Re: Context switch storm

[Richard Huxton <dev(at)archonet(dot)com>]

Richard Troy wrote:
> On Fri, 3 Nov 2006, Richard Huxton wrote:
> > It's memory bandwidth issues on the older Xeons. If you search the
> > archives you'll see a lot of discussion of this. I'd have thought 8.1
> > would be better than 7.4 though.
>
> Hmmm... I just checked; one of our production systems is a multi-cpu Xeon
> based system of uncertain age (nobody remember 'zactly). While we haven't
> seen this problem yet, it's scheduled to take over demo-duty shortly and
> it would be an embarassment if we had this trouble during a demo... Is
> there any easy way to tell if you're at risk?

Try:
- multiple clients
- query doing sorts that fit into work_mem

--
  Richard Huxton
  Archonet Ltd