| From: | Heikki Linnakangas <heikki(at)enterprisedb(dot)com> |
|---|---|
| To: | Dan Harris <fbsd(at)drivefaster(dot)net> |
| Cc: | PostgreSQL Performance <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: quad or dual core Intel CPUs |
| Date: | 2007-02-13 22:52:54 |
| Message-ID: | 45D24146.3050402@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-performance |
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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