Re: access time performance problem

From: "scott(dot)marlowe" <scott(dot)marlowe(at)ihs(dot)com>
To: Louis-Marie Croisez <louis-marie(dot)croisez(at)etca(dot)alcatel(dot)be>
Cc: <pgsql-general(at)postgresql(dot)org>
Subject: Re: access time performance problem
Date: 2002-10-10 15:34:01
Message-ID: Pine.LNX.4.33.0210100929590.30553-100000@css120.ihs.com
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On Thu, 10 Oct 2002, Louis-Marie Croisez wrote:

> Sorry, bad url:
> use this instead:
> http://louis.croisez.free.fr/capture1.jpg

I'm gonna make a guess here that it's WAL activity, or log activity.

So first off, are you saving postgresql's output to a log? if so, try
logging to a different drive than your data drive or turning off logging
for a quick test.

If it's WAL writes that are causing the problem, you can either try to
change the settings for commit_delay and commit_siblings or symlinking the
pg_xlog directory somewhere else. If you aren't sure how to do that,
don't learn how to on a live production server with real data.

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