Help with improving mysql performance on 6.2PRE

Kris Kennaway kris at
Thu Oct 12 13:53:43 PDT 2006

On Thu, Oct 12, 2006 at 11:25:48AM +0200, Oliver Fromme wrote:
> Jerry Bell wrote:
>  > I have a Dell PE2950 with 2 dual core 3.73Ghz processors and 4G of ram.
>  > [...]
>  > changed the clock to TSC
> As far as I know, it is unsafe to use TSC on SMP systems.
> Or did that change recently?

It's only on certain systems, apparently.

Note that you have to enable a second sysctl to allow it to actually
use TSC on SMP, not just change the preferred timecounter.

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