From: PFC <lists@peufeu.com>
To: Markus Schiltknecht <markus@bluegap.ch>
To: Heikki Linnakangas <heikki@enterprisedb.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: dbt2 NOTPM numbers
Date: Mon, 04 Jun 2007 18:47:20 +0200
Message-ID: <op.tteow6v7cigqcu@apollo13> (raw)
In-Reply-To: <46642F2E.3080509@bluegap.ch>
References: <466428F7.5010808@bluegap.ch>
<46642B33.6030101@enterprisedb.com>
<46642F2E.3080509@bluegap.ch>
> I'll run a bonnie++ first. As the CPUs seem to be idle most of the time
> (see the vmstat.out below), I'm suspecting the RAID or disks.
You have a huge amount of iowait !
Did you put the xlog on a separate disk ?
What filesystem do you use ?
Did you check that your BBU cache works ?
For that run a dumb script which does INSERTS in a test table in
autocommit mode ; if you get (7200rpm / 60) = 120 inserts / sec or less,
the good news is that your drives don't lie about fsync, the bad news is
that your BBU cache isn't working...
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To: pgsql-performance@postgresql.org
Cc: lists@peufeu.com, markus@bluegap.ch, heikki@enterprisedb.com
Subject: Re: dbt2 NOTPM numbers
In-Reply-To: <op.tteow6v7cigqcu@apollo13>
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