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Publish checkpoint timing information to pg_stat_bgwriter.

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Greg Smith, Peter Geoghegan, and Robert Haas
This commit is contained in:
Robert Haas
2012-04-05 14:03:21 -04:00
parent a75b08066a
commit b736aef2ec
10 changed files with 81 additions and 26 deletions
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30
src/backend/access/transam/xlog.c
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@ -7511,9 +7511,6 @@ LogCheckpointEnd(bool restartpoint)
CheckpointStats.ckpt_end_t = GetCurrentTimestamp();
TimestampDifference(CheckpointStats.ckpt_start_t,
CheckpointStats.ckpt_end_t,
&total_secs, &total_usecs);
TimestampDifference(CheckpointStats.ckpt_write_t,
CheckpointStats.ckpt_sync_t,
@ -7523,6 +7520,23 @@ LogCheckpointEnd(bool restartpoint)
CheckpointStats.ckpt_sync_end_t,
&sync_secs, &sync_usecs);
/* Record checkpoint timing summary data. */
BgWriterStats.m_checkpoint_write_time +=
write_secs * 1000 + write_usecs / 1000;
BgWriterStats.m_checkpoint_sync_time +=
sync_secs * 1000 + sync_usecs / 1000;
/*
* All of the published timing statistics are accounted for. Only
* continue if a log message is to be written.
*/
if (!log_checkpoints)
return;
TimestampDifference(CheckpointStats.ckpt_start_t,
CheckpointStats.ckpt_end_t,
&total_secs, &total_usecs);
/*
* Timing values returned from CheckpointStats are in microseconds.
* Convert to the second plus microsecond form that TimestampDifference
@ -7971,9 +7985,8 @@ CreateCheckPoint(int flags)
if (!RecoveryInProgress())
TruncateSUBTRANS(GetOldestXmin(true, false));
/* All real work is done, but log before releasing lock. */
if (log_checkpoints)
LogCheckpointEnd(false);
/* Real work is done, but log and update stats before releasing lock. */
LogCheckpointEnd(false);
TRACE_POSTGRESQL_CHECKPOINT_DONE(CheckpointStats.ckpt_bufs_written,
NBuffers,
@ -8237,9 +8250,8 @@ CreateRestartPoint(int flags)
if (EnableHotStandby)
TruncateSUBTRANS(GetOldestXmin(true, false));
/* All real work is done, but log before releasing lock. */
if (log_checkpoints)
LogCheckpointEnd(true);
/* Real work is done, but log and update before releasing lock. */
LogCheckpointEnd(true);
xtime = GetLatestXTime();
ereport((log_checkpoints ? LOG : DEBUG2),