On Mon, 11 Apr 2011 13:09:15 -0500, "Kevin Grittner"
<[email protected]> wrote:
> Glyn Astill <[email protected]> wrote:
>
>> The new server uses 4 x 8 core Xeon X7550 CPUs at 2Ghz
>
> Which has hyperthreading.
>
>> our current servers are 2 x 4 core Xeon E5320 CPUs at 2Ghz.
>
> Which doesn't have hyperthreading.
>
> PostgreSQL often performs worse with hyperthreading than without.
> Have you turned HT off on your new machine? If not, I would start
> there.
And then make sure you aren't running CFQ.
JD
>
> -Kevin
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