PostgreSQL Source Code  git master
pgstat_xact.c File Reference
#include "postgres.h"
#include "access/transam.h"
#include "access/xact.h"
#include "pgstat.h"
#include "utils/memutils.h"
#include "utils/pgstat_internal.h"
Include dependency graph for pgstat_xact.c:

Go to the source code of this file.

Data Structures

struct  PgStat_PendingDroppedStatsItem
 

Typedefs

typedef struct PgStat_PendingDroppedStatsItem PgStat_PendingDroppedStatsItem
 

Functions

static void AtEOXact_PgStat_DroppedStats (PgStat_SubXactStatus *xact_state, bool isCommit)
 
static void AtEOSubXact_PgStat_DroppedStats (PgStat_SubXactStatus *xact_state, bool isCommit, int nestDepth)
 
void AtEOXact_PgStat (bool isCommit, bool parallel)
 
void AtEOSubXact_PgStat (bool isCommit, int nestDepth)
 
void AtPrepare_PgStat (void)
 
void PostPrepare_PgStat (void)
 
PgStat_SubXactStatuspgstat_get_xact_stack_level (int nest_level)
 
int pgstat_get_transactional_drops (bool isCommit, xl_xact_stats_item **items)
 
void pgstat_execute_transactional_drops (int ndrops, struct xl_xact_stats_item *items, bool is_redo)
 
static void create_drop_transactional_internal (PgStat_Kind kind, Oid dboid, Oid objoid, bool is_create)
 
void pgstat_create_transactional (PgStat_Kind kind, Oid dboid, Oid objoid)
 
void pgstat_drop_transactional (PgStat_Kind kind, Oid dboid, Oid objoid)
 

Variables

static PgStat_SubXactStatuspgStatXactStack = NULL
 

Typedef Documentation

◆ PgStat_PendingDroppedStatsItem

Function Documentation

◆ AtEOSubXact_PgStat()

void AtEOSubXact_PgStat ( bool  isCommit,
int  nestDepth 
)

Definition at line 113 of file pgstat_xact.c.

114 {
115  PgStat_SubXactStatus *xact_state;
116 
117  /* merge the sub-transaction's transactional stats into the parent */
118  xact_state = pgStatXactStack;
119  if (xact_state != NULL &&
120  xact_state->nest_level >= nestDepth)
121  {
122  /* delink xact_state from stack immediately to simplify reuse case */
123  pgStatXactStack = xact_state->prev;
124 
125  AtEOSubXact_PgStat_Relations(xact_state, isCommit, nestDepth);
126  AtEOSubXact_PgStat_DroppedStats(xact_state, isCommit, nestDepth);
127 
128  pfree(xact_state);
129  }
130 }
void pfree(void *pointer)
Definition: mcxt.c:1306
void AtEOSubXact_PgStat_Relations(PgStat_SubXactStatus *xact_state, bool isCommit, int nestDepth)
static PgStat_SubXactStatus * pgStatXactStack
Definition: pgstat_xact.c:34
static void AtEOSubXact_PgStat_DroppedStats(PgStat_SubXactStatus *xact_state, bool isCommit, int nestDepth)
Definition: pgstat_xact.c:136
struct PgStat_SubXactStatus * prev

References AtEOSubXact_PgStat_DroppedStats(), AtEOSubXact_PgStat_Relations(), PgStat_SubXactStatus::nest_level, pfree(), pgStatXactStack, and PgStat_SubXactStatus::prev.

Referenced by AbortSubTransaction(), and CommitSubTransaction().

◆ AtEOSubXact_PgStat_DroppedStats()

static void AtEOSubXact_PgStat_DroppedStats ( PgStat_SubXactStatus xact_state,
bool  isCommit,
int  nestDepth 
)
static

Definition at line 136 of file pgstat_xact.c.

