From: Tom Lane <tgl@sss.pgh.pa.us>
To: Brian Wong <bwong@imageworks.com>
cc: "pgsql-admin@postgresql.org" <pgsql-admin@postgresql.org>
Subject: Re: Getting "Out of memory" errors on server 9.1.9
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Comments: In-reply-to Brian Wong <bwong@imageworks.com>
 message dated "Thu, 22 Aug 2013 15:53:57 -0700"
Date: Thu, 22 Aug 2013 19:16:55 -0400
Message-ID: <27357.1377213415@sss.pgh.pa.us>
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Brian Wong <bwong@imageworks.com> writes:
> I'm getting a "Out of memory" error on a 9.1.9 server.  What do these lines
> in the log mean?  ~ Brian

It's a memory usage map.  Your problem is evidently here:

>   MessageContext: 3046113280 total in 374 blocks; 24584 free (5 chunks);
> 3046088696 used

As far as I recall at the moment, MessageContext is used to parse,
analyze, and possibly to plan an incoming query.  So the short answer is
that you're trying to run a query that's too long and/or too complicated.
We'd need a lot more details before suggesting how you might work around
that.

			regards, tom lane


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