From: Joshua D. Drake <jd@commandprompt.com>
To: mischa@ca.sophos.com
Cc: pgsql-performance@postgresql.org
Subject: Re: Solaris shared_buffers anomaly?
Date: Tue, 13 Jun 2006 15:55:32 -0700
Message-ID: <448F4264.5030109@commandprompt.com> (raw)
In-Reply-To: <448F3A6E.6080908@ca.sophos.com>
References: <1150151282.14661.42.camel@tigger>
<20060613000441.GI8588@kenobi.snowman.net>
<20060613200810.GZ34196@pervasive.com>
<448F3A6E.6080908@ca.sophos.com>
> Initially shared_buffers were set to 1000 (8MB).
> Then, we moved all apps but the database server off the box.
>
> Raised shared_buffers to 2000 (16MB).
> Modest improvement in some frequent repeated queries.
>
> Raised shared_buffers to 16000 (128MB).
> DB server dropped to a CRAWL.
Versions below 8.1 normally don't do well with high shared_buffers. 8.1
would do much better. If you dropped that to more like 6k you would
probably continue to see increase over 2k.
Sincerely,
Joshua D. Drake
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To: pgsql-performance@postgresql.org
Cc: jd@commandprompt.com, mischa@ca.sophos.com
Subject: Re: Solaris shared_buffers anomaly?
In-Reply-To: <448F4264.5030109@commandprompt.com>
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