From: Greg Smith <gsmith@gregsmith.com>
To: Adrian Moisey <adrian@careerjunction.co.za>
Cc: pgsql-performance@postgresql.org
Subject: Re: filesystems benchmark
Date: Mon, 15 Dec 2008 12:31:51 -0500 (EST)
Message-ID: <Pine.GSO.4.64.0812151218080.7153@westnet.com> (raw)
In-Reply-To: <4945FD58.8030604@careerjunction.co.za>
References: <4945FD58.8030604@careerjunction.co.za>
On Mon, 15 Dec 2008, Adrian Moisey wrote:
> I'm trying to compare different filesystems for postgres using pgbench. The
> problem I've seen is that my IO wait is very very low. Is there a way I can
> get pgbench to do more to push that up a little?
Increase the database scale until the wait is what you expect. See
http://www.westnet.com/~gsmith/gregsmith/content/postgresql/pgbench-scaling.htm
for details.
The latest filesystem performance comparison I'm aware of is at
http://www.baconandtech.com/files/filesystem_io.pdf
You might also take a look at that to make sure you're not re-mapping
territory that's already been explored.
--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD
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To: pgsql-performance@postgresql.org
Cc: gsmith@gregsmith.com, adrian@careerjunction.co.za
Subject: Re: filesystems benchmark
In-Reply-To: <Pine.GSO.4.64.0812151218080.7153@westnet.com>
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