Re: Performance on new 64bit server compared to my 32bit desktop

From: Greg Smith <greg(at)2ndquadrant(dot)com>
To: Philippe Rimbault <primbault(at)edd(dot)fr>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Performance on new 64bit server compared to my 32bit desktop
Date: 2010-08-19 18:31:39
Message-ID: 4C6D788B.2090308@2ndquadrant.com
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Greg Smith wrote:
> Since your smaller system has 2GB of RAM and the larger one 32GB, try
> this instead:
>
> pgbench -i -s 2000
> pgbench -c 24 -T 60 -S
> pgbench -c 24 -T 300

Oh, and to at least give a somewhat more normal postgresql.conf I'd
recommend you at least make the following two changes before doing the
above:

shared_buffers=256MB
checkpoint_segments=32

Those are the two parameters the pgbench test is most sensitive to, so
setting to higher values will give more realistic results.

--
Greg Smith 2ndQuadrant US Baltimore, MD
PostgreSQL Training, Services and Support
greg(at)2ndQuadrant(dot)com www.2ndQuadrant.us

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