 6544 of file pgstat.c.

References cliplen(), pg_mbcliplen(), pgstat_track_activity_query_size, and pnstrdup().

Referenced by pg_stat_get_activity(), pg_stat_get_backend_activity(), and pgstat_get_backend_current_activity().

6545 {
6546  char *activity;
6547  int rawlen;
6548  int cliplen;
6549 
6550  /*
6551  * Some callers, like pgstat_get_backend_current_activity(), do not
6552  * guarantee that the buffer isn't concurrently modified. We try to take
6553  * care that the buffer is always terminated by a NUL byte regardless, but
6554  * let's still be paranoid about the string's length. In those cases the
6555  * underlying buffer is guaranteed to be pgstat_track_activity_query_size
6556  * large.
6557  */
6558  activity = pnstrdup(raw_activity, pgstat_track_activity_query_size - 1);
6559 
6560  /* now double-guaranteed to be NUL terminated */
6561  rawlen = strlen(activity);
6562 
6563  /*
6564  * All supported server-encodings make it possible to determine the length
6565  * of a multi-byte character from its first byte (this is not the case for
6566  * client encodings, see GB18030). As st_activity is always stored using
6567  * server encoding, this allows us to perform multi-byte aware truncation,
6568  * even if the string earlier was truncated in the middle of a multi-byte
6569  * character.
6570  */
6571  cliplen = pg_mbcliplen(activity, rawlen,
6573 
6574  activity[cliplen] = '\0';
6575 
6576  return activity;
6577 }
char * pnstrdup(const char *in, Size len)
Definition: mcxt.c:1172
int pg_mbcliplen(const char *mbstr, int len, int limit)
Definition: mbutils.c:812
int pgstat_track_activity_query_size
Definition: pgstat.c:128
static int cliplen(const char *str, int len, int limit)
Definition: mbutils.c:879

◆ pgstat_collect_oids()

static HTAB * pgstat_collect_oids ( Oid  catalogid,
AttrNumber  anum_oid 
)
static

Definition at line 1205 of file pgstat.c.

References AccessShareLock, Assert, CHECK_FOR_INTERRUPTS, CurrentMemoryContext, HASHCTL::entrysize, ForwardScanDirection, GetLatestSnapshot(), HASH_BLOBS, HASH_CONTEXT, hash_create(), HASH_ELEM, HASH_ENTER, hash_search(), HASHCTL::hcxt, heap_getattr, heap_getnext(), HASHCTL::keysize, PGSTAT_TAB_HASH_SIZE, RegisterSnapshot(), RelationGetDescr, table_beginscan(), table_close(), table_endscan(), table_open(), and UnregisterSnapshot().

Referenced by pgstat_vacuum_stat().

1206 {
1207  HTAB *htab;
1208  HASHCTL hash_ctl;
1209  Relation rel;
1210  TableScanDesc scan;
1211  HeapTuple tup;
1212  Snapshot snapshot;
1213 
1214  memset(&hash_ctl, 0, sizeof(hash_ctl));
1215  hash_ctl.keysize = sizeof(Oid);
1216  hash_ctl.entrysize = sizeof(Oid);
1217  hash_ctl.hcxt = CurrentMemoryContext;
1218  htab = hash_create("Temporary table of OIDs",
1220  &hash_ctl,
1222 
1223  rel = table_open(catalogid, AccessShareLock);
1224  snapshot = RegisterSnapshot(GetLatestSnapshot());
1225  scan = table_beginscan(rel, snapshot, 0, NULL);
1226  while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
1227  {
1228  Oid thisoid;
1229  bool isnull;
1230 
1231  thisoid = heap_getattr(tup, anum_oid, RelationGetDescr(rel), &isnull);
1232  Assert(!isnull);
1233 
1235 
1236  (void) hash_search(htab, (void *) &thisoid, HASH_ENTER, NULL);
1237  }
1238  table_endscan(scan);
1239  UnregisterSnapshot(snapshot);
1241 
1242  return htab;
1243 }
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:133
#define HASH_CONTEXT
Definition: hsearch.h:93
#define HASH_ELEM
Definition: hsearch.h:87
Snapshot RegisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:865
MemoryContext hcxt
Definition: hsearch.h:78
#define RelationGetDescr(relation)
Definition: rel.h:442
#define PGSTAT_TAB_HASH_SIZE
Definition: pgstat.c:105
#define AccessShareLock
Definition: lockdefs.h:36
Size entrysize
Definition: hsearch.h:73
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
unsigned int Oid
Definition: postgres_ext.h:31
Definition: dynahash.c:208
static TableScanDesc table_beginscan(Relation rel, Snapshot snapshot, int nkeys, struct ScanKeyData *key)
Definition: tableam.h:736
HeapTuple heap_getnext(TableScanDesc sscan, ScanDirection direction)
Definition: heapam.c:1290
MemoryContext CurrentMemoryContext
Definition: mcxt.c:38
void UnregisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:907
#define heap_getattr(tup, attnum, tupleDesc, isnull)
Definition: htup_details.h:762
#define HASH_BLOBS
Definition: hsearch.h:88
HTAB * hash_create(const char *tabname, long nelem, HASHCTL *info, int flags)
Definition: dynahash.c:316
Size keysize
Definition: hsearch.h:72
#define Assert(condition)
Definition: c.h:732
Snapshot GetLatestSnapshot(void)
Definition: snapmgr.c:381
static void table_endscan(TableScanDesc scan)
Definition: tableam.h:831
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:99
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39

◆ pgstat_count_heap_delete()

void pgstat_count_heap_delete ( Relation  rel)

Definition at line 1994 of file pgstat.c.

References add_tabstat_xact_level(), GetCurrentTransactionNestLevel(), PgStat_TableXactStatus::nest_level, RelationData::pgstat_info, PgStat_TableStatus::trans, and PgStat_TableXactStatus::tuples_deleted.

Referenced by heap_abort_speculative(), and heap_delete().

1995 {
1996  PgStat_TableStatus *pgstat_info = rel->pgstat_info;
1997 
1998  if (pgstat_info != NULL)
1999  {
2000  /* We have to log the effect at the proper transactional level */
2001  int nest_level = GetCurrentTransactionNestLevel();
2002 
2003  if (pgstat_info->trans == NULL ||
2004  pgstat_info->trans->nest_level != nest_level)
2005  add_tabstat_xact_level(pgstat_info, nest_level);
2006 
2007  pgstat_info->trans->tuples_deleted++;
2008  }
2009 }
PgStat_Counter tuples_deleted
Definition: pgstat.h:169
int GetCurrentTransactionNestLevel(void)
Definition: xact.c:842
struct PgStat_TableStatus * pgstat_info
Definition: rel.h:204
static void add_tabstat_xact_level(PgStat_TableStatus *pgstat_info, int nest_level)
Definition: pgstat.c:1921
struct PgStat_TableXactStatus * trans
Definition: pgstat.h:157

◆ pgstat_count_heap_insert()

void pgstat_count_heap_insert ( Relation  rel,
PgStat_Counter  n 
)

Definition at line 1948 of file pgstat.c.

References add_tabstat_xact_level(), GetCurrentTransactionNestLevel(), PgStat_TableXactStatus::nest_level, RelationData::pgstat_info, PgStat_TableStatus::trans, and PgStat_TableXactStatus::tuples_inserted.

Referenced by ExecRefreshMatView(), heap_insert(), and heap_multi_insert().

1949 {
1950  PgStat_TableStatus *pgstat_info = rel->pgstat_info;
1951 
1952  if (pgstat_info != NULL)
1953  {
1954  /* We have to log the effect at the proper transactional level */
1955  int nest_level = GetCurrentTransactionNestLevel();
1956 
1957  if (pgstat_info->trans == NULL ||
1958  pgstat_info->trans->nest_level != nest_level)
1959  add_tabstat_xact_level(pgstat_info, nest_level);
1960 
1961  pgstat_info->trans->tuples_inserted += n;
1962  }
1963 }
PgStat_Counter tuples_inserted
Definition: pgstat.h:167
int GetCurrentTransactionNestLevel(void)
Definition: xact.c:842
struct PgStat_TableStatus * pgstat_info
Definition: rel.h:204
static void add_tabstat_xact_level(PgStat_TableStatus *pgstat_info, int nest_level)
Definition: pgstat.c:1921
struct PgStat_TableXactStatus * trans
Definition: pgstat.h:157

◆ pgstat_count_heap_update()

void pgstat_count_heap_update ( Relation  rel,
bool  hot 
)

Definition at line 1969 of file pgstat.c.

References add_tabstat_xact_level(), GetCurrentTransactionNestLevel(), PgStat_TableXactStatus::nest_level, RelationData::pgstat_info, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_tuples_hot_updated, PgStat_TableStatus::trans, and PgStat_TableXactStatus::tuples_updated.

Referenced by heap_update().

1970 {
1971  PgStat_TableStatus *pgstat_info = rel->pgstat_info;
1972 
1973  if (pgstat_info != NULL)
1974  {
1975  /* We have to log the effect at the proper transactional level */
1976  int nest_level = GetCurrentTransactionNestLevel();
1977 
1978  if (pgstat_info->trans == NULL ||
1979  pgstat_info->trans->nest_level != nest_level)
1980  add_tabstat_xact_level(pgstat_info, nest_level);
1981 
1982  pgstat_info->trans->tuples_updated++;
1983 
1984  /* t_tuples_hot_updated is nontransactional, so just advance it */
1985  if (hot)
1986  pgstat_info->t_counts.t_tuples_hot_updated++;
1987  }
1988 }
PgStat_Counter tuples_updated
Definition: pgstat.h:168
PgStat_Counter t_tuples_hot_updated
Definition: pgstat.h:107
PgStat_TableCounts t_counts
Definition: pgstat.h:158
int GetCurrentTransactionNestLevel(void)
Definition: xact.c:842
struct PgStat_TableStatus * pgstat_info
Definition: rel.h:204
static void add_tabstat_xact_level(PgStat_TableStatus *pgstat_info, int nest_level)
Definition: pgstat.c:1921
struct PgStat_TableXactStatus * trans
Definition: pgstat.h:157

◆ pgstat_count_truncate()

void pgstat_count_truncate ( Relation  rel)

Definition at line 2049 of file pgstat.c.

References add_tabstat_xact_level(), GetCurrentTransactionNestLevel(), PgStat_TableXactStatus::nest_level, RelationData::pgstat_info, pgstat_truncate_save_counters(), PgStat_TableStatus::trans, PgStat_TableXactStatus::tuples_deleted, PgStat_TableXactStatus::tuples_inserted, and PgStat_TableXactStatus::tuples_updated.

Referenced by ExecRefreshMatView(), and ExecuteTruncateGuts().

2050 {
2051  PgStat_TableStatus *pgstat_info = rel->pgstat_info;
2052 
2053  if (pgstat_info != NULL)
2054  {
2055  /* We have to log the effect at the proper transactional level */
2056  int nest_level = GetCurrentTransactionNestLevel();
2057 
2058  if (pgstat_info->trans == NULL ||
2059  pgstat_info->trans->nest_level != nest_level)
2060  add_tabstat_xact_level(pgstat_info, nest_level);
2061 
2062  pgstat_truncate_save_counters(pgstat_info->trans);
2063  pgstat_info->trans->tuples_inserted = 0;
2064  pgstat_info->trans->tuples_updated = 0;
2065  pgstat_info->trans->tuples_deleted = 0;
2066  }
2067 }
PgStat_Counter tuples_updated
Definition: pgstat.h:168
PgStat_Counter tuples_inserted
Definition: pgstat.h:167
PgStat_Counter tuples_deleted
Definition: pgstat.h:169
int GetCurrentTransactionNestLevel(void)
Definition: xact.c:842
struct PgStat_TableStatus * pgstat_info
Definition: rel.h:204
static void add_tabstat_xact_level(PgStat_TableStatus *pgstat_info, int nest_level)
Definition: pgstat.c:1921
struct PgStat_TableXactStatus * trans
Definition: pgstat.h:157
static void pgstat_truncate_save_counters(PgStat_TableXactStatus *trans)
Definition: pgstat.c:2020

◆ pgstat_db_requested()

static bool pgstat_db_requested ( Oid  databaseid)
static

Definition at line 6517 of file pgstat.c.

References InvalidOid, list_member_oid(), and NIL.

Referenced by pgstat_write_statsfiles().

6518 {
6519  /*
6520  * If any requests are outstanding at all, we should write the stats for
6521  * shared catalogs (the "database" with OID 0). This ensures that
6522  * backends will see up-to-date stats for shared catalogs, even though
6523  * they send inquiry messages mentioning only their own DB.
6524  */
6525  if (databaseid == InvalidOid && pending_write_requests != NIL)
6526  return true;
6527 
6528  /* Search to see if there's an open request to write this database. */
6529  if (list_member_oid(pending_write_requests, databaseid))
6530  return true;
6531 
6532  return false;
6533 }
#define NIL
Definition: pg_list.h:65
static List * pending_write_requests
Definition: pgstat.c:265
#define InvalidOid
Definition: postgres_ext.h:36
bool list_member_oid(const List *list, Oid datum)
Definition: list.c:674

◆ pgstat_drop_database()

void pgstat_drop_database ( Oid  databaseid)

Definition at line 1255 of file pgstat.c.

References PgStat_MsgTabpurge::m_databaseid, PgStat_MsgDropdb::m_databaseid, PgStat_MsgTabpurge::m_hdr, PgStat_MsgDropdb::m_hdr, PgStat_MsgTabpurge::m_nentries, PgStat_MsgTabpurge::m_tableid, MyDatabaseId, offsetof, PGINVALID_SOCKET, PGSTAT_MTYPE_DROPDB, PGSTAT_MTYPE_TABPURGE, pgstat_send(), pgstat_setheader(), and pgStatSock.

