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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Tim Jones <TJones@optio.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: strange query behavior
Date: Wed, 13 Dec 2006 17:36:49 -0500
Message-ID: <12548.1166049409@sss.pgh.pa.us> (raw)
In-Reply-To: <47668A1334CDBF46927C1A0DFEB223D39F7A98@mail.optiosoftware.com>
References: <47668A1334CDBF46927C1A0DFEB223D39F79A5@mail.optiosoftware.com>
	<10648.1166037392@sss.pgh.pa.us>
	<47668A1334CDBF46927C1A0DFEB223D39F79FA@mail.optiosoftware.com>
	<12115.1166047135@sss.pgh.pa.us>
	<47668A1334CDBF46927C1A0DFEB223D39F7A98@mail.optiosoftware.com>

"Tim Jones" <TJones@optio.com> writes:
>> Which PG version is this exactly?  Are you running with any nondefault
>> planner parameters?

> Version 8.1

8.1.what?

> Here are the planner constraints I believe we changed
> effective_cache_size and random_page_cost

Those look reasonably harmless.

My best bet at the moment is that you've got a pretty early 8.1.x
release and are hitting one of the planner bugs that we fixed earlier
this year.  Not enough info to say for sure though.

			regards, tom lane



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