Re: Strange behavior: pgbench and new Linux kernels

From: Greg Smith <gsmith(at)gregsmith(dot)com>
To: Matthew <matthew(at)flymine(dot)org>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Strange behavior: pgbench and new Linux kernels
Date: 2008-04-18 17:19:09
Message-ID: Pine.GSO.4.64.0804181317480.6528@westnet.com
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On Fri, 18 Apr 2008, Matthew wrote:

> You may also be seeing processes forced to switch between CPUs, which
> breaks the caches even more. So what happens if you run pgbench on a
> separate machine to the server? Does the problem still exist in that
> case?

I haven't run that test yet but will before I submit a report. I did
however try running things with the pgbench executable itself bound to a
single CPU with no improvement.

--
* Greg Smith gsmith(at)gregsmith(dot)com http://www.gregsmith.com Baltimore, MD

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