| From: | Neil Conway <neilc(at)samurai(dot)com> |
|---|---|
| To: | Greg Stark <gsstark(at)mit(dot)edu> |
| Cc: | Bill Moran <wmoran(at)potentialtech(dot)com>, PostgreSQL Performance <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Pg+Linux swap use |
| Date: | 2003-10-31 18:45:48 |
| Message-ID: | 1067625948.447.4.camel@tokyo |
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| Thread: | |
| Lists: | pgsql-performance |
On Fri, 2003-10-31 at 11:37, Greg Stark wrote:
> My understanding is that the case where HT hurts is precisely your case. When
> you have two real processors with HT the kernel will sometimes schedule two
> jobs on the two virtual processors on the same real processor leaving the two
> virtual processors on the other real processor idle.
If you're seeing this behavior, it's sounds like a bug/deficiency in
your kernel's scheduler: if it is HT-aware, it should go to some lengths
to avoid this kind of processor allocation.
-Neil
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