pgstat_archiver.c File Reference

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

Include dependency graph for pgstat_archiver.c:

Go to the source code of this file.

Functions
void	pgstat_report_archiver (const char *xlog, bool failed)
PgStat_ArchiverStats *	pgstat_fetch_stat_archiver (void)
void	pgstat_archiver_init_shmem_cb (void *stats)
void	pgstat_archiver_reset_all_cb (TimestampTz ts)
void	pgstat_archiver_snapshot_cb (void)

Function Documentation

pgstat_archiver_init_shmem_cb()

void pgstat_archiver_init_shmem_cb

(

void *

stats

)

Definition at line 66 of file pgstat_archiver.c.

{
    PgStatShared_Archiver *stats_shmem = (PgStatShared_Archiver *) stats;
 
    LWLockInitialize(&stats_shmem->lock, LWTRANCHE_PGSTATS_DATA);
}

References PgStatShared_Archiver::lock, LWLockInitialize(), and LWTRANCHE_PGSTATS_DATA.

pgstat_archiver_reset_all_cb()

void pgstat_archiver_reset_all_cb

(

TimestampTz

ts

)

Definition at line 74 of file pgstat_archiver.c.

{
    PgStatShared_Archiver *stats_shmem = &pgStatLocal.shmem->archiver;
 
    /* see explanation above PgStatShared_Archiver 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 PgStat_ShmemControl::archiver, PgStatShared_Archiver::changecount, PgStatShared_Archiver::lock, LW_EXCLUSIVE, LWLockAcquire(), LWLockRelease(), pgstat_copy_changecounted_stats(), pgStatLocal, PgStatShared_Archiver::reset_offset, PgStat_LocalState::shmem, PgStat_ArchiverStats::stat_reset_timestamp, and PgStatShared_Archiver::stats.

pgstat_archiver_snapshot_cb()

void pgstat_archiver_snapshot_cb

(

void

)

Definition at line 89 of file pgstat_archiver.c.

{
    PgStatShared_Archiver *stats_shmem = &pgStatLocal.shmem->archiver;
    PgStat_ArchiverStats *stat_snap = &pgStatLocal.snapshot.archiver;
    PgStat_ArchiverStats *reset_offset = &stats_shmem->reset_offset;
    PgStat_ArchiverStats reset;
 
    pgstat_copy_changecounted_stats(stat_snap,
                                    &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 */
    if (stat_snap->archived_count == reset.archived_count)
    {
        stat_snap->last_archived_wal[0] = 0;
        stat_snap->last_archived_timestamp = 0;
    }
    stat_snap->archived_count -= reset.archived_count;
 
    if (stat_snap->failed_count == reset.failed_count)
    {
        stat_snap->last_failed_wal[0] = 0;
        stat_snap->last_failed_timestamp = 0;
    }
    stat_snap->failed_count -= reset.failed_count;
}

References PgStat_ArchiverStats::archived_count, PgStat_ShmemControl::archiver, PgStat_Snapshot::archiver, PgStatShared_Archiver::changecount, PgStat_ArchiverStats::failed_count, PgStat_ArchiverStats::last_archived_timestamp, PgStat_ArchiverStats::last_archived_wal, PgStat_ArchiverStats::last_failed_timestamp, PgStat_ArchiverStats::last_failed_wal, PgStatShared_Archiver::lock, LW_SHARED, LWLockAcquire(), LWLockRelease(), pgstat_copy_changecounted_stats(), pgStatLocal, reset(), PgStatShared_Archiver::reset_offset, PgStat_LocalState::shmem, PgStat_LocalState::snapshot, and PgStatShared_Archiver::stats.

pgstat_fetch_stat_archiver()

PgStat_ArchiverStats* pgstat_fetch_stat_archiver

(

void

)

Definition at line 58 of file pgstat_archiver.c.

{
    pgstat_snapshot_fixed(PGSTAT_KIND_ARCHIVER);
 
    return &pgStatLocal.snapshot.archiver;
}

References PgStat_Snapshot::archiver, PGSTAT_KIND_ARCHIVER, pgstat_snapshot_fixed(), pgStatLocal, and PgStat_LocalState::snapshot.

Referenced by pg_stat_get_archiver().

pgstat_report_archiver()

void pgstat_report_archiver	(	const char *	xlog,
		bool	failed
	)

Definition at line 28 of file pgstat_archiver.c.

{
    PgStatShared_Archiver *stats_shmem = &pgStatLocal.shmem->archiver;
    TimestampTz now = GetCurrentTimestamp();
 
    pgstat_begin_changecount_write(&stats_shmem->changecount);
 
    if (failed)
    {
        ++stats_shmem->stats.failed_count;
        memcpy(&stats_shmem->stats.last_failed_wal, xlog,
               sizeof(stats_shmem->stats.last_failed_wal));
        stats_shmem->stats.last_failed_timestamp = now;
    }
    else
    {
        ++stats_shmem->stats.archived_count;
        memcpy(&stats_shmem->stats.last_archived_wal, xlog,
               sizeof(stats_shmem->stats.last_archived_wal));
        stats_shmem->stats.last_archived_timestamp = now;
    }
 
    pgstat_end_changecount_write(&stats_shmem->changecount);
}

References PgStat_ArchiverStats::archived_count, PgStat_ShmemControl::archiver, PgStatShared_Archiver::changecount, PgStat_ArchiverStats::failed_count, GetCurrentTimestamp(), PgStat_ArchiverStats::last_archived_timestamp, PgStat_ArchiverStats::last_archived_wal, PgStat_ArchiverStats::last_failed_timestamp, PgStat_ArchiverStats::last_failed_wal, now(), pgstat_begin_changecount_write(), pgstat_end_changecount_write(), pgStatLocal, PgStat_LocalState::shmem, and PgStatShared_Archiver::stats.

Referenced by pgarch_ArchiverCopyLoop().