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Add wait events for recovery conflicts.

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This commit introduces new wait events RecoveryConflictSnapshot and
RecoveryConflictTablespace. The former is reported while waiting for
recovery conflict resolution on a vacuum cleanup. The latter is reported
while waiting for recovery conflict resolution on dropping tablespace.

Also this commit changes the code so that the wait event Lock is reported
while waiting in ResolveRecoveryConflictWithVirtualXIDs() for recovery
conflict resolution on a lock. Basically the wait event Lock is reported
during that wait, but previously was not reported only when that wait
happened in ResolveRecoveryConflictWithVirtualXIDs().

Author: Masahiko Sawada
Reviewed-by: Fujii Masao
Discussion: https://postgr.es/m/CA+fd4k4mXWTwfQLS3RPwGr4xnfAEs1ysFfgYHvmmoUgv6Zxvmg@mail.gmail.com
This commit is contained in:
Fujii Masao
2020-04-03 12:15:56 +09:00
parent 9d8ef98800
commit 18808f8c89
4 changed files with 29 additions and 5 deletions
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10
doc/src/sgml/monitoring.sgml
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@@ -1346,7 +1346,7 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
<entry>Waiting in an extension.</entry>
</row>
<row>
<entry morerows="38"><literal>IPC</literal></entry>
<entry morerows="40"><literal>IPC</literal></entry>
<entry><literal>BackupWaitWalArchive</literal></entry>
<entry>Waiting for WAL files required for the backup to be successfully archived.</entry>
</row>
@@ -1482,6 +1482,14 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
<entry><literal>Promote</literal></entry>
<entry>Waiting for standby promotion.</entry>
</row>
<row>
<entry><literal>RecoveryConflictSnapshot</literal></entry>
<entry>Waiting for recovery conflict resolution on a vacuum cleanup.</entry>
</row>
<row>
<entry><literal>RecoveryConflictTablespace</literal></entry>
<entry>Waiting for recovery conflict resolution on dropping tablespace.</entry>
</row>
<row>
<entry><literal>RecoveryPause</literal></entry>
<entry>Waiting for recovery to be resumed.</entry>