LCOV - code coverage report
Current view: top level - src/backend/utils/activity - pgstat_archiver.c (source / functions) Hit Total Coverage
Test: PostgreSQL 16devel Lines: 39 42 92.9 %
Date: 2022-08-17 04:10:37 Functions: 4 4 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -------------------------------------------------------------------------
       2             :  *
       3             :  * pgstat_archiver.c
       4             :  *    Implementation of archiver statistics.
       5             :  *
       6             :  * This file contains the implementation of archiver statistics. It is kept
       7             :  * separate from pgstat.c to enforce the line between the statistics access /
       8             :  * storage implementation and the details about individual types of
       9             :  * statistics.
      10             :  *
      11             :  * Copyright (c) 2001-2022, PostgreSQL Global Development Group
      12             :  *
      13             :  * IDENTIFICATION
      14             :  *    src/backend/utils/activity/pgstat_archiver.c
      15             :  * -------------------------------------------------------------------------
      16             :  */
      17             : 
      18             : #include "postgres.h"
      19             : 
      20             : #include "utils/pgstat_internal.h"
      21             : #include "utils/timestamp.h"
      22             : 
      23             : 
      24             : /*
      25             :  * Report archiver statistics
      26             :  */
      27             : void
      28          34 : pgstat_report_archiver(const char *xlog, bool failed)
      29             : {
      30          34 :     PgStatShared_Archiver *stats_shmem = &pgStatLocal.shmem->archiver;
      31          34 :     TimestampTz now = GetCurrentTimestamp();
      32             : 
      33          34 :     pgstat_begin_changecount_write(&stats_shmem->changecount);
      34             : 
      35          34 :     if (failed)
      36             :     {
      37           0 :         ++stats_shmem->stats.failed_count;
      38           0 :         memcpy(&stats_shmem->stats.last_failed_wal, xlog,
      39             :                sizeof(stats_shmem->stats.last_failed_wal));
      40           0 :         stats_shmem->stats.last_failed_timestamp = now;
      41             :     }
      42             :     else
      43             :     {
      44          34 :         ++stats_shmem->stats.archived_count;
      45          34 :         memcpy(&stats_shmem->stats.last_archived_wal, xlog,
      46             :                sizeof(stats_shmem->stats.last_archived_wal));
      47          34 :         stats_shmem->stats.last_archived_timestamp = now;
      48             :     }
      49             : 
      50          34 :     pgstat_end_changecount_write(&stats_shmem->changecount);
      51          34 : }
      52             : 
      53             : /*
      54             :  * Support function for the SQL-callable pgstat* functions. Returns
      55             :  * a pointer to the archiver statistics struct.
      56             :  */
      57             : PgStat_ArchiverStats *
      58          44 : pgstat_fetch_stat_archiver(void)
      59             : {
      60          44 :     pgstat_snapshot_fixed(PGSTAT_KIND_ARCHIVER);
      61             : 
      62          44 :     return &pgStatLocal.snapshot.archiver;
      63             : }
      64             : 
      65             : void
      66         816 : pgstat_archiver_reset_all_cb(TimestampTz ts)
      67             : {
      68         816 :     PgStatShared_Archiver *stats_shmem = &pgStatLocal.shmem->archiver;
      69             : 
      70             :     /* see explanation above PgStatShared_Archiver for the reset protocol */
      71         816 :     LWLockAcquire(&stats_shmem->lock, LW_EXCLUSIVE);
      72         816 :     pgstat_copy_changecounted_stats(&stats_shmem->reset_offset,
      73         816 :                                     &stats_shmem->stats,
      74             :                                     sizeof(stats_shmem->stats),
      75             :                                     &stats_shmem->changecount);
      76         816 :     stats_shmem->stats.stat_reset_timestamp = ts;
      77         816 :     LWLockRelease(&stats_shmem->lock);
      78         816 : }
      79             : 
      80             : void
      81        1854 : pgstat_archiver_snapshot_cb(void)
      82             : {
      83        1854 :     PgStatShared_Archiver *stats_shmem = &pgStatLocal.shmem->archiver;
      84        1854 :     PgStat_ArchiverStats *stat_snap = &pgStatLocal.snapshot.archiver;
      85        1854 :     PgStat_ArchiverStats *reset_offset = &stats_shmem->reset_offset;
      86             :     PgStat_ArchiverStats reset;
      87             : 
      88        1854 :     pgstat_copy_changecounted_stats(stat_snap,
      89        1854 :                                     &stats_shmem->stats,
      90             :                                     sizeof(stats_shmem->stats),
      91             :                                     &stats_shmem->changecount);
      92             : 
      93        1854 :     LWLockAcquire(&stats_shmem->lock, LW_SHARED);
      94        1854 :     memcpy(&reset, reset_offset, sizeof(stats_shmem->stats));
      95        1854 :     LWLockRelease(&stats_shmem->lock);
      96             : 
      97             :     /* compensate by reset offsets */
      98        1854 :     if (stat_snap->archived_count == reset.archived_count)
      99             :     {
     100        1824 :         stat_snap->last_archived_wal[0] = 0;
     101        1824 :         stat_snap->last_archived_timestamp = 0;
     102             :     }
     103        1854 :     stat_snap->archived_count -= reset.archived_count;
     104             : 
     105        1854 :     if (stat_snap->failed_count == reset.failed_count)
     106             :     {
     107        1840 :         stat_snap->last_failed_wal[0] = 0;
     108        1840 :         stat_snap->last_failed_timestamp = 0;
     109             :     }
     110        1854 :     stat_snap->failed_count -= reset.failed_count;
     111        1854 : }

Generated by: LCOV version 1.14