Referenced by dropdb(), and pgstat_vacuum_stat().

1256 {
1257  PgStat_MsgDropdb msg;
1258 
1260  return;
1261 
1263  msg.m_databaseid = databaseid;
1264  pgstat_send(&msg, sizeof(msg));
1265 }
static void pgstat_send(void *msg, int len)
Definition: pgstat.c:4341
NON_EXEC_STATIC pgsocket pgStatSock
Definition: pgstat.c:149
Oid m_databaseid
Definition: pgstat.h:306
PgStat_MsgHdr m_hdr
Definition: pgstat.h:305
#define PGINVALID_SOCKET
Definition: port.h:33
static void pgstat_setheader(PgStat_MsgHdr *hdr, StatMsgType mtype)
Definition: pgstat.c:4328

◆ pgstat_end_function_usage()

void pgstat_end_function_usage ( PgStat_FunctionCallUsage fcu,
bool  finalize 
)

Definition at line 1694 of file pgstat.c.

References PgStat_FunctionCounts::f_numcalls, PgStat_FunctionCounts::f_self_time, PgStat_FunctionCallUsage::f_start, PgStat_FunctionCounts::f_total_time, PgStat_FunctionCallUsage::fs, have_function_stats, INSTR_TIME_ADD, INSTR_TIME_SET_CURRENT, INSTR_TIME_SUBTRACT, PgStat_FunctionCallUsage::save_f_total_time, PgStat_FunctionCallUsage::save_total, and total_func_time.

Referenced by call_pltcl_start_proc(), EventTriggerInvoke(), ExecCallTriggerFunc(), ExecEvalFuncExprFusage(), ExecEvalFuncExprStrictFusage(), ExecMakeFunctionResultSet(), ExecMakeTableFunctionResult(), ExecuteCallStmt(), and fmgr_security_definer().

1695 {
1696  PgStat_FunctionCounts *fs = fcu->fs;
1697  instr_time f_total;
1698  instr_time f_others;
1699  instr_time f_self;
1700 
1701  /* stats not wanted? */
1702  if (fs == NULL)
1703  return;
1704 
1705  /* total elapsed time in this function call */
1706  INSTR_TIME_SET_CURRENT(f_total);
1707  INSTR_TIME_SUBTRACT(f_total, fcu->f_start);
1708 
1709  /* self usage: elapsed minus anything already charged to other calls */
1710  f_others = total_func_time;
1711  INSTR_TIME_SUBTRACT(f_others, fcu->save_total);
1712  f_self = f_total;
1713  INSTR_TIME_SUBTRACT(f_self, f_others);
1714 
1715  /* update backend-wide total time */
1717 
1718  /*
1719  * Compute the new f_total_time as the total elapsed time added to the
1720  * pre-call value of f_total_time. This is necessary to avoid
1721  * double-counting any time taken by recursive calls of myself. (We do
1722  * not need any similar kluge for self time, since that already excludes
1723  * any recursive calls.)
1724  */
1725  INSTR_TIME_ADD(f_total, fcu->save_f_total_time);
1726 
1727  /* update counters in function stats table */
1728  if (finalize)
1729  fs->f_numcalls++;
1730  fs->f_total_time = f_total;
1731  INSTR_TIME_ADD(fs->f_self_time, f_self);
1732 
1733  /* indicate that we have something to send */
1734  have_function_stats = true;
1735 }
instr_time f_self_time
Definition: pgstat.h:463
instr_time save_total
Definition: pgstat.h:1201
struct timeval instr_time
Definition: instr_time.h:150
instr_time f_total_time
Definition: pgstat.h:462
PgStat_FunctionCounts * fs
Definition: pgstat.h:1197
PgStat_Counter f_numcalls
Definition: pgstat.h:461
#define INSTR_TIME_SUBTRACT(x, y)
Definition: instr_time.h:170
#define INSTR_TIME_ADD(x, y)
Definition: instr_time.h:158
static instr_time total_func_time
Definition: pgstat.c:276
static bool have_function_stats
Definition: pgstat.c:203
#define INSTR_TIME_SET_CURRENT(t)
Definition: instr_time.h:156
instr_time save_f_total_time
Definition: pgstat.h:1199

◆ pgstat_exit()

static void pgstat_exit ( SIGNAL_ARGS  )
static

Definition at line 4686 of file pgstat.c.

References MyLatch, need_exit, and SetLatch().

Referenced by PgstatCollectorMain().

4687 {
4688  int save_errno = errno;
4689 
4690  need_exit = true;
4691  SetLatch(MyLatch);
4692 
4693  errno = save_errno;
4694 }
void SetLatch(Latch *latch)
Definition: latch.c:436
static volatile bool need_exit
Definition: pgstat.c:268
struct Latch * MyLatch
Definition: globals.c:54

◆ pgstat_fetch_global()

◆ pgstat_fetch_stat_archiver()

PgStat_ArchiverStats* pgstat_fetch_stat_archiver ( void  )

Definition at line 2604 of file pgstat.c.

References archiverStats, and backend_read_statsfile().

Referenced by pg_stat_get_archiver().

2605 {
2607 
2608  return &archiverStats;
2609 }
static void backend_read_statsfile(void)
Definition: pgstat.c:5642
static PgStat_ArchiverStats archiverStats
Definition: pgstat.c:257

◆ pgstat_fetch_stat_beentry()

◆ pgstat_fetch_stat_dbentry()

PgStat_StatDBEntry* pgstat_fetch_stat_dbentry ( Oid  dbid)

Definition at line 2432 of file pgstat.c.

References backend_read_statsfile(), HASH_FIND, and hash_search().

Referenced by do_autovacuum(), do_start_worker(), pg_stat_get_db_blk_read_time(), pg_stat_get_db_blk_write_time(), pg_stat_get_db_blocks_fetched(), pg_stat_get_db_blocks_hit(), pg_stat_get_db_checksum_failures(), pg_stat_get_db_checksum_last_failure(), pg_stat_get_db_conflict_all(), pg_stat_get_db_conflict_bufferpin(), pg_stat_get_db_conflict_lock(), pg_stat_get_db_conflict_snapshot(), pg_stat_get_db_conflict_startup_deadlock(), pg_stat_get_db_conflict_tablespace(), pg_stat_get_db_deadlocks(), pg_stat_get_db_stat_reset_time(), pg_stat_get_db_temp_bytes(), pg_stat_get_db_temp_files(), pg_stat_get_db_tuples_deleted(), pg_stat_get_db_tuples_fetched(), pg_stat_get_db_tuples_inserted(), pg_stat_get_db_tuples_returned(), pg_stat_get_db_tuples_updated(), pg_stat_get_db_xact_commit(), pg_stat_get_db_xact_rollback(), pgstat_fetch_stat_funcentry(), rebuild_database_list(), and table_recheck_autovac().

2433 {
2434  /*
2435  * If not done for this transaction, read the statistics collector stats
2436  * file into some hash tables.
2437  */
2439 
2440  /*
2441  * Lookup the requested database; return NULL if not found
2442  */
2444  (void *) &dbid,
2445  HASH_FIND, NULL);
2446 }
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
static void backend_read_statsfile(void)
Definition: pgstat.c:5642
static HTAB * pgStatDBHash
Definition: pgstat.c:244

◆ pgstat_fetch_stat_funcentry()

PgStat_StatFuncEntry* pgstat_fetch_stat_funcentry ( Oid  func_id)

Definition at line 2515 of file pgstat.c.

References backend_read_statsfile(), PgStat_StatDBEntry::functions, HASH_FIND, hash_search(), MyDatabaseId, and pgstat_fetch_stat_dbentry().

Referenced by pg_stat_get_function_calls(), pg_stat_get_function_self_time(), and pg_stat_get_function_total_time().

2516 {
2517  PgStat_StatDBEntry *dbentry;
2518  PgStat_StatFuncEntry *funcentry = NULL;
2519 
2520  /* load the stats file if needed */
2522 
2523  /* Lookup our database, then find the requested function. */
2525  if (dbentry != NULL && dbentry->functions != NULL)
2526  {
2527  funcentry = (PgStat_StatFuncEntry *) hash_search(dbentry->functions,
2528  (void *) &func_id,
2529  HASH_FIND, NULL);
2530  }
2531 
2532  return funcentry;
2533 }
HTAB * functions
Definition: pgstat.h:624
PgStat_StatDBEntry * pgstat_fetch_stat_dbentry(Oid dbid)
Definition: pgstat.c:2432
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
static void backend_read_statsfile(void)
Definition: pgstat.c:5642
Oid MyDatabaseId
Definition: globals.c:85

◆ pgstat_fetch_stat_local_beentry()

LocalPgBackendStatus* pgstat_fetch_stat_local_beentry ( int  beid)

Definition at line 2569 of file pgstat.c.

References localNumBackends, and pgstat_read_current_status().

Referenced by pg_stat_get_activity(), and pg_stat_get_progress_info().

2570 {
2572 
2573  if (beid < 1 || beid > localNumBackends)
2574  return NULL;
2575 
2576  return &localBackendStatusTable[beid - 1];
2577 }
static void pgstat_read_current_status(void)
Definition: pgstat.c:3350
static LocalPgBackendStatus * localBackendStatusTable
Definition: pgstat.c:247
static int localNumBackends
Definition: pgstat.c:250

◆ pgstat_fetch_stat_numbackends()

int pgstat_fetch_stat_numbackends ( void  )

Definition at line 2588 of file pgstat.c.

References localNumBackends, and pgstat_read_current_status().

Referenced by pg_stat_get_activity(), pg_stat_get_backend_idset(), pg_stat_get_db_numbackends(), and pg_stat_get_progress_info().

2589 {
2591 
2592  return localNumBackends;
2593 }
static void pgstat_read_current_status(void)
Definition: pgstat.c:3350
static int localNumBackends
Definition: pgstat.c:250

◆ pgstat_fetch_stat_tabentry()

PgStat_StatTabEntry* pgstat_fetch_stat_tabentry ( Oid  relid)

Definition at line 2459 of file pgstat.c.

References backend_read_statsfile(), HASH_FIND, hash_search(), InvalidOid, MyDatabaseId, and PgStat_StatDBEntry::tables.

Referenced by index_concurrently_swap(), pg_stat_get_analyze_count(), pg_stat_get_autoanalyze_count(), pg_stat_get_autovacuum_count(), pg_stat_get_blocks_fetched(), pg_stat_get_blocks_hit(), pg_stat_get_dead_tuples(), pg_stat_get_last_analyze_time(), pg_stat_get_last_autoanalyze_time(), pg_stat_get_last_autovacuum_time(), pg_stat_get_last_vacuum_time(), pg_stat_get_live_tuples(), pg_stat_get_mod_since_analyze(), pg_stat_get_numscans(), pg_stat_get_tuples_deleted(), pg_stat_get_tuples_fetched(), pg_stat_get_tuples_hot_updated(), pg_stat_get_tuples_inserted(), pg_stat_get_tuples_returned(), pg_stat_get_tuples_updated(), and pg_stat_get_vacuum_count().

2460 {
2461  Oid dbid;
2462  PgStat_StatDBEntry *dbentry;
2463  PgStat_StatTabEntry *tabentry;
2464 
2465  /*
2466  * If not done for this transaction, read the statistics collector stats
2467  * file into some hash tables.
2468  */
2470 
2471  /*
2472  * Lookup our database, then look in its table hash table.
2473  */
2474  dbid = MyDatabaseId;
2476  (void *) &dbid,
2477  HASH_FIND, NULL);
2478  if (dbentry != NULL && dbentry->tables != NULL)
2479  {
2480  tabentry = (PgStat_StatTabEntry *) hash_search(dbentry->tables,
2481  (void *) &relid,
2482  HASH_FIND, NULL);
2483  if (tabentry)
2484  return tabentry;
2485  }
2486 
2487  /*
2488  * If we didn't find it, maybe it's a shared table.
2489  */
2490  dbid = InvalidOid;
2492  (void *) &dbid,
2493  HASH_FIND, NULL);
2494  if (dbentry != NULL && dbentry->tables != NULL)
2495  {
2496  tabentry = (PgStat_StatTabEntry *) hash_search(dbentry->tables,
2497  (void *) &relid,
2498  HASH_FIND, NULL);
2499  if (tabentry)
2500  return tabentry;
2501  }
2502 
2503  return NULL;
2504 }
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
unsigned int Oid
Definition: postgres_ext.h:31
static void backend_read_statsfile(void)
Definition: pgstat.c:5642
Oid MyDatabaseId
Definition: globals.c:85
#define InvalidOid
Definition: postgres_ext.h:36
static HTAB * pgStatDBHash
Definition: pgstat.c:244

◆ pgstat_get_backend_current_activity()

const char* pgstat_get_backend_current_activity ( int  pid,
bool  checkUser 
)

Definition at line 4137 of file pgstat.c.

References BackendStatusArray, CHECK_FOR_INTERRUPTS, GetUserId(), i, MaxBackends, pgstat_begin_read_activity, pgstat_clip_activity(), pgstat_end_read_activity, pgstat_read_activity_complete, PgBackendStatus::st_activity_raw, PgBackendStatus::st_procpid, PgBackendStatus::st_userid, and superuser().

Referenced by DeadLockReport().