138 {
139  PgStat_SubXactStatus *parent_xact_state;
140  dlist_mutable_iter iter;
141  int not_freed_count = 0;
142 
143  if (dclist_count(&xact_state->pending_drops) == 0)
144  return;
145 
146  parent_xact_state = pgstat_get_xact_stack_level(nestDepth - 1);
147 
148  dclist_foreach_modify(iter, &xact_state->pending_drops)
149  {
152  xl_xact_stats_item *it = &pending->item;
153 
154  dclist_delete_from(&xact_state->pending_drops, &pending->node);
155 
156  if (!isCommit && pending->is_create)
157  {
158  /*
159  * Subtransaction creating a new stats object aborted. Drop the
160  * stats object.
161  */
162  if (!pgstat_drop_entry(it->kind, it->dboid, it->objoid))
163  not_freed_count++;
164  pfree(pending);
165  }
166  else if (isCommit)
167  {
168  /*
169  * Subtransaction dropping a stats object committed. Can't yet
170  * remove the stats object, the surrounding transaction might
171  * still abort. Pass it on to the parent.
172  */
173  dclist_push_tail(&parent_xact_state->pending_drops, &pending->node);
174  }
175  else
176  {
177  pfree(pending);
178  }
179  }
180 
181  Assert(dclist_count(&xact_state->pending_drops) == 0);
182  if (not_freed_count > 0)
184 }
#define dclist_container(type, membername, ptr)
Definition: ilist.h:884
static void dclist_push_tail(dclist_head *head, dlist_node *node)
Definition: ilist.h:659
static uint32 dclist_count(dclist_head *head)
Definition: ilist.h:869
static void dclist_delete_from(dclist_head *head, dlist_node *node)
Definition: ilist.h:713
#define dclist_foreach_modify(iter, lhead)
Definition: ilist.h:910
Assert(fmt[strlen(fmt) - 1] !='\n')
void pgstat_request_entry_refs_gc(void)
Definition: pgstat_shmem.c:624
bool pgstat_drop_entry(PgStat_Kind kind, Oid dboid, Oid objoid)
Definition: pgstat_shmem.c:854
PgStat_SubXactStatus * pgstat_get_xact_stack_level(int nest_level)
Definition: pgstat_xact.c:237
xl_xact_stats_item item
Definition: pgstat_xact.c:24
dlist_node * cur
Definition: ilist.h:200

References Assert(), dlist_mutable_iter::cur, xl_xact_stats_item::dboid, dclist_container, dclist_count(), dclist_delete_from(), dclist_foreach_modify, dclist_push_tail(), PgStat_PendingDroppedStatsItem::is_create, PgStat_PendingDroppedStatsItem::item, xl_xact_stats_item::kind, PgStat_PendingDroppedStatsItem::node, xl_xact_stats_item::objoid, PgStat_SubXactStatus::pending_drops, pfree(), pgstat_drop_entry(), pgstat_get_xact_stack_level(), and pgstat_request_entry_refs_gc().

Referenced by AtEOSubXact_PgStat().

◆ AtEOXact_PgStat()

void AtEOXact_PgStat ( bool  isCommit,
bool  parallel 
)

Definition at line 41 of file pgstat_xact.c.

42 {
43  PgStat_SubXactStatus *xact_state;
44 
45  AtEOXact_PgStat_Database(isCommit, parallel);
46 
47  /* handle transactional stats information */
48  xact_state = pgStatXactStack;
49  if (xact_state != NULL)
50  {
51  Assert(xact_state->nest_level == 1);
52  Assert(xact_state->prev == NULL);
53 
54  AtEOXact_PgStat_Relations(xact_state, isCommit);
55  AtEOXact_PgStat_DroppedStats(xact_state, isCommit);
56  }
57  pgStatXactStack = NULL;
58 
59  /* Make sure any stats snapshot is thrown away */
61 }
void pgstat_clear_snapshot(void)
Definition: pgstat.c:752
void AtEOXact_PgStat_Database(bool isCommit, bool parallel)
void AtEOXact_PgStat_Relations(PgStat_SubXactStatus *xact_state, bool isCommit)
static void AtEOXact_PgStat_DroppedStats(PgStat_SubXactStatus *xact_state, bool isCommit)
Definition: pgstat_xact.c:68

References Assert(), AtEOXact_PgStat_Database(), AtEOXact_PgStat_DroppedStats(), AtEOXact_PgStat_Relations(), PgStat_SubXactStatus::nest_level, pgstat_clear_snapshot(), pgStatXactStack, and PgStat_SubXactStatus::prev.

