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Report wait event for cost-based vacuum delay. 

Author: Justin Pryzby
Discussion: https://postgr.es/m/20200321040750.GD13662@telsasoft.com
This commit is contained in:
Andres Freund 2020-03-23 22:19:56 -07:00
parent 496ee647ec
commit cedffbdb8b
4 changed files with 9 additions and 1 deletions
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2
doc/src/sgml/monitoring.sgml
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@ -1515,6 +1515,8 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
(<filename>pg_wal</filename>, archive or stream) before trying
again to retrieve WAL data, at recovery.
</entry>
<entry><literal>VacuumDelay</literal></entry>
<entry>Waiting in a cost-based vacuum delay point.</entry>
</row>
<row>
<entry morerows="68"><literal>IO</literal></entry>

2
src/backend/commands/vacuum.c
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@ -2019,7 +2019,9 @@ vacuum_delay_point(void)
if (msec > VacuumCostDelay * 4)
msec = VacuumCostDelay * 4;
pgstat_report_wait_start(WAIT_EVENT_VACUUM_DELAY);
pg_usleep((long) (msec * 1000));
pgstat_report_wait_end();
VacuumCostBalance = 0;

3
src/backend/postmaster/pgstat.c
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@ -3830,6 +3830,9 @@ pgstat_get_wait_timeout(WaitEventTimeout w)
case WAIT_EVENT_RECOVERY_RETRIEVE_RETRY_INTERVAL:
event_name = "RecoveryRetrieveRetryInterval";
break;
case WAIT_EVENT_VACUUM_DELAY:
event_name = "VacuumDelay";
break;
/* no default case, so that compiler will warn */
}

3
src/include/pgstat.h
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@ -850,7 +850,8 @@ typedef enum
WAIT_EVENT_BASE_BACKUP_THROTTLE = PG_WAIT_TIMEOUT,
WAIT_EVENT_PG_SLEEP,
WAIT_EVENT_RECOVERY_APPLY_DELAY,
WAIT_EVENT_RECOVERY_RETRIEVE_RETRY_INTERVAL
WAIT_EVENT_RECOVERY_RETRIEVE_RETRY_INTERVAL,
WAIT_EVENT_VACUUM_DELAY
} WaitEventTimeout;
/* ----------