4138 {
4139  PgBackendStatus *beentry;
4140  int i;
4141 
4142  beentry = BackendStatusArray;
4143  for (i = 1; i <= MaxBackends; i++)
4144  {
4145  /*
4146  * Although we expect the target backend's entry to be stable, that
4147  * doesn't imply that anyone else's is. To avoid identifying the
4148  * wrong backend, while we check for a match to the desired PID we
4149  * must follow the protocol of retrying if st_changecount changes
4150  * while we examine the entry, or if it's odd. (This might be
4151  * unnecessary, since fetching or storing an int is almost certainly
4152  * atomic, but let's play it safe.) We use a volatile pointer here to
4153  * ensure the compiler doesn't try to get cute.
4154  */
4155  volatile PgBackendStatus *vbeentry = beentry;
4156  bool found;
4157 
4158  for (;;)
4159  {
4160  int before_changecount;
4161  int after_changecount;
4162 
4163  pgstat_begin_read_activity(vbeentry, before_changecount);
4164 
4165  found = (vbeentry->st_procpid == pid);
4166 
4167  pgstat_end_read_activity(vbeentry, after_changecount);
4168 
4169  if (pgstat_read_activity_complete(before_changecount,
4170  after_changecount))
4171  break;
4172 
4173  /* Make sure we can break out of loop if stuck... */
4175  }
4176 
4177  if (found)
4178  {
4179  /* Now it is safe to use the non-volatile pointer */
4180  if (checkUser && !superuser() && beentry->st_userid != GetUserId())
4181  return "<insufficient privilege>";
4182  else if (*(beentry->st_activity_raw) == '\0')
4183  return "<command string not enabled>";
4184  else
4185  {
4186  /* this'll leak a bit of memory, but that seems acceptable */
4187  return pgstat_clip_activity(beentry->st_activity_raw);
4188  }
4189  }
4190 
4191  beentry++;
4192  }
4193 
4194  /* If we get here, caller is in error ... */
4195  return "<backend information not available>";
4196 }
static PgBackendStatus * BackendStatusArray
Definition: pgstat.c:2634
Oid GetUserId(void)
Definition: miscinit.c:380
bool superuser(void)
Definition: superuser.c:47
int MaxBackends
Definition: globals.c:135
char * st_activity_raw
Definition: pgstat.h:1085
#define pgstat_end_read_activity(beentry, after_changecount)
Definition: pgstat.h:1151
#define pgstat_begin_read_activity(beentry, before_changecount)
Definition: pgstat.h:1145
char * pgstat_clip_activity(const char *raw_activity)
Definition: pgstat.c:6544
int i
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:99
#define pgstat_read_activity_complete(before_changecount, after_changecount)
Definition: pgstat.h:1157

◆ pgstat_get_backend_desc()

const char* pgstat_get_backend_desc ( BackendType  backendType)

Definition at line 4274 of file pgstat.c.

References B_AUTOVAC_LAUNCHER, B_AUTOVAC_WORKER, B_BACKEND, B_BG_WORKER, B_BG_WRITER, B_CHECKPOINTER, B_STARTUP, B_WAL_RECEIVER, B_WAL_SENDER, and B_WAL_WRITER.

Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), AuxiliaryProcessMain(), BackendInitialize(), and pg_stat_get_activity().

4275 {
4276  const char *backendDesc = "unknown process type";
4277 
4278  switch (backendType)
4279  {
4280  case B_AUTOVAC_LAUNCHER:
4281  backendDesc = "autovacuum launcher";
4282  break;
4283  case B_AUTOVAC_WORKER:
4284  backendDesc = "autovacuum worker";
4285  break;
4286  case B_BACKEND:
4287  backendDesc = "client backend";
4288  break;
4289  case B_BG_WORKER:
4290  backendDesc = "background worker";
4291  break;
4292  case B_BG_WRITER:
4293  backendDesc = "background writer";
4294  break;
4295  case B_CHECKPOINTER:
4296  backendDesc = "checkpointer";
4297  break;
4298  case B_STARTUP:
4299  backendDesc = "startup";
4300  break;
4301  case B_WAL_RECEIVER:
4302  backendDesc = "walreceiver";
4303  break;
4304  case B_WAL_SENDER:
4305  backendDesc = "walsender";
4306  break;
4307  case B_WAL_WRITER:
4308  backendDesc = "walwriter";
4309  break;
4310  }
4311 
4312  return backendDesc;
4313 }

◆ pgstat_get_crashed_backend_activity()

const char* pgstat_get_crashed_backend_activity ( int  pid,
char *  buffer,
int  buflen 
)

Definition at line 4215 of file pgstat.c.

References ascii_safe_strlcpy(), BackendActivityBuffer, BackendActivityBufferSize, BackendStatusArray, i, MaxBackends, Min, pgstat_track_activity_query_size, PgBackendStatus::st_activity_raw, and PgBackendStatus::st_procpid.

Referenced by LogChildExit().

4216 {
4217  volatile PgBackendStatus *beentry;
4218  int i;
4219 
4220  beentry = BackendStatusArray;
4221 
4222  /*
4223  * We probably shouldn't get here before shared memory has been set up,
4224  * but be safe.
4225  */
4226  if (beentry == NULL || BackendActivityBuffer == NULL)
4227  return NULL;
4228 
4229  for (i = 1; i <= MaxBackends; i++)
4230  {
4231  if (beentry->st_procpid == pid)
4232  {
4233  /* Read pointer just once, so it can't change after validation */
4234  const char *activity = beentry->st_activity_raw;
4235  const char *activity_last;
4236 
4237  /*
4238  * We mustn't access activity string before we verify that it
4239  * falls within the BackendActivityBuffer. To make sure that the
4240  * entire string including its ending is contained within the
4241  * buffer, subtract one activity length from the buffer size.
4242  */
4245 
4246  if (activity < BackendActivityBuffer ||
4247  activity > activity_last)
4248  return NULL;
4249 
4250  /* If no string available, no point in a report */
4251  if (activity[0] == '\0')
4252  return NULL;
4253 
4254  /*
4255  * Copy only ASCII-safe characters so we don't run into encoding
4256  * problems when reporting the message; and be sure not to run off
4257  * the end of memory. As only ASCII characters are reported, it
4258  * doesn't seem necessary to perform multibyte aware clipping.
4259  */
4260  ascii_safe_strlcpy(buffer, activity,
4261  Min(buflen, pgstat_track_activity_query_size));
4262 
4263  return buffer;
4264  }
4265 
4266  beentry++;
4267  }
4268 
4269  /* PID not found */
4270  return NULL;
4271 }
static PgBackendStatus * BackendStatusArray
Definition: pgstat.c:2634
static char * BackendActivityBuffer
Definition: pgstat.c:2638
#define Min(x, y)
Definition: c.h:904
static Size BackendActivityBufferSize
Definition: pgstat.c:2639
void ascii_safe_strlcpy(char *dest, const char *src, size_t destsiz)
Definition: ascii.c:173
int MaxBackends
Definition: globals.c:135
char * st_activity_raw
Definition: pgstat.h:1085
int pgstat_track_activity_query_size
Definition: pgstat.c:128
int i

◆ pgstat_get_db_entry()

static PgStat_StatDBEntry * pgstat_get_db_entry ( Oid  databaseid,
bool  create 
)
static

Definition at line 4766 of file pgstat.c.

References generate_unaccent_rules::action, HASH_ENTER, HASH_FIND, hash_search(), and reset_dbentry_counters().

Referenced by pgstat_recv_analyze(), pgstat_recv_autovac(), pgstat_recv_checksum_failure(), pgstat_recv_deadlock(), pgstat_recv_dropdb(), pgstat_recv_funcpurge(), pgstat_recv_funcstat(), pgstat_recv_inquiry(), pgstat_recv_recoveryconflict(), pgstat_recv_resetcounter(), pgstat_recv_resetsinglecounter(), pgstat_recv_tabpurge(), pgstat_recv_tabstat(), pgstat_recv_tempfile(), and pgstat_recv_vacuum().

4767 {
4768  PgStat_StatDBEntry *result;
4769  bool found;
4770  HASHACTION action = (create ? HASH_ENTER : HASH_FIND);
4771 
4772  /* Lookup or create the hash table entry for this database */
4774  &databaseid,
4775  action, &found);
4776 
4777  if (!create && !found)
4778  return NULL;
4779 
4780  /*
4781  * If not found, initialize the new one. This creates empty hash tables
4782  * for tables and functions, too.
4783  */
4784  if (!found)
4785  reset_dbentry_counters(result);
4786 
4787  return result;
4788 }
static void reset_dbentry_counters(PgStat_StatDBEntry *dbentry)
Definition: pgstat.c:4714
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
static HTAB * pgStatDBHash
Definition: pgstat.c:244
HASHACTION
Definition: hsearch.h:103

◆ pgstat_get_tab_entry()

static PgStat_StatTabEntry * pgstat_get_tab_entry ( PgStat_StatDBEntry dbentry,
Oid  tableoid,
bool  create 
)
static

Definition at line 4797 of file pgstat.c.

References generate_unaccent_rules::action, PgStat_StatTabEntry::analyze_count, PgStat_StatTabEntry::analyze_timestamp, PgStat_StatTabEntry::autovac_analyze_count, PgStat_StatTabEntry::autovac_analyze_timestamp, PgStat_StatTabEntry::autovac_vacuum_count, PgStat_StatTabEntry::autovac_vacuum_timestamp, PgStat_StatTabEntry::blocks_fetched, PgStat_StatTabEntry::blocks_hit, PgStat_StatTabEntry::changes_since_analyze, HASH_ENTER, HASH_FIND, hash_search(), PgStat_StatTabEntry::n_dead_tuples, PgStat_StatTabEntry::n_live_tuples, PgStat_StatTabEntry::numscans, PgStat_StatDBEntry::tables, PgStat_StatTabEntry::tuples_deleted, PgStat_StatTabEntry::tuples_fetched, PgStat_StatTabEntry::tuples_hot_updated, PgStat_StatTabEntry::tuples_inserted, PgStat_StatTabEntry::tuples_returned, PgStat_StatTabEntry::tuples_updated, PgStat_StatTabEntry::vacuum_count, and PgStat_StatTabEntry::vacuum_timestamp.

Referenced by pgstat_recv_analyze(), and pgstat_recv_vacuum().

4798 {
4799  PgStat_StatTabEntry *result;
4800  bool found;
4801  HASHACTION action = (create ? HASH_ENTER : HASH_FIND);
4802 
4803  /* Lookup or create the hash table entry for this table */
4804  result = (PgStat_StatTabEntry *) hash_search(dbentry->tables,
4805  &tableoid,
4806  action, &found);
4807 
4808  if (!create && !found)
4809  return NULL;
4810 
4811  /* If not found, initialize the new one. */
4812  if (!found)
4813  {
4814  result->numscans = 0;
4815  result->tuples_returned = 0;
4816  result->tuples_fetched = 0;
4817  result->tuples_inserted = 0;
4818  result->tuples_updated = 0;
4819  result->tuples_deleted = 0;
4820  result->tuples_hot_updated = 0;
4821  result->n_live_tuples = 0;
4822  result->n_dead_tuples = 0;
4823  result->changes_since_analyze = 0;
4824  result->blocks_fetched = 0;
4825  result->blocks_hit = 0;
4826  result->vacuum_timestamp = 0;
4827  result->vacuum_count = 0;
4828  result->autovac_vacuum_timestamp = 0;
4829  result->autovac_vacuum_count = 0;
4830  result->analyze_timestamp = 0;
4831  result->analyze_count = 0;
4832  result->autovac_analyze_timestamp = 0;
4833  result->autovac_analyze_count = 0;
4834  }
4835 
4836  return result;
4837 }
PgStat_Counter analyze_count
Definition: pgstat.h:658
PgStat_Counter tuples_returned
Definition: pgstat.h:638
TimestampTz autovac_analyze_timestamp
Definition: pgstat.h:659
PgStat_Counter vacuum_count
Definition: pgstat.h:654
PgStat_Counter numscans
Definition: pgstat.h:636
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
PgStat_Counter tuples_hot_updated
Definition: pgstat.h:644
PgStat_Counter tuples_inserted
Definition: pgstat.h:641
PgStat_Counter n_live_tuples
Definition: pgstat.h:646
TimestampTz vacuum_timestamp
Definition: pgstat.h:653
PgStat_Counter n_dead_tuples
Definition: pgstat.h:647
PgStat_Counter tuples_fetched
Definition: pgstat.h:639
PgStat_Counter blocks_hit
Definition: pgstat.h:651
TimestampTz analyze_timestamp
Definition: pgstat.h:657
PgStat_Counter changes_since_analyze
Definition: pgstat.h:648
PgStat_Counter tuples_deleted
Definition: pgstat.h:643
PgStat_Counter tuples_updated
Definition: pgstat.h:642
TimestampTz autovac_vacuum_timestamp
Definition: pgstat.h:655
PgStat_Counter autovac_analyze_count
Definition: pgstat.h:660
PgStat_Counter blocks_fetched
Definition: pgstat.h:650
HASHACTION
Definition: hsearch.h:103
PgStat_Counter autovac_vacuum_count
Definition: pgstat.h:656

◆ pgstat_get_wait_activity()

static const char * pgstat_get_wait_activity ( WaitEventActivity  w)
static

Definition at line 3634 of file pgstat.c.

References WAIT_EVENT_ARCHIVER_MAIN, WAIT_EVENT_AUTOVACUUM_MAIN, WAIT_EVENT_BGWRITER_HIBERNATE, WAIT_EVENT_BGWRITER_MAIN, WAIT_EVENT_CHECKPOINTER_MAIN, WAIT_EVENT_LOGICAL_APPLY_MAIN, WAIT_EVENT_LOGICAL_LAUNCHER_MAIN, WAIT_EVENT_PGSTAT_MAIN, WAIT_EVENT_RECOVERY_WAL_ALL, WAIT_EVENT_RECOVERY_WAL_STREAM, WAIT_EVENT_SYSLOGGER_MAIN, WAIT_EVENT_WAL_RECEIVER_MAIN, WAIT_EVENT_WAL_SENDER_MAIN, and WAIT_EVENT_WAL_WRITER_MAIN.

