From: Joshua D. Drake <jd@commandprompt.com>
To: Josh Berkus <josh@agliodbs.com>
Cc: pgsql-performance@postgresql.org, Bruce Momjian <bruce@momjian.us>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Alvaro Herrera <alvherre@commandprompt.com>
Cc: Alexander Staubo <alex@purefiction.net>
Cc: Michael Stone <mstone+postgres@mathom.us>
Subject: Re: New to PostgreSQL, performance considerations
Date: Wed, 13 Dec 2006 19:02:39 -0800
Message-ID: <1166065359.6494.16.camel@localhost.localdomain> (raw)
In-Reply-To: <200612131836.25713.josh@agliodbs.com>
References: <200612140104.kBE14Dx09695@momjian.us>
<200612131836.25713.josh@agliodbs.com>
On Wed, 2006-12-13 at 18:36 -0800, Josh Berkus wrote:
> Bruce,
>
> > pgbench is designed to be a general benchmark, meanining it exercises
> > all parts of the system. I am thinking just reexecuting a single SELECT
> > over and over again would be a better test of the CPU optimizations.
>
> Mostly, though, pgbench just gives the I/O system a workout. It's not a
> really good general workload.
It also will not utilize all cpus on a many cpu machine. We recently
found that the only way to *really* test with pgbench was to actually
run 4+ copies of pgbench at the same time.
J
>
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To: pgsql-performance@postgresql.org
Cc: jd@commandprompt.com, josh@agliodbs.com, bruce@momjian.us, tgl@sss.pgh.pa.us, alvherre@commandprompt.com, alex@purefiction.net, mstone+postgres@mathom.us
Subject: Re: New to PostgreSQL, performance considerations
In-Reply-To: <1166065359.6494.16.camel@localhost.localdomain>
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