Re: can't stop autovacuum by HUP'ing the server

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Dave Cramer <pg(at)fastcrypt(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: can't stop autovacuum by HUP'ing the server
Date: 2008-08-26 15:41:09
Message-ID: 20080826154109.GE4920@alvh.no-ip.org
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Dave Cramer wrote:
> On Tue, Aug 26, 2008 at 10:56 AM, Alvaro Herrera <alvherre(at)commandprompt(dot)com

> > The only possible explanation for this behavior is that somebody is
> > signalling the postmaster due to Xid wraparound issues. This is keyed
> > on some GUC vars -- Perhaps you have autovacuum_freeze_max_age set to an
> > insane value?
>
> Doesn't appear to be insane ?
>
> #autovacuum_freeze_max_age = 200000000 # maximum XID age before forced
> vacuum

Not only sane, but also the default ;-)

What's the max age(pg_database.datfrozenxid)?

--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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