Referenced by pgstat_get_wait_event().

3635 {
3636  const char *event_name = "unknown wait event";
3637 
3638  switch (w)
3639  {
3641  event_name = "ArchiverMain";
3642  break;
3644  event_name = "AutoVacuumMain";
3645  break;
3647  event_name = "BgWriterHibernate";
3648  break;
3650  event_name = "BgWriterMain";
3651  break;
3653  event_name = "CheckpointerMain";
3654  break;
3656  event_name = "LogicalApplyMain";
3657  break;
3659  event_name = "LogicalLauncherMain";
3660  break;
3662  event_name = "PgStatMain";
3663  break;
3665  event_name = "RecoveryWalAll";
3666  break;
3668  event_name = "RecoveryWalStream";
3669  break;
3671  event_name = "SysLoggerMain";
3672  break;
3674  event_name = "WalReceiverMain";
3675  break;
3677  event_name = "WalSenderMain";
3678  break;
3680  event_name = "WalWriterMain";
3681  break;
3682  /* no default case, so that compiler will warn */
3683  }
3684 
3685  return event_name;
3686 }

◆ pgstat_get_wait_client()

static const char * pgstat_get_wait_client ( WaitEventClient  w)
static

Definition at line 3695 of file pgstat.c.

References WAIT_EVENT_CLIENT_READ, WAIT_EVENT_CLIENT_WRITE, WAIT_EVENT_GSS_OPEN_SERVER, WAIT_EVENT_LIBPQWALRECEIVER_CONNECT, WAIT_EVENT_LIBPQWALRECEIVER_RECEIVE, WAIT_EVENT_SSL_OPEN_SERVER, WAIT_EVENT_WAL_RECEIVER_WAIT_START, WAIT_EVENT_WAL_SENDER_WAIT_WAL, and WAIT_EVENT_WAL_SENDER_WRITE_DATA.

Referenced by pgstat_get_wait_event().

3696 {
3697  const char *event_name = "unknown wait event";
3698 
3699  switch (w)
3700  {
3702  event_name = "ClientRead";
3703  break;
3705  event_name = "ClientWrite";
3706  break;
3708  event_name = "LibPQWalReceiverConnect";
3709  break;
3711  event_name = "LibPQWalReceiverReceive";
3712  break;
3714  event_name = "SSLOpenServer";
3715  break;
3717  event_name = "WalReceiverWaitStart";
3718  break;
3720  event_name = "WalSenderWaitForWAL";
3721  break;
3723  event_name = "WalSenderWriteData";
3724  break;
3726  event_name = "GSSOpenServer";
3727  break;
3728  /* no default case, so that compiler will warn */
3729  }
3730 
3731  return event_name;
3732 }

◆ pgstat_get_wait_event()

const char* pgstat_get_wait_event ( uint32  wait_event_info)

Definition at line 3557 of file pgstat.c.

References GetLockNameFromTagType(), GetLWLockIdentifier(), PG_WAIT_ACTIVITY, PG_WAIT_BUFFER_PIN, PG_WAIT_CLIENT, PG_WAIT_EXTENSION, PG_WAIT_IO, PG_WAIT_IPC, PG_WAIT_LOCK, PG_WAIT_LWLOCK, PG_WAIT_TIMEOUT, pgstat_get_wait_activity(), pgstat_get_wait_client(), pgstat_get_wait_io(), pgstat_get_wait_ipc(), and pgstat_get_wait_timeout().

Referenced by pg_stat_get_activity(), and pg_stat_get_backend_wait_event().

3558 {
3559  uint32 classId;
3560  uint16 eventId;
3561  const char *event_name;
3562 
3563  /* report process as not waiting. */
3564  if (wait_event_info == 0)
3565  return NULL;
3566 
3567  classId = wait_event_info & 0xFF000000;
3568  eventId = wait_event_info & 0x0000FFFF;
3569 
3570  switch (classId)
3571  {
3572  case PG_WAIT_LWLOCK:
3573  event_name = GetLWLockIdentifier(classId, eventId);
3574  break;
3575  case PG_WAIT_LOCK:
3576  event_name = GetLockNameFromTagType(eventId);
3577  break;
3578  case PG_WAIT_BUFFER_PIN:
3579  event_name = "BufferPin";
3580  break;
3581  case PG_WAIT_ACTIVITY:
3582  {
3583  WaitEventActivity w = (WaitEventActivity) wait_event_info;
3584 
3585  event_name = pgstat_get_wait_activity(w);
3586  break;
3587  }
3588  case PG_WAIT_CLIENT:
3589  {
3590  WaitEventClient w = (WaitEventClient) wait_event_info;
3591 
3592  event_name = pgstat_get_wait_client(w);
3593  break;
3594  }
3595  case PG_WAIT_EXTENSION:
3596  event_name = "Extension";
3597  break;
3598  case PG_WAIT_IPC:
3599  {
3600  WaitEventIPC w = (WaitEventIPC) wait_event_info;
3601 
3602  event_name = pgstat_get_wait_ipc(w);
3603  break;
3604  }
3605  case PG_WAIT_TIMEOUT:
3606  {
3607  WaitEventTimeout w = (WaitEventTimeout) wait_event_info;
3608 
3609  event_name = pgstat_get_wait_timeout(w);
3610  break;
3611  }
3612  case PG_WAIT_IO:
3613  {
3614  WaitEventIO w = (WaitEventIO) wait_event_info;
3615 
3616  event_name = pgstat_get_wait_io(w);
3617  break;
3618  }
3619  default:
3620  event_name = "unknown wait event";
3621  break;
3622  }
3623 
3624  return event_name;
3625 }
#define PG_WAIT_LOCK
Definition: pgstat.h:755
WaitEventIPC
Definition: pgstat.h:818
static const char * pgstat_get_wait_timeout(WaitEventTimeout w)
Definition: pgstat.c:3871
static const char * pgstat_get_wait_ipc(WaitEventIPC w)
Definition: pgstat.c:3741
#define PG_WAIT_ACTIVITY
Definition: pgstat.h:757
#define PG_WAIT_IO
Definition: pgstat.h:762
static const char * pgstat_get_wait_activity(WaitEventActivity w)
Definition: pgstat.c:3634
unsigned short uint16
Definition: c.h:357
#define PG_WAIT_CLIENT
Definition: pgstat.h:758
WaitEventClient
Definition: pgstat.h:798
static const char * pgstat_get_wait_client(WaitEventClient w)
Definition: pgstat.c:3695
unsigned int uint32
Definition: c.h:358
WaitEventTimeout
Definition: pgstat.h:865
#define PG_WAIT_EXTENSION
Definition: pgstat.h:759
#define PG_WAIT_BUFFER_PIN
Definition: pgstat.h:756
const char * GetLockNameFromTagType(uint16 locktag_type)
Definition: lmgr.c:1172
WaitEventIO
Definition: pgstat.h:878
#define PG_WAIT_TIMEOUT
Definition: pgstat.h:761
#define PG_WAIT_IPC
Definition: pgstat.h:760
const char * GetLWLockIdentifier(uint32 classId, uint16 eventId)
Definition: lwlock.c:714
static const char * pgstat_get_wait_io(WaitEventIO w)
Definition: pgstat.c:3899
#define PG_WAIT_LWLOCK
Definition: pgstat.h:754
WaitEventActivity
Definition: pgstat.h:772

◆ pgstat_get_wait_event_type()

const char* pgstat_get_wait_event_type ( uint32  wait_event_info)

Definition at line 3502 of file pgstat.c.

References PG_WAIT_ACTIVITY, PG_WAIT_BUFFER_PIN, PG_WAIT_CLIENT, PG_WAIT_EXTENSION, PG_WAIT_IO, PG_WAIT_IPC, PG_WAIT_LOCK, PG_WAIT_LWLOCK, and PG_WAIT_TIMEOUT.

Referenced by pg_stat_get_activity(), and pg_stat_get_backend_wait_event_type().

3503 {
3504  uint32 classId;
3505  const char *event_type;
3506 
3507  /* report process as not waiting. */
3508  if (wait_event_info == 0)
3509  return NULL;
3510 
3511  classId = wait_event_info & 0xFF000000;
3512 
3513  switch (classId)
3514  {
3515  case PG_WAIT_LWLOCK:
3516  event_type = "LWLock";
3517  break;
3518  case PG_WAIT_LOCK:
3519  event_type = "Lock";
3520  break;
3521  case PG_WAIT_BUFFER_PIN:
3522  event_type = "BufferPin";
3523  break;
3524  case PG_WAIT_ACTIVITY:
3525  event_type = "Activity";
3526  break;
3527  case PG_WAIT_CLIENT:
3528  event_type = "Client";
3529  break;
3530  case PG_WAIT_EXTENSION:
3531  event_type = "Extension";
3532  break;
3533  case PG_WAIT_IPC:
3534  event_type = "IPC";
3535  break;
3536  case PG_WAIT_TIMEOUT:
3537  event_type = "Timeout";
3538  break;
3539  case PG_WAIT_IO:
3540  event_type = "IO";
3541  break;
3542  default:
3543  event_type = "???";
3544  break;
3545  }
3546 
3547  return event_type;
3548 }
#define PG_WAIT_LOCK
Definition: pgstat.h:755
#define PG_WAIT_ACTIVITY
Definition: pgstat.h:757
#define PG_WAIT_IO
Definition: pgstat.h:762
#define PG_WAIT_CLIENT
Definition: pgstat.h:758
unsigned int uint32
Definition: c.h:358
#define PG_WAIT_EXTENSION
Definition: pgstat.h:759
#define PG_WAIT_BUFFER_PIN
Definition: pgstat.h:756
#define PG_WAIT_TIMEOUT
Definition: pgstat.h:761
#define PG_WAIT_IPC
Definition: pgstat.h:760
#define PG_WAIT_LWLOCK
Definition: pgstat.h:754

◆ pgstat_get_wait_io()

static const char * pgstat_get_wait_io ( WaitEventIO  w)
static

Definition at line 3899 of file pgstat.c.

References WAIT_EVENT_BUFFILE_READ, WAIT_EVENT_BUFFILE_WRITE, WAIT_EVENT_CONTROL_FILE_READ, WAIT_EVENT_CONTROL_FILE_SYNC, WAIT_EVENT_CONTROL_FILE_SYNC_UPDATE, WAIT_EVENT_CONTROL_FILE_WRITE, WAIT_EVENT_CONTROL_FILE_WRITE_UPDATE, WAIT_EVENT_COPY_FILE_READ, WAIT_EVENT_COPY_FILE_WRITE, WAIT_EVENT_DATA_FILE_EXTEND, WAIT_EVENT_DATA_FILE_FLUSH, WAIT_EVENT_DATA_FILE_IMMEDIATE_SYNC, WAIT_EVENT_DATA_FILE_PREFETCH, WAIT_EVENT_DATA_FILE_READ, WAIT_EVENT_DATA_FILE_SYNC, WAIT_EVENT_DATA_FILE_TRUNCATE, WAIT_EVENT_DATA_FILE_WRITE, WAIT_EVENT_DSM_FILL_ZERO_WRITE, WAIT_EVENT_LOCK_FILE_ADDTODATADIR_READ, WAIT_EVENT_LOCK_FILE_ADDTODATADIR_SYNC, WAIT_EVENT_LOCK_FILE_ADDTODATADIR_WRITE, WAIT_EVENT_LOCK_FILE_CREATE_READ, WAIT_EVENT_LOCK_FILE_CREATE_SYNC, WAIT_EVENT_LOCK_FILE_CREATE_WRITE, WAIT_EVENT_LOCK_FILE_RECHECKDATADIR_READ, WAIT_EVENT_LOGICAL_REWRITE_CHECKPOINT_SYNC, WAIT_EVENT_LOGICAL_REWRITE_MAPPING_SYNC, WAIT_EVENT_LOGICAL_REWRITE_MAPPING_WRITE, WAIT_EVENT_LOGICAL_REWRITE_SYNC, WAIT_EVENT_LOGICAL_REWRITE_TRUNCATE, WAIT_EVENT_LOGICAL_REWRITE_WRITE, WAIT_EVENT_RELATION_MAP_READ, WAIT_EVENT_RELATION_MAP_SYNC, WAIT_EVENT_RELATION_MAP_WRITE, WAIT_EVENT_REORDER_BUFFER_READ, WAIT_EVENT_REORDER_BUFFER_WRITE, WAIT_EVENT_REORDER_LOGICAL_MAPPING_READ, WAIT_EVENT_REPLICATION_SLOT_READ, WAIT_EVENT_REPLICATION_SLOT_RESTORE_SYNC, WAIT_EVENT_REPLICATION_SLOT_SYNC, WAIT_EVENT_REPLICATION_SLOT_WRITE, WAIT_EVENT_SLRU_FLUSH_SYNC, WAIT_EVENT_SLRU_READ, WAIT_EVENT_SLRU_SYNC, WAIT_EVENT_SLRU_WRITE, WAIT_EVENT_SNAPBUILD_READ, WAIT_EVENT_SNAPBUILD_SYNC, WAIT_EVENT_SNAPBUILD_WRITE, WAIT_EVENT_TIMELINE_HISTORY_FILE_SYNC, WAIT_EVENT_TIMELINE_HISTORY_FILE_WRITE, WAIT_EVENT_TIMELINE_HISTORY_READ, WAIT_EVENT_TIMELINE_HISTORY_SYNC, WAIT_EVENT_TIMELINE_HISTORY_WRITE, WAIT_EVENT_TWOPHASE_FILE_READ, WAIT_EVENT_TWOPHASE_FILE_SYNC, WAIT_EVENT_TWOPHASE_FILE_WRITE, WAIT_EVENT_WAL_BOOTSTRAP_SYNC, WAIT_EVENT_WAL_BOOTSTRAP_WRITE, WAIT_EVENT_WAL_COPY_READ, WAIT_EVENT_WAL_COPY_SYNC, WAIT_EVENT_WAL_COPY_WRITE, WAIT_EVENT_WAL_INIT_SYNC, WAIT_EVENT_WAL_INIT_WRITE, WAIT_EVENT_WAL_READ, WAIT_EVENT_WAL_SYNC, WAIT_EVENT_WAL_SYNC_METHOD_ASSIGN, WAIT_EVENT_WAL_WRITE, and WAIT_EVENT_WALSENDER_TIMELINE_HISTORY_READ.

