112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
/* -------------------------------------------------------------------------
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*
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* pgstat_archiver.c
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* Implementation of archiver statistics.
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*
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* This file contains the implementation of archiver statistics. It is kept
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* separate from pgstat.c to enforce the line between the statistics access /
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* storage implementation and the details about individual types of
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* statistics.
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*
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* Copyright (c) 2001-2023, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* src/backend/utils/activity/pgstat_archiver.c
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* -------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "utils/pgstat_internal.h"
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#include "utils/timestamp.h"
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/*
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* Report archiver statistics
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*/
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void
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pgstat_report_archiver(const char *xlog, bool failed)
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{
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PgStatShared_Archiver *stats_shmem = &pgStatLocal.shmem->archiver;
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TimestampTz now = GetCurrentTimestamp();
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pgstat_begin_changecount_write(&stats_shmem->changecount);
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if (failed)
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{
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++stats_shmem->stats.failed_count;
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memcpy(&stats_shmem->stats.last_failed_wal, xlog,
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sizeof(stats_shmem->stats.last_failed_wal));
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stats_shmem->stats.last_failed_timestamp = now;
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}
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else
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{
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++stats_shmem->stats.archived_count;
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memcpy(&stats_shmem->stats.last_archived_wal, xlog,
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sizeof(stats_shmem->stats.last_archived_wal));
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stats_shmem->stats.last_archived_timestamp = now;
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}
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pgstat_end_changecount_write(&stats_shmem->changecount);
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}
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/*
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* Support function for the SQL-callable pgstat* functions. Returns
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* a pointer to the archiver statistics struct.
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*/
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PgStat_ArchiverStats *
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pgstat_fetch_stat_archiver(void)
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{
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pgstat_snapshot_fixed(PGSTAT_KIND_ARCHIVER);
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return &pgStatLocal.snapshot.archiver;
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}
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void
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pgstat_archiver_reset_all_cb(TimestampTz ts)
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{
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PgStatShared_Archiver *stats_shmem = &pgStatLocal.shmem->archiver;
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/* see explanation above PgStatShared_Archiver for the reset protocol */
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LWLockAcquire(&stats_shmem->lock, LW_EXCLUSIVE);
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pgstat_copy_changecounted_stats(&stats_shmem->reset_offset,
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&stats_shmem->stats,
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sizeof(stats_shmem->stats),
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&stats_shmem->changecount);
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stats_shmem->stats.stat_reset_timestamp = ts;
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LWLockRelease(&stats_shmem->lock);
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}
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void
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pgstat_archiver_snapshot_cb(void)
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{
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PgStatShared_Archiver *stats_shmem = &pgStatLocal.shmem->archiver;
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PgStat_ArchiverStats *stat_snap = &pgStatLocal.snapshot.archiver;
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PgStat_ArchiverStats *reset_offset = &stats_shmem->reset_offset;
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PgStat_ArchiverStats reset;
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pgstat_copy_changecounted_stats(stat_snap,
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&stats_shmem->stats,
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sizeof(stats_shmem->stats),
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&stats_shmem->changecount);
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LWLockAcquire(&stats_shmem->lock, LW_SHARED);
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memcpy(&reset, reset_offset, sizeof(stats_shmem->stats));
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LWLockRelease(&stats_shmem->lock);
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/* compensate by reset offsets */
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if (stat_snap->archived_count == reset.archived_count)
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{
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stat_snap->last_archived_wal[0] = 0;
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stat_snap->last_archived_timestamp = 0;
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}
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stat_snap->archived_count -= reset.archived_count;
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if (stat_snap->failed_count == reset.failed_count)
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{
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stat_snap->last_failed_wal[0] = 0;
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stat_snap->last_failed_timestamp = 0;
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}
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stat_snap->failed_count -= reset.failed_count;
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}
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