From: Heikki Linnakangas <heikki@enterprisedb.com>
To: Dan Harris <fbsd@drivefaster.net>
Cc: PostgreSQL Performance <pgsql-performance@postgresql.org>
Subject: Re: quad or dual core Intel CPUs
Date: Tue, 13 Feb 2007 22:52:54 +0000
Message-ID: <45D24146.3050402@enterprisedb.com> (raw)
In-Reply-To: <45D239D3.5020501@drivefaster.net>
References: <20070213194610.GA10789@juniper.net>
<45D22829.8050503@tweakers.net>
<45D239D3.5020501@drivefaster.net>
Dan Harris wrote:
> Arjen van der Meijden wrote:
>
>> But be aware that there can be substantial and unexpected differences
>> on this relatively new platform due to simply changing the OS, like we
>> saw when going from linux 2.6.15 to 2.6.18, as you can see here:
>> http://tweakers.net/reviews/657/2
>
> Having upgraded to 2.6.18 fairly recently, I am *very* interested in
> what caused the throughput to drop in 2.6.18? I haven't done any
> benchmarking on my system to know if it affected my usage pattern
> negatively, but I am curious if anyone knows why this happened?
I think you're reading the results backwards. PostgreSQL throughput
increased, not decreased, by the upgrade.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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To: pgsql-performance@postgresql.org
Cc: heikki@enterprisedb.com, fbsd@drivefaster.net
Subject: Re: quad or dual core Intel CPUs
In-Reply-To: <45D24146.3050402@enterprisedb.com>
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