From: Stephen Frost <sfrost@snowman.net>
To: Dan Harris <fbsd@drivefaster.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: Quad Opteron stuck in the mud
Date: Wed, 13 Jul 2005 16:17:15 -0400
Message-ID: <20050713201715.GI24207@ns.snowman.net> (raw)
In-Reply-To: <862C6AD9-646B-4907-AB18-09F1AD08B5F5@drivefaster.net>
References: <E5E21B7B-FFE0-4D24-8CDD-62179AEBBB92@drivefaster.net>
<42D56772.6020408@arbash-meinel.com>
<862C6AD9-646B-4907-AB18-09F1AD08B5F5@drivefaster.net>
* Dan Harris (fbsd@drivefaster.net) wrote:
> On Jul 13, 2005, at 1:11 PM, John A Meinel wrote:
> >I might be wrong, but there may be something much more substantially
> >wrong than slow i/o.
>
> Yes, I'm afraid of that too. I just don't know what tools I should
> use to figure that out. I have some 20 other databases on this
> system, same schema but varying sizes, and the small ones perform
> very well. It feels like there is an O(n) increase in wait time that
> has recently become very noticeable on the largest of them.
Could you come up w/ a test case that others could reproduce where
explain isn't returning? I think that would be very useful towards
solving at least that issue...
Thanks,
Stephen
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To: pgsql-performance@postgresql.org
Cc: sfrost@snowman.net, fbsd@drivefaster.net
Subject: Re: Quad Opteron stuck in the mud
In-Reply-To: <20050713201715.GI24207@ns.snowman.net>
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