From: Gael Le Mignot <gael@pilotsystems.net>
To: pgsql-performance@postgresql.org
Subject: Memory usage of auto-vacuum
Date: Sat, 09 Jul 2011 09:25:32 +0200
Message-ID: <plop87tyavncer.fsf@aoskar.kilobug.org> (raw)
Hello,
We are running a PostgreSQL 8.4 database, with two tables containing a
lot (> 1 million) moderatly small rows. It contains some btree indexes,
and one of the two tables contains a gin full-text index.
We noticed that the autovacuum process tend to use a lot of memory,
bumping the postgres process near 1Gb while it's running.
I looked in the documentations, but I didn't find the information : do
you know how to estimate the memory required for the autovacuum if we
increase the number of rows ? Is it linear ? Logarithmic ?
Also, is there a way to reduce that memory usage ? Would running the
autovacuum more frequently lower its memory usage ?
Regards,
--
Gaël Le Mignot - gael@pilotsystems.net
Pilot Systems - 9, rue Desargues - 75011 Paris
Tel : +33 1 44 53 05 55 - www.pilotsystems.net
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To: pgsql-performance@postgresql.org
Cc: gael@pilotsystems.net
Subject: Re: Memory usage of auto-vacuum
In-Reply-To: <plop87tyavncer.fsf@aoskar.kilobug.org>
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