From: Stephen Frost <sfrost@snowman.net>
To: Ed Tyrrill <tyrrill_ed@emc.com>
Cc: pgsql-performance@postgresql.org
Subject: Re:
Date: Mon, 25 Jun 2007 19:52:09 -0400
Message-ID: <20070625235209.GG7531@tamriel.snowman.net> (raw)
In-Reply-To: <1182814742.6477.5.camel@nickel.avamar.com>
References: <A23190A408F7094FAF446C1538222F76041E1C28@avaexch01.avamar.com>
<20070625215654.GF7531@tamriel.snowman.net>
<1182814742.6477.5.camel@nickel.avamar.com>
* Ed Tyrrill (tyrrill_ed@emc.com) wrote:
> Yes, work_mem was set to 128MB for all runs. All settings were the same
> except for the change to default_statistics_target. I'm certainly
> memory constrained, but giving 2GB to one one session doesn't allow
> other sessions to do anything. Possibly when we upgrade to 16GB. :-)
You might consider a smaller increase, say to 256MB, to see if that'll
switch it to a hash join (and then watch the *actual* memory usage, of
course), if you're looking for performance for this query at least.
Yeah, 2GB is what I typically run on our data warehouse box, which is a
nice dual-proc/dual-core DL385 w/ 16GB of ram. :) The annoying thing is
that I can still run it out of memory sometimes, even w/ 16GB. :/
Thanks,
Stephen
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To: pgsql-performance@postgresql.org
Cc: sfrost@snowman.net, tyrrill_ed@emc.com
Subject: Re:
In-Reply-To: <20070625235209.GG7531@tamriel.snowman.net>
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