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SubjectRe: 2.4.23aa2 (bugfixes and important VM improvements for the high end)
Peter Zaitsev <peter@mysql.com> wrote:
>
> Sorry if I was unclear. These are suffexes from RH AS 3.0 kernel
> namings. "SMP" corresponds to normal SMP kernel they have, "hugemem"
> is kernel with 4G/4G split.
>
> >
> > > For CPU bound load (10 Warehouses) I got 7000TPM instead of 4500TPM,
> > > which is over 35% slowdown.
> >
> > Well no, it is a 56% speedup. Please clarify. Lots.
>
> Huh. The numbers shall be other way around of course :) "smp" kernel
> had better performance of some 7000TPM, compared to 4500TPM with
> HugeMem kernel.

That's a larger difference than I expected. But then, everyone has been
mysteriously quiet with the 4g/4g benchmarking.

A kernel profile would be interesting. As would an optimisation effort,
which, as far as I know, has never been undertaken.

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