PostgreSQL Source Code git master
Macros | Functions | Variables
pgstat_checkpointer.c File Reference
#include "postgres.h"
#include "utils/memutils.h"
#include "utils/pgstat_internal.h"
Include dependency graph for pgstat_checkpointer.c:

Go to the source code of this file.

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_init_shmem_cb (void *stats)
 
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_init_shmem_cb()

void pgstat_checkpointer_init_shmem_cb ( void *  stats )

Definition at line 89 of file pgstat_checkpointer.c.

90{
92
93 LWLockInitialize(&stats_shmem->lock, LWTRANCHE_PGSTATS_DATA);
94}
void LWLockInitialize(LWLock *lock, int tranche_id)
Definition: lwlock.c:698
LWLock lock

References PgStatShared_Checkpointer::lock, and LWLockInitialize().

◆ pgstat_checkpointer_reset_all_cb()

void pgstat_checkpointer_reset_all_cb ( TimestampTz  ts )

Definition at line 97 of file pgstat_checkpointer.c.

98{
100
101 /* see explanation above PgStatShared_Checkpointer for the reset protocol */
102 LWLockAcquire(&stats_shmem->lock, LW_EXCLUSIVE);
104 &stats_shmem->stats,
105 sizeof(stats_shmem->stats),
106 &stats_shmem->changecount);
107 stats_shmem->stats.stat_reset_timestamp = ts;
108 LWLockRelease(&stats_shmem->lock);
109}
bool LWLockAcquire(LWLock *lock, LWLockMode mode)
Definition: lwlock.c:1174
void LWLockRelease(LWLock *lock)
Definition: lwlock.c:1894
@ LW_EXCLUSIVE
Definition: lwlock.h:112
PgStat_LocalState pgStatLocal
Definition: pgstat.c:212
static void pgstat_copy_changecounted_stats(void *dst, void *src, size_t len, uint32 *cc)
uint32 changecount
PgStat_CheckpointerStats reset_offset
PgStat_CheckpointerStats stats
TimestampTz stat_reset_timestamp
Definition: pgstat.h:266
PgStat_ShmemControl * shmem
PgStatShared_Checkpointer checkpointer

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 112 of file pgstat_checkpointer.c.

113{
115 PgStat_CheckpointerStats *reset_offset = &stats_shmem->reset_offset;
117
119 &stats_shmem->stats,
120 sizeof(stats_shmem->stats),
121 &stats_shmem->changecount);
122
123 LWLockAcquire(&stats_shmem->lock, LW_SHARED);
124 memcpy(&reset, reset_offset, sizeof(stats_shmem->stats));
125 LWLockRelease(&stats_shmem->lock);
126
127 /* compensate by reset offsets */
128#define CHECKPOINTER_COMP(fld) pgStatLocal.snapshot.checkpointer.fld -= reset.fld;
129 CHECKPOINTER_COMP(num_timed);
130 CHECKPOINTER_COMP(num_requested);
131 CHECKPOINTER_COMP(num_performed);
132 CHECKPOINTER_COMP(restartpoints_timed);
133 CHECKPOINTER_COMP(restartpoints_requested);
134 CHECKPOINTER_COMP(restartpoints_performed);
135 CHECKPOINTER_COMP(write_time);
136 CHECKPOINTER_COMP(sync_time);
137 CHECKPOINTER_COMP(buffers_written);
138 CHECKPOINTER_COMP(slru_written);
139#undef CHECKPOINTER_COMP
140}
@ LW_SHARED
Definition: lwlock.h:113
#define CHECKPOINTER_COMP(fld)
void reset(void)
Definition: sql-declare.c:600
Definition: pgstat.h:255
PgStat_Snapshot snapshot
PgStat_CheckpointerStats checkpointer

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 81 of file pgstat_checkpointer.c.

82{
84
86}
void pgstat_snapshot_fixed(PgStat_Kind kind)
Definition: pgstat.c:1059
#define PGSTAT_KIND_CHECKPOINTER
Definition: pgstat_kind.h:37

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_performed(), pg_stat_get_checkpointer_num_requested(), pg_stat_get_checkpointer_num_timed(), pg_stat_get_checkpointer_restartpoints_performed(), pg_stat_get_checkpointer_restartpoints_requested(), pg_stat_get_checkpointer_restartpoints_timed(), pg_stat_get_checkpointer_slru_written(), 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 31 of file pgstat_checkpointer.c.

32{
34
37
38 /*
39 * This function can be called even if nothing at all has happened. In
40 * this case, avoid unnecessarily modifying the stats entry.
41 */
43 sizeof(struct PgStat_CheckpointerStats)))
44 return;
45
47
48#define CHECKPOINTER_ACC(fld) stats_shmem->stats.fld += PendingCheckpointerStats.fld
49 CHECKPOINTER_ACC(num_timed);
50 CHECKPOINTER_ACC(num_requested);
51 CHECKPOINTER_ACC(num_performed);
52 CHECKPOINTER_ACC(restartpoints_timed);
53 CHECKPOINTER_ACC(restartpoints_requested);
54 CHECKPOINTER_ACC(restartpoints_performed);
55 CHECKPOINTER_ACC(write_time);
56 CHECKPOINTER_ACC(sync_time);
57 CHECKPOINTER_ACC(buffers_written);
58 CHECKPOINTER_ACC(slru_written);
59#undef CHECKPOINTER_ACC
60
62
63 /*
64 * Clear out the statistics buffer, so it can be re-used.
65 */
67
68 /*
69 * Report IO statistics
70 */
71 pgstat_flush_io(false);
72}
#define MemSet(start, val, len)
Definition: c.h:1019
Assert(PointerIsAligned(start, uint64))
static bool pg_memory_is_all_zeros(const void *ptr, size_t len)
Definition: memutils.h:219
PgStat_CheckpointerStats PendingCheckpointerStats
#define CHECKPOINTER_ACC(fld)
static void pgstat_end_changecount_write(uint32 *cc)
#define pgstat_assert_is_up()
static void pgstat_begin_changecount_write(uint32 *cc)
void pgstat_flush_io(bool nowait)
Definition: pgstat_io.c:175
bool is_shutdown

References Assert(), PgStatShared_Checkpointer::changecount, PgStat_ShmemControl::checkpointer, CHECKPOINTER_ACC, PgStat_ShmemControl::is_shutdown, MemSet, PendingCheckpointerStats, pg_memory_is_all_zeros(), pgstat_assert_is_up, pgstat_begin_changecount_write(), pgstat_end_changecount_write(), pgstat_flush_io(), pgStatLocal, and PgStat_LocalState::shmem.

Referenced by CheckpointerMain(), and CheckpointWriteDelay().

Variable Documentation

◆ PendingCheckpointerStats

PgStat_CheckpointerStats PendingCheckpointerStats = {0}

Definition at line 24 of file pgstat_checkpointer.c.

Referenced by BufferSync(), CheckpointerMain(), LogCheckpointEnd(), pgstat_report_checkpointer(), and SlruInternalWritePage().

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