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

◆ AtEOXact_PgStat_DroppedStats()

static void AtEOXact_PgStat_DroppedStats ( PgStat_SubXactStatus xact_state,
bool  isCommit 
)
static

Definition at line 68 of file pgstat_xact.c.

69 {
70  dlist_mutable_iter iter;
71  int not_freed_count = 0;
72 
73  if (dclist_count(&xact_state->pending_drops) == 0)
74  return;
75 
76  dclist_foreach_modify(iter, &xact_state->pending_drops)
77  {
80  xl_xact_stats_item *it = &pending->item;
81 
82  if (isCommit && !pending->is_create)
83  {
84  /*
85  * Transaction that dropped an object committed. Drop the stats
86  * too.
87  */
88  if (!pgstat_drop_entry(it->kind, it->dboid, it->objoid))
89  not_freed_count++;
90  }
91  else if (!isCommit && pending->is_create)
92  {
93  /*
94  * Transaction that created an object aborted. Drop the stats
95  * associated with the object.
96  */
97  if (!pgstat_drop_entry(it->kind, it->dboid, it->objoid))
98  not_freed_count++;
99  }
100 
101  dclist_delete_from(&xact_state->pending_drops, &pending->node);
102  pfree(pending);
103  }
104 
105  if (not_freed_count > 0)
107 }

References dlist_mutable_iter::cur, xl_xact_stats_item::dboid, dclist_container, dclist_count(), dclist_delete_from(), dclist_foreach_modify, PgStat_PendingDroppedStatsItem::is_create, PgStat_PendingDroppedStatsItem::item, xl_xact_stats_item::kind, PgStat_PendingDroppedStatsItem::node, xl_xact_stats_item::objoid, PgStat_SubXactStatus::pending_drops, pfree(), pgstat_drop_entry(), and pgstat_request_entry_refs_gc().

Referenced by AtEOXact_PgStat().

◆ AtPrepare_PgStat()

void AtPrepare_PgStat ( void  )

Definition at line 190 of file pgstat_xact.c.

191 {
192  PgStat_SubXactStatus *xact_state;
193 
194  xact_state = pgStatXactStack;
195  if (xact_state != NULL)
196  {
197  Assert(xact_state->nest_level == 1);
198  Assert(xact_state->prev == NULL);
199 
200  AtPrepare_PgStat_Relations(xact_state);
201  }
202 }
void AtPrepare_PgStat_Relations(PgStat_SubXactStatus *xact_state)

References Assert(), AtPrepare_PgStat_Relations(), PgStat_SubXactStatus::nest_level, pgStatXactStack, and PgStat_SubXactStatus::prev.

Referenced by PrepareTransaction().

◆ create_drop_transactional_internal()

static void create_drop_transactional_internal ( PgStat_Kind  kind,
Oid  dboid,
Oid  objoid,
bool  is_create 
)
static

Definition at line 333 of file pgstat_xact.c.

