[GRLUG] FYI - old mysql and new gear

[Michael Mol]

On Thu, Sep 22, 2011 at 2:29 PM, Mike Williams <knightperson at zuzax.com> wrote:
> On 9/22/2011 2:20 PM, scott.tanner at comcast.net wrote:
>
> I'm very familiar with nice, but its the taskset command I was referring to,
> which takes affect at the scheduler:
>
> http://www.cyberciti.biz/tips/setting-processor-affinity-certain-task-or-process.html
>
>
> Regards,
> Scott
>
> That's good stuff to know for the day when I get to play with a box that has
> more than2 actual cores. Regarding turning off hyperthreading, I assume it's
> known which pairs of CPU's are actually the same core? Maybe you could see
> if there's any performance difference running it on 1, 3, 5, and 7 versus 1,
> 2, 3, and 4 (assuming that 1 and 2 are core the first core, 2 and 3 are the
> second, etc).

It's worth noting that the kernel does have support for HT-awareness.
I don't know whether Scott's kernel has that configuration option
enabled, though.


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