From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Ondřej Světlík <osvetlik@flexibee.eu>
Cc: pgsql-admin@postgresql.org
Subject: Re: Autovacuum of pg_database
Date: Tue, 10 May 2016 17:15:28 -0300
Message-ID: <20160510201528.GA664314@alvherre.pgsql> (raw)
In-Reply-To: <4352.1462833746@sss.pgh.pa.us>
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Tom Lane wrote:
> I'll bet they're all trying to do anti-wraparound vacuums. This would
> explain why the problem hasn't been observed often enough to have been
> fixed long since.
Ah, that should have been obvious, shouldn't it. I'm able to reproduce
the problem by moving relfrozenxid backwards for a shared catalog, and I
can confirm that it works correctly with the patch proposed, so I have
pushed it to all branches. (I only tested the problem scenario in 9.1
and master, since it's too much manual work).
Thanks for the report!
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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To: pgsql-admin@postgresql.org
Cc: alvherre@2ndquadrant.com, tgl@sss.pgh.pa.us, osvetlik@flexibee.eu
Subject: Re: Autovacuum of pg_database
In-Reply-To: <20160510201528.GA664314@alvherre.pgsql>
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