334 {
335  int nest_level = GetCurrentTransactionNestLevel();
336  PgStat_SubXactStatus *xact_state;
339 
340  xact_state = pgstat_get_xact_stack_level(nest_level);
341 
342  drop->is_create = is_create;
343  drop->item.kind = kind;
344  drop->item.dboid = dboid;
345  drop->item.objoid = objoid;
346 
347  dclist_push_tail(&xact_state->pending_drops, &drop->node);
348 }
MemoryContext TopTransactionContext
Definition: mcxt.c:135
void * MemoryContextAlloc(MemoryContext context, Size size)
Definition: mcxt.c:994
int GetCurrentTransactionNestLevel(void)
Definition: xact.c:913

References xl_xact_stats_item::dboid, dclist_push_tail(), GetCurrentTransactionNestLevel(), PgStat_PendingDroppedStatsItem::is_create, PgStat_PendingDroppedStatsItem::item, xl_xact_stats_item::kind, MemoryContextAlloc(), PgStat_PendingDroppedStatsItem::node, xl_xact_stats_item::objoid, PgStat_SubXactStatus::pending_drops, pgstat_get_xact_stack_level(), and TopTransactionContext.

Referenced by pgstat_create_transactional(), and pgstat_drop_transactional().

◆ pgstat_create_transactional()

void pgstat_create_transactional ( PgStat_Kind  kind,
Oid  dboid,
Oid  objoid 
)

Definition at line 358 of file pgstat_xact.c.

359 {
360  if (pgstat_get_entry_ref(kind, dboid, objoid, false, NULL))
361  {
363  errmsg("resetting existing statistics for kind %s, db=%u, oid=%u",
364  (pgstat_get_kind_info(kind))->name, dboid, objoid));
365 
366  pgstat_reset(kind, dboid, objoid);
367  }
368 
369  create_drop_transactional_internal(kind, dboid, objoid, /* create */ true);
370 }
int errmsg(const char *fmt,...)
Definition: elog.c:906
#define WARNING
Definition: elog.h:32
#define ereport(elevel,...)
Definition: elog.h:145
const char * name
Definition: encode.c:561
void pgstat_reset(PgStat_Kind kind, Oid dboid, Oid objoid)
Definition: pgstat.c:705
const PgStat_KindInfo * pgstat_get_kind_info(PgStat_Kind kind)
Definition: pgstat.c:1220
PgStat_EntryRef * pgstat_get_entry_ref(PgStat_Kind kind, Oid dboid, Oid objoid, bool create, bool *created_entry)
Definition: pgstat_shmem.c:393
static void create_drop_transactional_internal(PgStat_Kind kind, Oid dboid, Oid objoid, bool is_create)
Definition: pgstat_xact.c:333

References create_drop_transactional_internal(), ereport, errmsg(), name, pgstat_get_entry_ref(), pgstat_get_kind_info(), pgstat_reset(), and WARNING.

Referenced by pgstat_create_function(), pgstat_create_relation(), and pgstat_create_subscription().

◆ pgstat_drop_transactional()

void pgstat_drop_transactional ( PgStat_Kind  kind,
Oid  dboid,
Oid  objoid 
)

Definition at line 380 of file pgstat_xact.c.

381 {
382  create_drop_transactional_internal(kind, dboid, objoid, /* create */ false);
383 }

References create_drop_transactional_internal().

Referenced by pgstat_drop_database(), pgstat_drop_function(), pgstat_drop_relation(), and pgstat_drop_subscription().

◆ pgstat_execute_transactional_drops()

void pgstat_execute_transactional_drops ( int  ndrops,
struct xl_xact_stats_item items,
bool  is_redo 
)

Definition at line 313 of file pgstat_xact.c.

314 {
315  int not_freed_count = 0;
316 
317  if (ndrops == 0)
318  return;
319 
320  for (int i = 0; i < ndrops; i++)
321  {
322  xl_xact_stats_item *it = &items[i];
323 
324  if (!pgstat_drop_entry(it->kind, it->dboid, it->objoid))
325  not_freed_count++;
326  }
327 
328  if (not_freed_count > 0)
330 }
int i
Definition: isn.c:73

References xl_xact_stats_item::dboid, i, xl_xact_stats_item::kind, xl_xact_stats_item::objoid, pgstat_drop_entry(), and pgstat_request_entry_refs_gc().

Referenced by FinishPreparedTransaction(), xact_redo_abort(), and xact_redo_commit().

