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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Steve <cheetah@tanabi.org>
Cc: Scott Marlowe <smarlowe@g2switchworks.com>
Cc: PostgreSQL Performance <pgsql-performance@postgresql.org>
Subject: Re: Strangely Variable Query Performance
Date: Thu, 12 Apr 2007 23:49:54 -0400
Message-ID: <12360.1176436194@sss.pgh.pa.us> (raw)
In-Reply-To: <Pine.GSO.4.64.0704122025450.17955@kittyhawk.tanabi.org>
References: <57271CC2-BCB1-4ACA-A177-4FF64F1BC33F@brandeis.edu>
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	<Pine.LNX.4.64.0704121000570.32187@glacier.frostconsultingllc.com>
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	<Pine.GSO.4.64.0704122025450.17955@kittyhawk.tanabi.org>

Steve <cheetah@tanabi.org> writes:
> Just dropping that index had no effect, but there's a LOT of indexes that 
> refer to receipt.  So on a hunch I tried dropping all indexes that refer 
> to receipt date and that worked -- so it's the indexes that contain 
> receipt date that are teh problem.

I'm still not having any luck reproducing the failure here.  Grasping at
straws again, I wonder if it's got something to do with the order in
which the planner examines the indexes --- which is OID order.  Could
you send me the results of 

select indexrelid::regclass from pg_index where indrelid = 'detail_summary'::regclass order by indexrelid;

			regards, tom lane



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  Subject: Re: Strangely Variable Query Performance
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