From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Gregory Stark <stark(at)enterprisedb(dot)com>, pgsql-patches(at)postgresql(dot)org |
Subject: | Re: Autovacuum cancellation |
Date: | 2007-10-26 01:11:02 |
Message-ID: | 20071026011102.GO23566@alvh.no-ip.org |
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Lists: | pgsql-committers pgsql-hackers pgsql-patches |
Tom Lane wrote:
> Gregory Stark <stark(at)enterprisedb(dot)com> writes:
> > I think there's a window where the process waiting directly on
> > autovacuum could have already fired its deadlock check before it was
> > waiting directly on autovacuum.
>
> I think you don't understand what that code is doing. If there's an
> autovac anywhere in the dependency graph, it'll find it.
Thanks for making that explicit, I was trying to build a test case where
it would lock :-)
(If we had concurrent psql we could even have it in the regression tests
...)
--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.
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