From: Tom Lane <tgl@sss.pgh.pa.us>
To: David Barton <dave@oneit.com.au>
Cc: pgsql-performance@postgresql.org
Subject: Re: Postgres 9.1.4 - high stats collector IO usage
Date: Sat, 28 Jul 2012 12:13:54 -0400
Message-ID: <29996.1343492034@sss.pgh.pa.us> (raw)
In-Reply-To: <50136B8D.7070502@oneit.com.au>
References: <50136B8D.7070502@oneit.com.au>
David Barton <dave@oneit.com.au> writes:
> I am running postgres 9.1.4 on Ubuntu 12.04 and the stats collector is
> generating very high IO usage even when nothing appears to be happening
> on the system.
> I have roughly 150 different databases, each of which is running in 1 of
> roughly 30 tablespaces. The databases are small (the dump of most is
> are under 100M, and all but 3 are under 1G, nothing larger than 2G).
That's a lot of databases. I think your problem probably stems from
autovacuum madly trying to cover all of them. Backing off (increasing)
autovacuum_naptime to slow its cycle might help.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, dave@oneit.com.au
Subject: Re: Postgres 9.1.4 - high stats collector IO usage
In-Reply-To: <29996.1343492034@sss.pgh.pa.us>
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