◆ pgstat_get_transactional_drops()

int pgstat_get_transactional_drops ( bool  isCommit,
xl_xact_stats_item **  items 
)

Definition at line 271 of file pgstat_xact.c.

272 {
274  int nitems = 0;
275  dlist_iter iter;
276 
277  if (xact_state == NULL)
278  return 0;
279 
280  /*
281  * We expect to be called for subtransaction abort (which logs a WAL
282  * record), but not for subtransaction commit (which doesn't).
283  */
284  Assert(!isCommit || xact_state->nest_level == 1);
285  Assert(!isCommit || xact_state->prev == NULL);
286 
287  *items = palloc(dclist_count(&xact_state->pending_drops)
288  * sizeof(xl_xact_stats_item));
289 
290  dclist_foreach(iter, &xact_state->pending_drops)
291  {
294 
295  if (isCommit && pending->is_create)
296  continue;
297  if (!isCommit && !pending->is_create)
298  continue;
299 
300  Assert(nitems < dclist_count(&xact_state->pending_drops));
301  (*items)[nitems++] = pending->item;
302  }
303 
304  return nitems;
305 }
#define dclist_foreach(iter, lhead)
Definition: ilist.h:907
void * palloc(Size size)
Definition: mcxt.c:1199
dlist_node * cur
Definition: ilist.h:179

References Assert(), dlist_iter::cur, dclist_container, dclist_count(), dclist_foreach, PgStat_PendingDroppedStatsItem::is_create, PgStat_PendingDroppedStatsItem::item, PgStat_SubXactStatus::nest_level, palloc(), PgStat_SubXactStatus::pending_drops, pgStatXactStack, and PgStat_SubXactStatus::prev.

Referenced by RecordTransactionAbort(), RecordTransactionCommit(), and StartPrepare().

◆ pgstat_get_xact_stack_level()

PgStat_SubXactStatus* pgstat_get_xact_stack_level ( int  nest_level)

Definition at line 237 of file pgstat_xact.c.

238 {
239  PgStat_SubXactStatus *xact_state;
240 
241  xact_state = pgStatXactStack;
242  if (xact_state == NULL || xact_state->nest_level != nest_level)
243  {
244  xact_state = (PgStat_SubXactStatus *)
246  sizeof(PgStat_SubXactStatus));
247  dclist_init(&xact_state->pending_drops);
248  xact_state->nest_level = nest_level;
249  xact_state->prev = pgStatXactStack;
250  xact_state->first = NULL;
251  pgStatXactStack = xact_state;
252  }
253  return xact_state;
254 }
static void dclist_init(dclist_head *head)
Definition: ilist.h:621
PgStat_TableXactStatus * first

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

Referenced by add_tabstat_xact_level(), AtEOSubXact_PgStat_DroppedStats(), AtEOSubXact_PgStat_Relations(), and create_drop_transactional_internal().

◆ PostPrepare_PgStat()

void PostPrepare_PgStat ( void  )

Definition at line 210 of file pgstat_xact.c.

211 {
212  PgStat_SubXactStatus *xact_state;
213 
214  /*
215  * We don't bother to free any of the transactional state, since it's all
216  * in TopTransactionContext and will go away anyway.
217  */
218  xact_state = pgStatXactStack;
219  if (xact_state != NULL)
220  {
221  Assert(xact_state->nest_level == 1);
222  Assert(xact_state->prev == NULL);
223 
224  PostPrepare_PgStat_Relations(xact_state);
225  }
226  pgStatXactStack = NULL;
227 
228  /* Make sure any stats snapshot is thrown away */
230 }
void PostPrepare_PgStat_Relations(PgStat_SubXactStatus *xact_state)

References Assert(), PgStat_SubXactStatus::nest_level, pgstat_clear_snapshot(), pgStatXactStack, PostPrepare_PgStat_Relations(), and PgStat_SubXactStatus::prev.

Referenced by PrepareTransaction().

Variable Documentation

◆ pgStatXactStack