Referenced by pgstat_get_wait_event().

3900 {
3901  const char *event_name = "unknown wait event";
3902 
3903  switch (w)
3904  {
3906  event_name = "BufFileRead";
3907  break;
3909  event_name = "BufFileWrite";
3910  break;
3912  event_name = "ControlFileRead";
3913  break;
3915  event_name = "ControlFileSync";
3916  break;
3918  event_name = "ControlFileSyncUpdate";
3919  break;
3921  event_name = "ControlFileWrite";
3922  break;
3924  event_name = "ControlFileWriteUpdate";
3925  break;
3927  event_name = "CopyFileRead";
3928  break;
3930  event_name = "CopyFileWrite";
3931  break;
3933  event_name = "DataFileExtend";
3934  break;
3936  event_name = "DataFileFlush";
3937  break;
3939  event_name = "DataFileImmediateSync";
3940  break;
3942  event_name = "DataFilePrefetch";
3943  break;
3945  event_name = "DataFileRead";
3946  break;
3948  event_name = "DataFileSync";
3949  break;
3951  event_name = "DataFileTruncate";
3952  break;
3954  event_name = "DataFileWrite";
3955  break;
3957  event_name = "DSMFillZeroWrite";
3958  break;
3960  event_name = "LockFileAddToDataDirRead";
3961  break;
3963  event_name = "LockFileAddToDataDirSync";
3964  break;
3966  event_name = "LockFileAddToDataDirWrite";
3967  break;
3969  event_name = "LockFileCreateRead";
3970  break;
3972  event_name = "LockFileCreateSync";
3973  break;
3975  event_name = "LockFileCreateWrite";
3976  break;
3978  event_name = "LockFileReCheckDataDirRead";
3979  break;
3981  event_name = "LogicalRewriteCheckpointSync";
3982  break;
3984  event_name = "LogicalRewriteMappingSync";
3985  break;
3987  event_name = "LogicalRewriteMappingWrite";
3988  break;
3990  event_name = "LogicalRewriteSync";
3991  break;
3993  event_name = "LogicalRewriteTruncate";
3994  break;
3996  event_name = "LogicalRewriteWrite";
3997  break;
3999  event_name = "RelationMapRead";
4000  break;
4002  event_name = "RelationMapSync";
4003  break;
4005  event_name = "RelationMapWrite";
4006  break;
4008  event_name = "ReorderBufferRead";
4009  break;
4011  event_name = "ReorderBufferWrite";
4012  break;
4014  event_name = "ReorderLogicalMappingRead";
4015  break;
4017  event_name = "ReplicationSlotRead";
4018  break;
4020  event_name = "ReplicationSlotRestoreSync";
4021  break;
4023  event_name = "ReplicationSlotSync";
4024  break;
4026  event_name = "ReplicationSlotWrite";
4027  break;
4029  event_name = "SLRUFlushSync";
4030  break;
4031  case WAIT_EVENT_SLRU_READ:
4032  event_name = "SLRURead";
4033  break;
4034  case WAIT_EVENT_SLRU_SYNC:
4035  event_name = "SLRUSync";
4036  break;
4037  case WAIT_EVENT_SLRU_WRITE:
4038  event_name = "SLRUWrite";
4039  break;
4041  event_name = "SnapbuildRead";
4042  break;
4044  event_name = "SnapbuildSync";
4045  break;
4047  event_name = "SnapbuildWrite";
4048  break;
4050  event_name = "TimelineHistoryFileSync";
4051  break;
4053  event_name = "TimelineHistoryFileWrite";
4054  break;
4056  event_name = "TimelineHistoryRead";
4057  break;
4059  event_name = "TimelineHistorySync";
4060  break;
4062  event_name = "TimelineHistoryWrite";
4063  break;
4065  event_name = "TwophaseFileRead";
4066  break;
4068  event_name = "TwophaseFileSync";
4069  break;
4071  event_name = "TwophaseFileWrite";
4072  break;
4074  event_name = "WALSenderTimelineHistoryRead";
4075  break;
4077  event_name = "WALBootstrapSync";
4078  break;
4080  event_name = "WALBootstrapWrite";
4081  break;
4083  event_name = "WALCopyRead";
4084  break;
4086  event_name = "WALCopySync";
4087  break;
4089  event_name = "WALCopyWrite";
4090  break;
4092  event_name = "WALInitSync";
4093  break;
4095  event_name = "WALInitWrite";
4096  break;
4097  case WAIT_EVENT_WAL_READ:
4098  event_name = "WALRead";
4099  break;
4100  case WAIT_EVENT_WAL_SYNC:
4101  event_name = "WALSync";
4102  break;
4104  event_name = "WALSyncMethodAssign";
4105  break;
4106  case WAIT_EVENT_WAL_WRITE:
4107  event_name = "WALWrite";
4108  break;
4109 
4110  /* no default case, so that compiler will warn */
4111  }
4112 
4113  return event_name;
4114 }

◆ pgstat_get_wait_ipc()

static const char * pgstat_get_wait_ipc ( WaitEventIPC  w)
static

Definition at line 3741 of file pgstat.c.

References WAIT_EVENT_BGWORKER_SHUTDOWN, WAIT_EVENT_BGWORKER_STARTUP, WAIT_EVENT_BTREE_PAGE, WAIT_EVENT_CHECKPOINT_DONE, WAIT_EVENT_CHECKPOINT_START, WAIT_EVENT_CLOG_GROUP_UPDATE, WAIT_EVENT_EXECUTE_GATHER, WAIT_EVENT_HASH_BATCH_ALLOCATING, WAIT_EVENT_HASH_BATCH_ELECTING, WAIT_EVENT_HASH_BATCH_LOADING, WAIT_EVENT_HASH_BUILD_ALLOCATING, WAIT_EVENT_HASH_BUILD_ELECTING, WAIT_EVENT_HASH_BUILD_HASHING_INNER, WAIT_EVENT_HASH_BUILD_HASHING_OUTER, WAIT_EVENT_HASH_GROW_BATCHES_ALLOCATING, WAIT_EVENT_HASH_GROW_BATCHES_DECIDING, WAIT_EVENT_HASH_GROW_BATCHES_ELECTING, WAIT_EVENT_HASH_GROW_BATCHES_FINISHING, WAIT_EVENT_HASH_GROW_BATCHES_REPARTITIONING, WAIT_EVENT_HASH_GROW_BUCKETS_ALLOCATING, WAIT_EVENT_HASH_GROW_BUCKETS_ELECTING, WAIT_EVENT_HASH_GROW_BUCKETS_REINSERTING, WAIT_EVENT_LOGICAL_SYNC_DATA, WAIT_EVENT_LOGICAL_SYNC_STATE_CHANGE, WAIT_EVENT_MQ_INTERNAL, WAIT_EVENT_MQ_PUT_MESSAGE, WAIT_EVENT_MQ_RECEIVE, WAIT_EVENT_MQ_SEND, WAIT_EVENT_PARALLEL_BITMAP_SCAN, WAIT_EVENT_PARALLEL_CREATE_INDEX_SCAN, WAIT_EVENT_PARALLEL_FINISH, WAIT_EVENT_PROCARRAY_GROUP_UPDATE, WAIT_EVENT_PROMOTE, WAIT_EVENT_REPLICATION_ORIGIN_DROP, WAIT_EVENT_REPLICATION_SLOT_DROP, WAIT_EVENT_SAFE_SNAPSHOT, and WAIT_EVENT_SYNC_REP.

Referenced by pgstat_get_wait_event().

3742 {
3743  const char *event_name = "unknown wait event";
3744 
3745  switch (w)
3746  {
3748  event_name = "BgWorkerShutdown";
3749  break;
3751  event_name = "BgWorkerStartup";
3752  break;
3753  case WAIT_EVENT_BTREE_PAGE:
3754  event_name = "BtreePage";
3755  break;
3757  event_name = "CheckpointDone";
3758  break;
3760  event_name = "CheckpointStart";
3761  break;
3763  event_name = "ClogGroupUpdate";
3764  break;
3766  event_name = "ExecuteGather";
3767  break;
3769  event_name = "Hash/Batch/Allocating";
3770  break;
3772  event_name = "Hash/Batch/Electing";
3773  break;
3775  event_name = "Hash/Batch/Loading";
3776  break;
3778  event_name = "Hash/Build/Allocating";
3779  break;
3781  event_name = "Hash/Build/Electing";
3782  break;
3784  event_name = "Hash/Build/HashingInner";
3785  break;
3787  event_name = "Hash/Build/HashingOuter";
3788  break;
3790  event_name = "Hash/GrowBatches/Allocating";
3791  break;
3793  event_name = "Hash/GrowBatches/Deciding";
3794  break;
3796  event_name = "Hash/GrowBatches/Electing";
3797  break;
3799  event_name = "Hash/GrowBatches/Finishing";
3800  break;
3802  event_name = "Hash/GrowBatches/Repartitioning";
3803  break;
3805  event_name = "Hash/GrowBuckets/Allocating";
3806  break;
3808  event_name = "Hash/GrowBuckets/Electing";
3809  break;
3811  event_name = "Hash/GrowBuckets/Reinserting";
3812  break;
3814  event_name = "LogicalSyncData";
3815  break;
3817  event_name = "LogicalSyncStateChange";
3818  break;
3820  event_name = "MessageQueueInternal";
3821  break;
3823  event_name = "MessageQueuePutMessage";
3824  break;
3825  case WAIT_EVENT_MQ_RECEIVE:
3826  event_name = "MessageQueueReceive";
3827  break;
3828  case WAIT_EVENT_MQ_SEND:
3829  event_name = "MessageQueueSend";
3830  break;
3832  event_name = "ParallelBitmapScan";
3833  break;
3835  event_name = "ParallelCreateIndexScan";
3836  break;
3838  event_name = "ParallelFinish";
3839  break;
3841  event_name = "ProcArrayGroupUpdate";
3842  break;
3843  case WAIT_EVENT_PROMOTE:
3844  event_name = "Promote";
3845  break;
3847  event_name = "ReplicationOriginDrop";
3848  break;
3850  event_name = "ReplicationSlotDrop";
3851  break;
3853  event_name = "SafeSnapshot";
3854  break;
3855  case WAIT_EVENT_SYNC_REP:
3856  event_name = "SyncRep";
3857  break;
3858  /* no default case, so that compiler will warn */
3859  }
3860 
3861  return event_name;
3862 }

◆ pgstat_get_wait_timeout()

static const char * pgstat_get_wait_timeout ( WaitEventTimeout  w)
static

Definition at line 3871 of file pgstat.c.

References WAIT_EVENT_BASE_BACKUP_THROTTLE, WAIT_EVENT_PG_SLEEP, and WAIT_EVENT_RECOVERY_APPLY_DELAY.

Referenced by pgstat_get_wait_event().

3872 {
3873  const char *event_name = "unknown wait event";
3874 
3875  switch (w)
3876  {
3878  event_name = "BaseBackupThrottle";
3879  break;
3880  case WAIT_EVENT_PG_SLEEP:
3881  event_name = "PgSleep";
3882  break;
3884  event_name = "RecoveryApplyDelay";
3885  break;
3886  /* no default case, so that compiler will warn */
3887  }
3888 
3889  return event_name;
3890 }

◆ pgstat_init()

void pgstat_init ( void  )

Definition at line 356 of file pgstat.c.

References addrinfo::ai_next, AI_PASSIVE, bind, closesocket, connect, EINTR, elog, ereport, errcode(), errcode_for_socket_access(), errmsg(), gai_strerror, LOG, pg_freeaddrinfo_all(), pg_getaddrinfo_all(), pg_set_noblock(), PGC_INTERNAL, PGC_S_OVERRIDE, PGINVALID_SOCKET, PGSTAT_MAX_MSG_SIZE, PGSTAT_MIN_RCVBUF, pgStatAddr, pgStatSock, recv, select, send, SetConfigOption(), socket, StaticAssertStmt, and TESTBYTEVAL.

Referenced by PostmasterMain().

