#include "postgres.h"
#include "utils/pgstat_internal.h"

Include dependency graph for pgstat_checkpointer.c:

Macros
#define	CHECKPOINTER_ACC(fld) stats_shmem->stats.fld += PendingCheckpointerStats.fld

#define	CHECKPOINTER_COMP(fld) pgStatLocal.snapshot.checkpointer.fld -= reset.fld;

Functions
void	pgstat_report_checkpointer (void)

PgStat_CheckpointerStats *	pgstat_fetch_stat_checkpointer (void)

void	pgstat_checkpointer_reset_all_cb (TimestampTz ts)

void	pgstat_checkpointer_snapshot_cb (void)

Variables
PgStat_CheckpointerStats	PendingCheckpointerStats = {0}

Macro Definition Documentation

◆ CHECKPOINTER_ACC

#define CHECKPOINTER_ACC ( fld ) stats_shmem->stats.fld += PendingCheckpointerStats.fld

◆ CHECKPOINTER_COMP

#define CHECKPOINTER_COMP ( fld ) pgStatLocal.snapshot.checkpointer.fld -= reset.fld;

Function Documentation

◆ pgstat_checkpointer_reset_all_cb()

void pgstat_checkpointer_reset_all_cb ( TimestampTz ts )

Definition at line 85 of file pgstat_checkpointer.c.

 {
     PgStatShared_Checkpointer *stats_shmem = &pgStatLocal.shmem->checkpointer;
  
     /* see explanation above PgStatShared_Checkpointer for the reset protocol */
     LWLockAcquire(&stats_shmem->lock, LW_EXCLUSIVE);
     pgstat_copy_changecounted_stats(&stats_shmem->reset_offset,
                                     &stats_shmem->stats,
                                     sizeof(stats_shmem->stats),
                                     &stats_shmem->changecount);
     stats_shmem->stats.stat_reset_timestamp = ts;
     LWLockRelease(&stats_shmem->lock);
 }

References PgStatShared_Checkpointer::changecount, PgStat_ShmemControl::checkpointer, PgStatShared_Checkpointer::lock, LW_EXCLUSIVE, LWLockAcquire(), LWLockRelease(), pgstat_copy_changecounted_stats(), pgStatLocal, PgStatShared_Checkpointer::reset_offset, PgStat_LocalState::shmem, PgStat_CheckpointerStats::stat_reset_timestamp, and PgStatShared_Checkpointer::stats.

◆ pgstat_checkpointer_snapshot_cb()

void pgstat_checkpointer_snapshot_cb ( void )

Definition at line 100 of file pgstat_checkpointer.c.

 {
     PgStatShared_Checkpointer *stats_shmem = &pgStatLocal.shmem->checkpointer;
     PgStat_CheckpointerStats *reset_offset = &stats_shmem->reset_offset;
     PgStat_CheckpointerStats reset;
  
     pgstat_copy_changecounted_stats(&pgStatLocal.snapshot.checkpointer,
                                     &stats_shmem->stats,
                                     sizeof(stats_shmem->stats),
                                     &stats_shmem->changecount);
  
     LWLockAcquire(&stats_shmem->lock, LW_SHARED);
     memcpy(&reset, reset_offset, sizeof(stats_shmem->stats));
     LWLockRelease(&stats_shmem->lock);
  
     /* compensate by reset offsets */
 #define CHECKPOINTER_COMP(fld) pgStatLocal.snapshot.checkpointer.fld -= reset.fld;
     CHECKPOINTER_COMP(num_timed);
     CHECKPOINTER_COMP(num_requested);
     CHECKPOINTER_COMP(write_time);
     CHECKPOINTER_COMP(sync_time);
     CHECKPOINTER_COMP(buffers_written);
 #undef CHECKPOINTER_COMP
 }

References PgStatShared_Checkpointer::changecount, PgStat_ShmemControl::checkpointer, PgStat_Snapshot::checkpointer, CHECKPOINTER_COMP, PgStatShared_Checkpointer::lock, LW_SHARED, LWLockAcquire(), LWLockRelease(), pgstat_copy_changecounted_stats(), pgStatLocal, reset(), PgStatShared_Checkpointer::reset_offset, PgStat_LocalState::shmem, PgStat_LocalState::snapshot, and PgStatShared_Checkpointer::stats.

◆ pgstat_fetch_stat_checkpointer()

PgStat_CheckpointerStats* pgstat_fetch_stat_checkpointer ( void )

Definition at line 77 of file pgstat_checkpointer.c.

 {
     pgstat_snapshot_fixed(PGSTAT_KIND_CHECKPOINTER);
  
     return &pgStatLocal.snapshot.checkpointer;
 }

References PgStat_Snapshot::checkpointer, PGSTAT_KIND_CHECKPOINTER, pgstat_snapshot_fixed(), pgStatLocal, and PgStat_LocalState::snapshot.

Referenced by pg_stat_get_checkpointer_buffers_written(), pg_stat_get_checkpointer_num_requested(), pg_stat_get_checkpointer_num_timed(), pg_stat_get_checkpointer_stat_reset_time(), pg_stat_get_checkpointer_sync_time(), and pg_stat_get_checkpointer_write_time().

◆ pgstat_report_checkpointer()

void pgstat_report_checkpointer ( void )

Definition at line 30 of file pgstat_checkpointer.c.

 {
     /* We assume this initializes to zeroes */
     static const PgStat_CheckpointerStats all_zeroes;
     PgStatShared_Checkpointer *stats_shmem = &pgStatLocal.shmem->checkpointer;
  
     Assert(!pgStatLocal.shmem->is_shutdown);
     pgstat_assert_is_up();
  
     /*
      * This function can be called even if nothing at all has happened. In
      * this case, avoid unnecessarily modifying the stats entry.
      */
     if (memcmp(&PendingCheckpointerStats, &all_zeroes,
                sizeof(all_zeroes)) == 0)
         return;
  
     pgstat_begin_changecount_write(&stats_shmem->changecount);
  
 #define CHECKPOINTER_ACC(fld) stats_shmem->stats.fld += PendingCheckpointerStats.fld
     CHECKPOINTER_ACC(num_timed);
     CHECKPOINTER_ACC(num_requested);
     CHECKPOINTER_ACC(write_time);
     CHECKPOINTER_ACC(sync_time);
     CHECKPOINTER_ACC(buffers_written);
 #undef CHECKPOINTER_ACC
  
     pgstat_end_changecount_write(&stats_shmem->changecount);
  
     /*
      * Clear out the statistics buffer, so it can be re-used.
      */
     MemSet(&PendingCheckpointerStats, 0, sizeof(PendingCheckpointerStats));
  
     /*
      * Report IO statistics
      */
     pgstat_flush_io(false);
 }