From: tv@fuzzy.cz
To: Igor Neyman <ineyman@perceptron.com>
Cc: Patrick Donlin <pdonlin@oaisd.org>
Cc: Kevin Grittner <kevin.grittner@wicourts.gov>
Cc: pgsql-performance@postgresql.org
Subject: Re: Identical query slower on 8.4 vs 8.3
Date: Fri, 16 Jul 2010 16:17:24 +0200 (CEST)
Message-ID: <59630.62.40.76.70.1279289844.squirrel@sq.gransy.com> (raw)
In-Reply-To: <F4C27E77F7A33E4CA98C19A9DC6722A20640A45C@EXCHANGE.corp.perceptron.com >
References: <4C3EDB070200002500033621@gw.wicourts.gov>
<1123546138.13276371279206773000.JavaMail.root@mm-mailstore02.merit.edu>
<F4C27E77F7A33E4CA98C19A9DC6722A20640A45C@EXCHANGE.corp.perceptron.com>
> I'd suggest to increase the value up to ~80MB, if not for the system,
> may be just for the session running this query.
> Then see if performance improved.
Don't forget you can do this for the given query without affecting the
other queries - just do something like
SET work_mem = 128M
and then run the query - it should work fine. This is great for testing
and to set environment for special users (batch processes etc.).
regards
Tomas
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To: pgsql-performance@postgresql.org
Cc: tv@fuzzy.cz, ineyman@perceptron.com, pdonlin@oaisd.org, kevin.grittner@wicourts.gov
Subject: Re: Identical query slower on 8.4 vs 8.3
In-Reply-To: <59630.62.40.76.70.1279289844.squirrel@sq.gransy.com>
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