On Mon, 23 Jul 2007, Attilio Rao wrote:
2007/7/23, Jeremie Le Hen <[EMAIL PROTECTED]>:
Hi Jeff,
On Tue, Jul 03, 2007 at 02:27:51PM -0700, Jeff Roberson wrote:
> For the curious, these last two patches make a substantial improvement
to
> mysql write performance on my 8way opteron:
>
> http://people.freebsd.org/~jeff/mysqlwrite.png
>
> The green line is without and the blue line is with.
Just for information, do you have any hint why Linux eventually
performs better above 18 threads?
IIRC, this workload is lockmgr() dominated now, which is particulary
unlucky for us since they are very heavy.
Attilio should also mention that he is fixing this problem as his SoC
project. I expect to see good gains once this is complete.
Thanks,
Jeff
Attilio
--
Peace can only be achieved by understanding - A. Einstein
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