From: Steinar H. Gunderson <sgunderson@bigfoot.com>
To: Markus Schaber <schabi@logix-tt.com>
Cc: PostgreSQL Performance List <pgsql-performance@postgresql.org>
Subject: Re: PostgreSQL underestimates sorting
Date: Wed, 22 Nov 2006 14:54:34 +0100
Message-ID: <20061122135434.GA9669@uio.no> (raw)
In-Reply-To: <456423B3.7010505@logix-tt.com>
References: <456423B3.7010505@logix-tt.com>
On Wed, Nov 22, 2006 at 11:17:23AM +0100, Markus Schaber wrote:
> The Backend allocates gigs of memory (we've set sort_mem to 1 gig), and
> then starts spilling out more Gigs of temporary data to the disk.
How much RAM is in the server? Remember that sort_mem is _per sort_, so if
you have multiple sorts, it might allocate several multiples of the amount
you set up.
/* Steinar */
--
Homepage: http://www.sesse.net/
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To: pgsql-performance@postgresql.org
Cc: sgunderson@bigfoot.com, schabi@logix-tt.com
Subject: Re: PostgreSQL underestimates sorting
In-Reply-To: <20061122135434.GA9669@uio.no>
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