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Force VACUUM to recalculate oldestXmin even when we haven't changed our

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own database's datfrozenxid, if the current value is old enough to be
forcing autovacuums or warning messages.  This ensures that a bogus
value is replaced as soon as possible.  Per a comment from Heikki.
This commit is contained in:
Tom Lane
2009-09-01 04:46:49 +00:00
parent 14f445fccf
commit 794e3e81a0
3 changed files with 22 additions and 12 deletions
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7
src/backend/commands/vacuum.c
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@@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.392 2009/09/01 02:54:51 alvherre Exp $
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.393 2009/09/01 04:46:49 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -893,9 +893,10 @@ vac_update_datfrozenxid(void)
/*
* If we were able to advance datfrozenxid, see if we can truncate pg_clog.
* Also do it if the shared XID-wrap-limit info is stale.
* Also do it if the shared XID-wrap-limit info is stale, since this
* action will update that too.
*/
if (dirty || !TransactionIdLimitIsValid())
if (dirty || ForceTransactionIdLimitUpdate())
vac_truncate_clog(newFrozenXid);
}