From: "Tom Lane" <t...@sss.pgh.pa.us>
problem, the user might not realize he's got one until he starts to wonder
why autovac/autoanalyze aren't working.


In autovacuum.c, autovacuum workers avoid waiting for the standby by doing:

/*
 * Force synchronous replication off to allow regular maintenance even if
 * we are waiting for standbys to connect. This is important to ensure we
 * aren't blocked from performing anti-wraparound tasks.
 */
if (synchronous_commit > SYNCHRONOUS_COMMIT_LOCAL_FLUSH)
 SetConfigOption("synchronous_commit", "local",
     PGC_SUSET, PGC_S_OVERRIDE);

Regards
MauMau



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