357 {
358  ACCEPT_TYPE_ARG3 alen;
359  struct addrinfo *addrs = NULL,
360  *addr,
361  hints;
362  int ret;
363  fd_set rset;
364  struct timeval tv;
365  char test_byte;
366  int sel_res;
367  int tries = 0;
368 
369 #define TESTBYTEVAL ((char) 199)
370 
371  /*
372  * This static assertion verifies that we didn't mess up the calculations
373  * involved in selecting maximum payload sizes for our UDP messages.
374  * Because the only consequence of overrunning PGSTAT_MAX_MSG_SIZE would
375  * be silent performance loss from fragmentation, it seems worth having a
376  * compile-time cross-check that we didn't.
377  */
379  "maximum stats message size exceeds PGSTAT_MAX_MSG_SIZE");
380 
381  /*
382  * Create the UDP socket for sending and receiving statistic messages
383  */
384  hints.ai_flags = AI_PASSIVE;
385  hints.ai_family = AF_UNSPEC;
386  hints.ai_socktype = SOCK_DGRAM;
387  hints.ai_protocol = 0;
388  hints.ai_addrlen = 0;
389  hints.ai_addr = NULL;
390  hints.ai_canonname = NULL;
391  hints.ai_next = NULL;
392  ret = pg_getaddrinfo_all("localhost", NULL, &hints, &addrs);
393  if (ret || !addrs)
394  {
395  ereport(LOG,
396  (errmsg("could not resolve \"localhost\": %s",
397  gai_strerror(ret))));
398  goto startup_failed;
399  }
400 
401  /*
402  * On some platforms, pg_getaddrinfo_all() may return multiple addresses
403  * only one of which will actually work (eg, both IPv6 and IPv4 addresses
404  * when kernel will reject IPv6). Worse, the failure may occur at the
405  * bind() or perhaps even connect() stage. So we must loop through the
406  * results till we find a working combination. We will generate LOG
407  * messages, but no error, for bogus combinations.
408  */
409  for (addr = addrs; addr; addr = addr->ai_next)
410  {
411 #ifdef HAVE_UNIX_SOCKETS
412  /* Ignore AF_UNIX sockets, if any are returned. */
413  if (addr->ai_family == AF_UNIX)
414  continue;
415 #endif
416 
417  if (++tries > 1)
418  ereport(LOG,
419  (errmsg("trying another address for the statistics collector")));
420 
421  /*
422  * Create the socket.
423  */
424  if ((pgStatSock = socket(addr->ai_family, SOCK_DGRAM, 0)) == PGINVALID_SOCKET)
425  {
426  ereport(LOG,
428  errmsg("could not create socket for statistics collector: %m")));
429  continue;
430  }
431 
432  /*
433  * Bind it to a kernel assigned port on localhost and get the assigned
434  * port via getsockname().
435  */
436  if (bind(pgStatSock, addr->ai_addr, addr->ai_addrlen) < 0)
437  {
438  ereport(LOG,
440  errmsg("could not bind socket for statistics collector: %m")));
443  continue;
444  }
445 
446  alen = sizeof(pgStatAddr);
447  if (getsockname(pgStatSock, (struct sockaddr *) &pgStatAddr, &alen) < 0)
448  {
449  ereport(LOG,
451  errmsg("could not get address of socket for statistics collector: %m")));
454  continue;
455  }
456 
457  /*
458  * Connect the socket to its own address. This saves a few cycles by
459  * not having to respecify the target address on every send. This also
460  * provides a kernel-level check that only packets from this same
461  * address will be received.
462  */
463  if (connect(pgStatSock, (struct sockaddr *) &pgStatAddr, alen) < 0)
464  {
465  ereport(LOG,
467  errmsg("could not connect socket for statistics collector: %m")));
470  continue;
471  }
472 
473  /*
474  * Try to send and receive a one-byte test message on the socket. This
475  * is to catch situations where the socket can be created but will not
476  * actually pass data (for instance, because kernel packet filtering
477  * rules prevent it).
478  */
479  test_byte = TESTBYTEVAL;
480 
481 retry1:
482  if (send(pgStatSock, &test_byte, 1, 0) != 1)
483  {
484  if (errno == EINTR)
485  goto retry1; /* if interrupted, just retry */
486  ereport(LOG,
488  errmsg("could not send test message on socket for statistics collector: %m")));
491  continue;
492  }
493 
494  /*
495  * There could possibly be a little delay before the message can be
496  * received. We arbitrarily allow up to half a second before deciding
497  * it's broken.
498  */
499  for (;;) /* need a loop to handle EINTR */
500  {
501  FD_ZERO(&rset);
502  FD_SET(pgStatSock, &rset);
503 
504  tv.tv_sec = 0;
505  tv.tv_usec = 500000;
506  sel_res = select(pgStatSock + 1, &rset, NULL, NULL, &tv);
507  if (sel_res >= 0 || errno != EINTR)
508  break;
509  }
510  if (sel_res < 0)
511  {
512  ereport(LOG,
514  errmsg("select() failed in statistics collector: %m")));
517  continue;
518  }
519  if (sel_res == 0 || !FD_ISSET(pgStatSock, &rset))
520  {
521  /*
522  * This is the case we actually think is likely, so take pains to
523  * give a specific message for it.
524  *
525  * errno will not be set meaningfully here, so don't use it.
526  */
527  ereport(LOG,
528  (errcode(ERRCODE_CONNECTION_FAILURE),
529  errmsg("test message did not get through on socket for statistics collector")));
532  continue;
533  }
534 
535  test_byte++; /* just make sure variable is changed */
536 
537 retry2:
538  if (recv(pgStatSock, &test_byte, 1, 0) != 1)
539  {
540  if (errno == EINTR)
541  goto retry2; /* if interrupted, just retry */
542  ereport(LOG,
544  errmsg("could not receive test message on socket for statistics collector: %m")));
547  continue;
548  }
549 
550  if (test_byte != TESTBYTEVAL) /* strictly paranoia ... */
551  {
552  ereport(LOG,
553  (errcode(ERRCODE_INTERNAL_ERROR),
554  errmsg("incorrect test message transmission on socket for statistics collector")));
557  continue;
558  }
559 
560  /* If we get here, we have a working socket */
561  break;
562  }
563 
564  /* Did we find a working address? */
565  if (!addr || pgStatSock == PGINVALID_SOCKET)
566  goto startup_failed;
567 
568  /*
569  * Set the socket to non-blocking IO. This ensures that if the collector
570  * falls behind, statistics messages will be discarded; backends won't
571  * block waiting to send messages to the collector.
572  */
574  {
575  ereport(LOG,
577  errmsg("could not set statistics collector socket to nonblocking mode: %m")));
578  goto startup_failed;
579  }
580 
581  /*
582  * Try to ensure that the socket's receive buffer is at least
583  * PGSTAT_MIN_RCVBUF bytes, so that it won't easily overflow and lose
584  * data. Use of UDP protocol means that we are willing to lose data under
585  * heavy load, but we don't want it to happen just because of ridiculously
586  * small default buffer sizes (such as 8KB on older Windows versions).
587  */
588  {
589  int old_rcvbuf;
590  int new_rcvbuf;
591  ACCEPT_TYPE_ARG3 rcvbufsize = sizeof(old_rcvbuf);
592 
593  if (getsockopt(pgStatSock, SOL_SOCKET, SO_RCVBUF,
594  (char *) &old_rcvbuf, &rcvbufsize) < 0)
595  {
596  elog(LOG, "getsockopt(SO_RCVBUF) failed: %m");
597  /* if we can't get existing size, always try to set it */
598  old_rcvbuf = 0;
599  }
600 
601  new_rcvbuf = PGSTAT_MIN_RCVBUF;
602  if (old_rcvbuf < new_rcvbuf)
603  {
604  if (setsockopt(pgStatSock, SOL_SOCKET, SO_RCVBUF,
605  (char *) &new_rcvbuf, sizeof(new_rcvbuf)) < 0)
606  elog(LOG, "setsockopt(SO_RCVBUF) failed: %m");
607  }
608  }
609 
610  pg_freeaddrinfo_all(hints.ai_family, addrs);
611 
612  return;
613 
614 startup_failed:
615  ereport(LOG,
616  (errmsg("disabling statistics collector for lack of working socket")));
617 
618  if (addrs)
619  pg_freeaddrinfo_all(hints.ai_family, addrs);
620 
624 
625  /*
626  * Adjust GUC variables to suppress useless activity, and for debugging
627  * purposes (seeing track_counts off is a clue that we failed here). We
628  * use PGC_S_OVERRIDE because there is no point in trying to turn it back
629  * on from postgresql.conf without a restart.
630  */
631  SetConfigOption("track_counts", "off", PGC_INTERNAL, PGC_S_OVERRIDE);
632 }
void pg_freeaddrinfo_all(int hint_ai_family, struct addrinfo *ai)
Definition: ip.c:88
NON_EXEC_STATIC pgsocket pgStatSock
Definition: pgstat.c:149
#define closesocket
Definition: port.h:312
int errcode(int sqlerrcode)
Definition: elog.c:570
#define connect(s, name, namelen)
Definition: win32_port.h:444
#define LOG
Definition: elog.h:26
#define bind(s, addr, addrlen)
Definition: win32_port.h:441
#define recv(s, buf, len, flags)
Definition: win32_port.h:446
#define gai_strerror
Definition: getaddrinfo.h:146
int pg_getaddrinfo_all(const char *hostname, const char *servname, const struct addrinfo *hintp, struct addrinfo **result)
Definition: ip.c:57
#define StaticAssertStmt(condition, errmessage)
Definition: c.h:842
#define PGSTAT_MIN_RCVBUF
Definition: pgstat.c:97
#define TESTBYTEVAL
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:7487
#define AI_PASSIVE
Definition: getaddrinfo.h:62
#define select(n, r, w, e, timeout)
Definition: win32_port.h:445
#define ereport(elevel, rest)
Definition: elog.h:141
int errcode_for_socket_access(void)
Definition: elog.c:664
#define socket(af, type, protocol)
Definition: win32_port.h:440
#define PGSTAT_MAX_MSG_SIZE
Definition: pgstat.h:206
#define PGINVALID_SOCKET
Definition: port.h:33
static struct sockaddr_storage pgStatAddr
Definition: pgstat.c:151
bool pg_set_noblock(pgsocket sock)
Definition: noblock.c:25
struct addrinfo * ai_next
Definition: getaddrinfo.h:107
int errmsg(const char *fmt,...)
Definition: elog.c:784
#define elog(elevel,...)
Definition: elog.h:226
#define EINTR
Definition: win32_port.h:332
#define send(s, buf, len, flags)
Definition: win32_port.h:447

◆ pgstat_init_function_usage()

void pgstat_init_function_usage ( FunctionCallInfo  fcinfo,
PgStat_FunctionCallUsage fcu 
)

Definition at line 1622 of file pgstat.c.

References HASHCTL::entrysize, PgStat_BackendFunctionEntry::f_counts, PgStat_FunctionCallUsage::f_start, PgStat_FunctionCounts::f_total_time, FunctionCallInfoBaseData::flinfo, FmgrInfo::fn_oid, PgStat_FunctionCallUsage::fs, HASH_BLOBS, hash_create(), HASH_ELEM, HASH_ENTER, hash_search(), INSTR_TIME_SET_CURRENT, HASHCTL::keysize, MemSet, PGSTAT_FUNCTION_HASH_SIZE, PgStat_FunctionCallUsage::save_f_total_time, PgStat_FunctionCallUsage::save_total, and total_func_time.

Referenced by call_pltcl_start_proc(), EventTriggerInvoke(), ExecCallTriggerFunc(), ExecEvalFuncExprFusage(), ExecEvalFuncExprStrictFusage(), ExecMakeFunctionResultSet(), ExecMakeTableFunctionResult(), ExecuteCallStmt(), and fmgr_security_definer().

1624 {
1625  PgStat_BackendFunctionEntry *htabent;
1626  bool found;
1627 
1628  if (pgstat_track_functions <= fcinfo->flinfo->fn_stats)
1629  {
1630  /* stats not wanted */
1631  fcu->fs = NULL;
1632  return;
1633  }
1634 
1635  if (!pgStatFunctions)
1636  {
1637  /* First time through - initialize function stat table */
1638  HASHCTL hash_ctl;
1639 
1640  memset(&hash_ctl, 0, sizeof(hash_ctl));
1641  hash_ctl.keysize = sizeof(Oid);
1642  hash_ctl.entrysize = sizeof(PgStat_BackendFunctionEntry);
1643  pgStatFunctions = hash_create("Function stat entries",
1645  &hash_ctl,
1646  HASH_ELEM | HASH_BLOBS);
1647  }
1648 
1649  /* Get the stats entry for this function, create if necessary */
1650  htabent = hash_search(pgStatFunctions, &fcinfo->flinfo->fn_oid,
1651  HASH_ENTER, &found);
1652  if (!found)
1653  MemSet(&htabent->f_counts, 0, sizeof(PgStat_FunctionCounts));
1654 
1655  fcu->fs = &htabent->f_counts;
1656 
1657  /* save stats for this function, later used to compensate for recursion */
1658  fcu->save_f_total_time = htabent->f_counts.f_total_time;
1659 
1660  /* save current backend-wide total time */
1661  fcu->save_total = total_func_time;
1662 
1663  /* get clock time as of function start */
1665 }
#define HASH_ELEM
Definition: hsearch.h:87
instr_time save_total
Definition: pgstat.h:1201
Size entrysize
Definition: hsearch.h:73
#define MemSet(start, val, len)
Definition: c.h:955
instr_time f_total_time
Definition: pgstat.h:462
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
unsigned int Oid
Definition: postgres_ext.h:31
PgStat_FunctionCounts * fs
Definition: pgstat.h:1197
PgStat_FunctionCounts f_counts
Definition: pgstat.h:473
#define PGSTAT_FUNCTION_HASH_SIZE
Definition: pgstat.c:106
#define HASH_BLOBS
Definition: hsearch.h:88
HTAB * hash_create(const char *tabname, long nelem, HASHCTL *info, int flags)
Definition: dynahash.c:316
FmgrInfo * flinfo
Definition: fmgr.h:87
Size keysize
Definition: hsearch.h:72
Oid fn_oid
Definition: fmgr.h:59
static instr_time total_func_time
Definition: pgstat.c:276
static HTAB * pgStatFunctions
Definition: pgstat.c:197
#define INSTR_TIME_SET_CURRENT(t)
Definition: instr_time.h:156
instr_time save_f_total_time
Definition: pgstat.h:1199
struct PgStat_BackendFunctionEntry PgStat_BackendFunctionEntry

◆ pgstat_initialize()

void pgstat_initialize ( void  )

Definition at line 2815 of file pgstat.c.

