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Re: Performance problem on 8.2.4, but not 8.2.3

From: "Steinar H(dot) Gunderson" <sgunderson(at)bigfoot(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Performance problem on 8.2.4, but not 8.2.3
Date: 2007-05-25 20:05:23
Message-ID: 20070525200523.GA15547@uio.no (view raw or flat)
Thread:
Lists: pgsql-performance
On Fri, May 25, 2007 at 03:56:35PM -0400, Tom Lane wrote:
> I looked through the CVS logs and didn't find any planner changes
> between 8.2.3 and 8.2.4 that seem likely to affect your query, so
> I'm thinking it must be a statistical discrepancy.

It looks like the estimated cost is lower for 8.2.4 -- could it be that the
fact that he's giving it more memory lead to the planner picking a plan that
happens to be worse?

/* Steinar */
-- 
Homepage: http://www.sesse.net/

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Subject: Re: Performance problem on 8.2.4, but not 8.2.3
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