| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org |
| Cc: | Dirk Lutzebäck <lutzeb(at)aeccom(dot)com>, Sven Geisler <sgeisler(at)aeccom(dot)com> |
| Subject: | Re: Performance problems on 4/8way Opteron (dualcore) HP DL585 |
| Date: | 2005-07-29 17:46:10 |
| Message-ID: | 200507291046.10318.josh@agliodbs.com |
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| Lists: | pgsql-performance |
Dirk,
> does anybody have expierence with this machine (4x 875 dual core Opteron
> CPUs)?
Nope. I suspect that you may be the first person to report in on
dual-cores. There may be special compile issues with dual-cores that
we've not yet encountered.
> We run RHEL 3.0, 32bit and under high load it is a drag. We
> mostly run memory demanding queries. Context switches are pretty much
> around 20.000 on the average, no cs spikes when we run many processes in
> parallel. Actually we only see two processes in running state! When
> there are only a few processes running context switches go much higher.
> At the moment we are much slower that with a 4way XEON box (DL580).
Um, that was a bit incoherent. Are you seeing a CS storm or aren't you?
--
--Josh
Josh Berkus
Aglio Database Solutions
San Francisco
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