References Assert, InvalidBackendId, MaxBackends, MyAuxProcType, MyBackendId, NotAnAuxProcess, on_shmem_exit(), and pgstat_beshutdown_hook().

Referenced by AuxiliaryProcessMain(), and InitPostgres().

2816 {
2817  /* Initialize MyBEEntry */
2819  {
2822  }
2823  else
2824  {
2825  /* Must be an auxiliary process */
2827 
2828  /*
2829  * Assign the MyBEEntry for an auxiliary process. Since it doesn't
2830  * have a BackendId, the slot is statically allocated based on the
2831  * auxiliary process type (MyAuxProcType). Backends use slots indexed
2832  * in the range from 1 to MaxBackends (inclusive), so we use
2833  * MaxBackends + AuxBackendType + 1 as the index of the slot for an
2834  * auxiliary process.
2835  */
2837  }
2838 
2839  /* Set up a process-exit hook to clean up */
2841 }
static PgBackendStatus * BackendStatusArray
Definition: pgstat.c:2634
BackendId MyBackendId
Definition: globals.c:81
int MaxBackends
Definition: globals.c:135
static PgBackendStatus * MyBEEntry
Definition: pgstat.c:2635
void on_shmem_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:361
static void pgstat_beshutdown_hook(int code, Datum arg)
Definition: pgstat.c:3083
#define InvalidBackendId
Definition: backendid.h:23
AuxProcType MyAuxProcType
Definition: bootstrap.c:72
#define Assert(condition)
Definition: c.h:732

◆ pgstat_initstats()

void pgstat_initstats ( Relation  rel)

Definition at line 1751 of file pgstat.c.

References get_tabstat_entry(), PGINVALID_SOCKET, RelationData::pgstat_info, pgstat_track_counts, pgStatSock, RelationData::rd_id, RelationData::rd_rel, relkind, and PgStat_TableStatus::t_id.

Referenced by relation_open(), and try_relation_open().

1752 {
1753  Oid rel_id = rel->rd_id;
1754  char relkind = rel->rd_rel->relkind;
1755 
1756  /* We only count stats for things that have storage */
1757  if (!(relkind == RELKIND_RELATION ||
1758  relkind == RELKIND_MATVIEW ||
1759  relkind == RELKIND_INDEX ||
1760  relkind == RELKIND_TOASTVALUE ||
1761  relkind == RELKIND_SEQUENCE))
1762  {
1763  rel->pgstat_info = NULL;
1764  return;
1765  }
1766 
1768  {
1769  /* We're not counting at all */
1770  rel->pgstat_info = NULL;
1771  return;
1772  }
1773 
1774  /*
1775  * If we already set up this relation in the current transaction, nothing
1776  * to do.
1777  */
1778  if (rel->pgstat_info != NULL &&
1779  rel->pgstat_info->t_id == rel_id)
1780  return;
1781 
1782  /* Else find or make the PgStat_TableStatus entry, and update link */
1783  rel->pgstat_info = get_tabstat_entry(rel_id, rel->rd_rel->relisshared);
1784 }
NON_EXEC_STATIC pgsocket pgStatSock
Definition: pgstat.c:149
Form_pg_class rd_rel
Definition: rel.h:83
unsigned int Oid
Definition: postgres_ext.h:31
char relkind
Definition: pg_class.h:81
bool pgstat_track_counts
Definition: pgstat.c:126
Oid rd_id
Definition: rel.h:85
static PgStat_TableStatus * get_tabstat_entry(Oid rel_id, bool isshared)
Definition: pgstat.c:1790
#define PGINVALID_SOCKET
Definition: port.h:33
struct PgStat_TableStatus * pgstat_info
Definition: rel.h:204

◆ pgstat_ping()

void pgstat_ping ( void  )

Definition at line 1587 of file pgstat.c.

References PgStat_MsgDummy::m_hdr, PGINVALID_SOCKET, PGSTAT_MTYPE_DUMMY, pgstat_send(), pgstat_setheader(), and pgStatSock.

1588 {
1589  PgStat_MsgDummy msg;
1590 
1592  return;
1593 
1595  pgstat_send(&msg, sizeof(msg));
1596 }
static void pgstat_send(void *msg, int len)
Definition: pgstat.c:4341
NON_EXEC_STATIC pgsocket pgStatSock
Definition: pgstat.c:149
#define PGINVALID_SOCKET
Definition: port.h:33
PgStat_MsgHdr m_hdr
Definition: pgstat.h:216
static void pgstat_setheader(PgStat_MsgHdr *hdr, StatMsgType mtype)
Definition: pgstat.c:4328

◆ pgstat_progress_end_command()

void pgstat_progress_end_command ( void  )

Definition at line 3271 of file pgstat.c.

References InvalidOid, MyBEEntry, PGSTAT_BEGIN_WRITE_ACTIVITY, PGSTAT_END_WRITE_ACTIVITY, pgstat_track_activities, PROGRESS_COMMAND_INVALID, PgBackendStatus::st_progress_command, and PgBackendStatus::st_progress_command_target.

Referenced by AbortSubTransaction(), AbortTransaction(), cluster_rel(), DefineIndex(), heap_vacuum_rel(), reindex_index(), and ReindexRelationConcurrently().

3272 {
3273  volatile PgBackendStatus *beentry = MyBEEntry;
3274 
3275  if (!beentry)
3276  return;
3279  return;
3280 
3281  PGSTAT_BEGIN_WRITE_ACTIVITY(beentry);
3284  PGSTAT_END_WRITE_ACTIVITY(beentry);
3285 }
Oid st_progress_command_target
Definition: pgstat.h:1097
ProgressCommandType st_progress_command
Definition: pgstat.h:1096
static PgBackendStatus * MyBEEntry
Definition: pgstat.c:2635
#define PGSTAT_END_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1137
#define InvalidOid
Definition: postgres_ext.h:36
bool pgstat_track_activities
Definition: pgstat.c:125
#define PGSTAT_BEGIN_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1130

◆ pgstat_progress_start_command()

void pgstat_progress_start_command ( ProgressCommandType  cmdtype,
Oid  relid 
)

Definition at line 3199 of file pgstat.c.

References MemSet, MyBEEntry, PGSTAT_BEGIN_WRITE_ACTIVITY, PGSTAT_END_WRITE_ACTIVITY, pgstat_track_activities, PgBackendStatus::st_progress_command, PgBackendStatus::st_progress_command_target, and PgBackendStatus::st_progress_param.

Referenced by cluster_rel(), DefineIndex(), heap_vacuum_rel(), reindex_index(), and ReindexRelationConcurrently().

3200 {
3201  volatile PgBackendStatus *beentry = MyBEEntry;
3202 
3203  if (!beentry || !pgstat_track_activities)
3204  return;
3205 
3206  PGSTAT_BEGIN_WRITE_ACTIVITY(beentry);
3207  beentry->st_progress_command = cmdtype;
3208  beentry->st_progress_command_target = relid;
3209  MemSet(&beentry->st_progress_param, 0, sizeof(beentry->st_progress_param));
3210  PGSTAT_END_WRITE_ACTIVITY(beentry);
3211 }
Oid st_progress_command_target
Definition: pgstat.h:1097
#define MemSet(start, val, len)
Definition: c.h:955
ProgressCommandType st_progress_command
Definition: pgstat.h:1096
static PgBackendStatus * MyBEEntry
Definition: pgstat.c:2635
#define PGSTAT_END_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1137
int64 st_progress_param[PGSTAT_NUM_PROGRESS_PARAM]
Definition: pgstat.h:1098
bool pgstat_track_activities
Definition: pgstat.c:125
#define PGSTAT_BEGIN_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1130

◆ pgstat_progress_update_multi_param()

void pgstat_progress_update_multi_param ( int  nparam,
const int *  index,
const int64 *  val 
)

Definition at line 3242 of file pgstat.c.

References Assert, i, MyBEEntry, PGSTAT_BEGIN_WRITE_ACTIVITY, PGSTAT_END_WRITE_ACTIVITY, PGSTAT_NUM_PROGRESS_PARAM, pgstat_track_activities, and PgBackendStatus::st_progress_param.

Referenced by _bt_spools_heapscan(), heapam_relation_copy_for_cluster(), index_build(), lazy_scan_heap(), validate_index(), and WaitForLockersMultiple().

3244 {
3245  volatile PgBackendStatus *beentry = MyBEEntry;
3246  int i;
3247 
3248  if (!beentry || !pgstat_track_activities || nparam == 0)
3249  return;
3250 
3251  PGSTAT_BEGIN_WRITE_ACTIVITY(beentry);
3252 
3253  for (i = 0; i < nparam; ++i)
3254  {
3255  Assert(index[i] >= 0 && index[i] < PGSTAT_NUM_PROGRESS_PARAM);
3256 
3257  beentry->st_progress_param[index[i]] = val[i];
3258  }
3259 
3260  PGSTAT_END_WRITE_ACTIVITY(beentry);
3261 }
Definition: type.h:89
#define PGSTAT_NUM_PROGRESS_PARAM
Definition: pgstat.h:962
static PgBackendStatus * MyBEEntry
Definition: pgstat.c:2635
#define PGSTAT_END_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1137
#define Assert(condition)
Definition: c.h:732
int64 st_progress_param[PGSTAT_NUM_PROGRESS_PARAM]
Definition: pgstat.h:1098
bool pgstat_track_activities
Definition: pgstat.c:125
int i
#define PGSTAT_BEGIN_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1130
long val
Definition: informix.c:684

◆ pgstat_progress_update_param()

void pgstat_progress_update_param ( int  index,
int64  val 
)

Definition at line 3220 of file pgstat.c.

References Assert, MyBEEntry, PGSTAT_BEGIN_WRITE_ACTIVITY, PGSTAT_END_WRITE_ACTIVITY, PGSTAT_NUM_PROGRESS_PARAM, pgstat_track_activities, PgBackendStatus::st_progress_param, and val.

Referenced by _bt_leafbuild(), _bt_load(), _bt_spools_heapscan(), _h_indexbuild(), btvacuumscan(), cluster_rel(), DefineIndex(), finish_heap_swap(), hashbuild(), heap_vacuum_rel(), heapam_index_build_range_scan(), heapam_index_validate_scan(), heapam_relation_copy_for_cluster(), lazy_record_dead_tuple(), lazy_scan_heap(), lazy_truncate_heap(), lazy_vacuum_page(), reindex_index(), reindex_relation(), ReindexRelationConcurrently(), validate_index(), WaitForLockersMultiple(), and WaitForOlderSnapshots().

3221 {
3222  volatile PgBackendStatus *beentry = MyBEEntry;
3223 
3225 
3226  if (!beentry || !pgstat_track_activities)
3227  return;
3228 
3229  PGSTAT_BEGIN_WRITE_ACTIVITY(beentry);
3230  beentry->st_progress_param[index] = val;
3231  PGSTAT_END_WRITE_ACTIVITY(beentry);
3232 }
Definition: type.h:89
#define PGSTAT_NUM_PROGRESS_PARAM
Definition: pgstat.h:962
static PgBackendStatus * MyBEEntry
Definition: pgstat.c:2635
#define PGSTAT_END_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1137
#define Assert(condition)
Definition: c.h:732
int64 st_progress_param[PGSTAT_NUM_PROGRESS_PARAM]
Definition: pgstat.h:1098
bool pgstat_track_activities
Definition: pgstat.c:125
#define PGSTAT_BEGIN_WRITE_ACTIVITY(beentry)
Definition: pgstat.h:1130
long val
Definition: informix.c:684

◆ pgstat_read_current_status()

static void pgstat_read_current_status ( void  )
static

Definition at line 3350 of file pgstat.c.

References Assert, LocalPgBackendStatus::backend_xid, LocalPgBackendStatus::backend_xmin, BackendIdGetTransactionIds(), LocalPgBackendStatus::backendStatus, BackendStatusArray, CHECK_FOR_INTERRUPTS, i, localNumBackends, MemoryContextAlloc(), MemoryContextAllocHuge(), NAMEDATALEN, NumBackendStatSlots, pgstat_begin_read_activity, pgstat_end_read_activity, pgstat_read_activity_complete, pgstat_setup_memcxt(), pgstat_track_activity_query_size, pgStatRunningInCollector, PgBackendStatus::st_activity_raw, PgBackendStatus::st_appname, PgBackendStatus::st_clienthostname, PgBackendStatus::st_gss, PgBackendStatus::st_gssstatus, PgBackendStatus::st_procpid, PgBackendStatus::st_ssl, PgBackendStatus::st_sslstatus, and unvolatize.

Referenced by pgstat_fetch_stat_beentry(), pgstat_fetch_stat_local_beentry(), and pgstat_fetch_stat_numbackends().

3351 {
3352  volatile PgBackendStatus *beentry;
3353  LocalPgBackendStatus *localtable;
3354  LocalPgBackendStatus *localentry;
3355  char *localappname,
3356  *localclienthostname,
3357  *localactivity;
3358 #ifdef USE_SSL
3359  PgBackendSSLStatus *localsslstatus;
3360 #endif
3361 #ifdef ENABLE_GSS
3362  PgBackendGSSStatus *localgssstatus;
3363 #endif
3364  int i;
3365 
3368  return; /* already done */
3369 
3371 
3372  /*
3373  * Allocate storage for local copy of state data. We can presume that
3374  * none of these requests overflow size_t, because we already calculated
3375  * the same values using mul_size during shmem setup. However, with
3376  * probably-silly values of pgstat_track_activity_query_size and
3377  * max_connections, the localactivity buffer could exceed 1GB, so use
3378  * "huge" allocation for that one.
3379  */
3380  localtable = (LocalPgBackendStatus *)
3383  localappname = (char *)
3386  localclienthostname = (char *)
3388  NAMEDATALEN * NumBackendStatSlots);
3389  localactivity = (char *)
3391  pgstat_track_activity_query_size * NumBackendStatSlots);
3392 #ifdef USE_SSL
3393  localsslstatus = (PgBackendSSLStatus *)
3396 #endif
3397 #ifdef ENABLE_GSS
3398  localgssstatus = (PgBackendGSSStatus *)
3401 #endif
3402 
3403  localNumBackends = 0;
3404 
3405  beentry = BackendStatusArray;
3406  localentry = localtable;
3407  for (i = 1; i <= NumBackendStatSlots; i++)
3408  {
3409  /*
3410  * Follow the protocol of retrying if st_changecount changes while we
3411  * copy the entry, or if it's odd. (The check for odd is needed to
3412  * cover the case where we are able to completely copy the entry while
3413  * the source backend is between increment steps.) We use a volatile
3414  * pointer here to ensure the compiler doesn't try to get cute.
3415  */
3416  for (;;)
3417  {
3418  int before_changecount;
3419  int after_changecount;
3420 
3421  pgstat_begin_read_activity(beentry, before_changecount);
3422 
3423  localentry->backendStatus.st_procpid = beentry->st_procpid;
3424  /* Skip all the data-copying work if entry is not in use */
3425  if (localentry->backendStatus.st_procpid > 0)
3426  {
3427  memcpy(&localentry->backendStatus, unvolatize(PgBackendStatus *, beentry), sizeof(PgBackendStatus));
3428 
3429  /*
3430  * For each PgBackendStatus field that is a pointer, copy the
3431  * pointed-to data, then adjust the local copy of the pointer
3432  * field to point at the local copy of the data.
3433  *
3434  * strcpy is safe even if the string is modified concurrently,
3435  * because there's always a \0 at the end of the buffer.
3436  */
3437  strcpy(localappname, (char *) beentry->st_appname);
3438  localentry->backendStatus.st_appname = localappname;
3439  strcpy(localclienthostname, (char *) beentry->st_clienthostname);
3440  localentry->backendStatus.st_clienthostname = localclienthostname;
3441  strcpy(localactivity, (char *) beentry->st_activity_raw);
3442  localentry->backendStatus.st_activity_raw = localactivity;
3443 #ifdef USE_SSL
3444  if (beentry->st_ssl)
3445  {
3446  memcpy(localsslstatus, beentry->st_sslstatus, sizeof(PgBackendSSLStatus));
3447  localentry->backendStatus.st_sslstatus = localsslstatus;
3448  }
3449 #endif
3450 #ifdef ENABLE_GSS
3451  if (beentry->st_gss)
3452  {
3453  memcpy(localgssstatus, beentry->st_gssstatus, sizeof(PgBackendGSSStatus));
3454  localentry->backendStatus.st_gssstatus = localgssstatus;
3455  }
3456 #endif
3457  }
3458 
3459  pgstat_end_read_activity(beentry, after_changecount);
3460 
3461  if (pgstat_read_activity_complete(before_changecount,
3462  after_changecount))
3463  break;
3464 
3465  /* Make sure we can break out of loop if stuck... */
3467  }
3468 
3469  beentry++;
3470  /* Only valid entries get included into the local array */
3471  if (localentry->backendStatus.st_procpid > 0)
3472  {
3474  &localentry->backend_xid,
3475  &localentry->backend_xmin);
3476 
3477  localentry++;
3478  localappname += NAMEDATALEN;
3479  localclienthostname += NAMEDATALEN;
3480  localactivity += pgstat_track_activity_query_size;
3481 #ifdef USE_SSL
3482  localsslstatus++;
3483 #endif
3484 #ifdef ENABLE_GSS
3485  localgssstatus++;
3486 #endif
3487  localNumBackends++;
3488  }
3489  }
3490 
3491  /* Set the pointer only after completion of a valid table */
3492  localBackendStatusTable = localtable;
3493 }
static PgBackendStatus * BackendStatusArray
Definition: pgstat.c:2634
static bool pgStatRunningInCollector
Definition: pgstat.c:155
TransactionId backend_xmin
Definition: pgstat.h:1187
#define NumBackendStatSlots
Definition: pgstat.c:118
char * st_clienthostname
Definition: pgstat.h:1062
#define NAMEDATALEN
TransactionId backend_xid
Definition: pgstat.h:1181
void * MemoryContextAllocHuge(MemoryContext context, Size size)
Definition: mcxt.c:1080
char * st_activity_raw
Definition: pgstat.h:1085
int pgstat_track_activity_query_size
Definition: pgstat.c:128
char * st_appname
Definition: pgstat.h:1076
#define pgstat_end_read_activity(beentry, after_changecount)
Definition: pgstat.h:1151
static void pgstat_setup_memcxt(void)
Definition: pgstat.c:5776
PgBackendStatus backendStatus
Definition: pgstat.h:1175
void BackendIdGetTransactionIds(int backendID, TransactionId *xid, TransactionId *xmin)
Definition: sinvaladt.c:404
#define Assert(condition)
Definition: c.h:732
static LocalPgBackendStatus * localBackendStatusTable
Definition: pgstat.c:247
#define pgstat_begin_read_activity(beentry, before_changecount)
Definition: pgstat.h:1145
static int localNumBackends
Definition: pgstat.c:250
#define unvolatize(underlying_type, expr)
Definition: c.h:1165
void * MemoryContextAlloc(MemoryContext context, Size size)
Definition: mcxt.c:771
int i
static MemoryContext pgStatLocalContext
Definition: pgstat.c:243
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:99
PgBackendSSLStatus * st_sslstatus
Definition: pgstat.h:1066
PgBackendGSSStatus * st_gssstatus
Definition: pgstat.h:1070
#define pgstat_read_activity_complete(before_changecount, after_changecount)
Definition: pgstat.h:1157

◆ pgstat_read_db_statsfile()

static void pgstat_read_db_statsfile ( Oid  databaseid,
HTAB tabhash,
HTAB funchash,
bool  permanent 
)
static

Definition at line 5361 of file pgstat.c.

References AllocateFile(), DEBUG2, elog, ereport, errcode_for_file_access(), errmsg(), FreeFile(), PgStat_StatFuncEntry::functionid, get_dbstat_filename(), HASH_ENTER, hash_search(), LOG, MAXPGPATH, PG_BINARY_R, PGSTAT_FILE_FORMAT_ID, pgStatRunningInCollector, PgStat_StatTabEntry::tableid, and WARNING.

Referenced by pgstat_read_statsfiles().

5363 {
5364  PgStat_StatTabEntry *tabentry;
5365  PgStat_StatTabEntry tabbuf;
5366  PgStat_StatFuncEntry funcbuf;
5367  PgStat_StatFuncEntry *funcentry;
5368  FILE *fpin;
5369  int32 format_id;
5370  bool found;
5371  char statfile[MAXPGPATH];
5372 
5373  get_dbstat_filename(permanent, false, databaseid, statfile, MAXPGPATH);
5374 
5375  /*
5376  * Try to open the stats file. If it doesn't exist, the backends simply
5377  * return zero for anything and the collector simply starts from scratch
5378  * with empty counters.
5379  *
5380  * ENOENT is a possibility if the stats collector is not running or has
5381  * not yet written the stats file the first time. Any other failure
5382  * condition is suspicious.
5383  */
5384  if ((fpin = AllocateFile(statfile, PG_BINARY_R)) == NULL)
5385  {
5386  if (errno != ENOENT)
5389  errmsg("could not open statistics file \"%s\": %m",
5390  statfile)));
5391  return;
5392  }
5393 
5394  /*
5395  * Verify it's of the expected format.
5396  */
5397  if (fread(&format_id, 1, sizeof(format_id), fpin) != sizeof(format_id) ||
5398  format_id != PGSTAT_FILE_FORMAT_ID)
5399  {
5400  ereport(pgStatRunningInCollector ? LOG : WARNING,
5401  (errmsg("corrupted statistics file \"%s\"", statfile)));
5402  goto done;
5403  }
5404 
5405  /*
5406  * We found an existing collector stats file. Read it and put all the
5407  * hashtable entries into place.
5408  */
5409  for (;;)
5410  {
5411  switch (fgetc(fpin))
5412  {
5413  /*
5414  * 'T' A PgStat_StatTabEntry follows.
5415  */
5416  case 'T':
5417  if (fread(&tabbuf, 1, sizeof(PgStat_StatTabEntry),
5418  fpin) != sizeof(PgStat_StatTabEntry))
5419  {
5420  ereport(pgStatRunningInCollector ? LOG : WARNING,
5421  (errmsg("corrupted statistics file \"%s\"",
5422  statfile)));
5423  goto done;
5424  }
5425 
5426  /*
5427  * Skip if table data not wanted.
5428  */
5429  if (tabhash == NULL)
5430  break;
5431 
5432  tabentry = (PgStat_StatTabEntry *) hash_search(tabhash,
5433  (void *) &tabbuf.tableid,
5434  HASH_ENTER, &found);
5435 
5436  if (found)
5437  {
5438  ereport(pgStatRunningInCollector ? LOG : WARNING,
5439  (errmsg("corrupted statistics file \"%s\"",
5440  statfile)));
5441  goto done;
5442  }
5443 
5444  memcpy(tabentry, &tabbuf, sizeof(tabbuf));
5445  break;
5446 
5447  /*
5448  * 'F' A PgStat_StatFuncEntry follows.
5449  */
5450  case 'F':
5451  if (fread(&funcbuf, 1, sizeof(PgStat_StatFuncEntry),
5452  fpin) != sizeof(PgStat_StatFuncEntry))
5453  {
5454  ereport(pgStatRunningInCollector ? LOG : WARNING,
5455  (errmsg("corrupted statistics file \"%s\"",
5456  statfile)));
5457  goto done;
5458  }
5459 
5460  /*
5461  * Skip if function data not wanted.
5462  */
5463  if (funchash == NULL)
5464  break;
5465 
5466  funcentry = (PgStat_StatFuncEntry *) hash_search(funchash,
5467  (void *) &funcbuf.functionid,
5468  HASH_ENTER, &found);
5469 
5470  if (found)
5471  {
5472  ereport(pgStatRunningInCollector ? LOG : WARNING,
5473  (errmsg("corrupted statistics file \"%s\"",
5474  statfile)));
5475  goto done;
5476  }
5477 
5478  memcpy(funcentry, &funcbuf, sizeof(funcbuf));
5479  break;
5480 
5481  /*
5482  * 'E' The EOF marker of a complete stats file.
5483  */
5484  case 'E':
5485  goto done;
5486 
5487  default:
5488  ereport(pgStatRunningInCollector ? LOG : WARNING,
5489  (errmsg("corrupted statistics file \"%s\"",
5490  statfile)));
5491  goto done;
5492  }
5493  }
5494 
5495 done:
5496  FreeFile(fpin);
5497 
5498  if (permanent)
5499  {
5500  elog(DEBUG2, "removing permanent stats file \"%s\"", statfile);
5501  unlink(statfile);
5502  }
5503 }
static bool pgStatRunningInCollector
Definition: pgstat.c:155
void * hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action, bool *foundPtr)
Definition: dynahash.c:906
#define LOG
Definition: elog.h:26
#define PG_BINARY_R
Definition: c.h:1193
signed int int32
Definition: c.h:346
#define MAXPGPATH
#define DEBUG2
Definition: elog.h:24
int errcode_for_file_access(void)
Definition: elog.c:593
FILE * AllocateFile(const char *name, const char *mode)
Definition: fd.c:2207
#define ereport(elevel, rest)
Definition: elog.h:141
#define WARNING
Definition: elog.h:40
int FreeFile(FILE *file)
Definition: fd.c:2406
#define PGSTAT_FILE_FORMAT_ID
Definition: pgstat.h:584
int errmsg(const char *fmt,...)
Definition: elog.c:784
#define elog(elevel,...)
Definition: elog.h:226
static void get_dbstat_filename(bool permanent, bool tempname, Oid databaseid, char *filename, int len)
Definition: pgstat.c:4980

◆ pgstat_read_db_statsfile_timestamp()

static bool pgstat_read_db_statsfile_timestamp ( Oid  databaseid,
bool  permanent,
TimestampTz ts 
)
static

Definition at line 5523 of file pgstat.c.

References AllocateFile(), PgStat_StatDBEntry::databaseid, ereport, errcode_for_file_access(), errmsg(), FreeFile(), LOG, offsetof, PG_BINARY_R, PGSTAT_FILE_FORMAT_ID, pgstat_stat_filename, PGSTAT_STAT_PERMANENT_FILENAME, pgStatRunningInCollector, PgStat_StatDBEntry::stats_timestamp, PgStat_GlobalStats::stats_timestamp, and WARNING.

Referenced by backend_read_statsfile().

5525 {
5526  PgStat_StatDBEntry dbentry;
5527  PgStat_GlobalStats myGlobalStats;
5528  PgStat_ArchiverStats myArchiverStats;
5529  FILE *fpin;
5530  int32 format_id;
5531  const char *statfile = permanent ? PGSTAT_STAT_PERMANENT_FILENAME : pgstat_stat_filename;
5532 
5533  /*
5534  * Try to open the stats file. As above, anything but ENOENT is worthy of
5535  * complaining about.
5536  */
5537  if ((fpin = AllocateFile(statfile, PG_BINARY_R)) == NULL)
5538  {
5539  if (errno != ENOENT)
5542  errmsg("could not open statistics file \"%s\": %m",
5543