| From: | "Jeffrey W(dot) Baker" <jwbaker(at)acm(dot)org> |
|---|---|
| To: | Ron Wills <ron(at)rwsoft(dot)ca> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Really bad diskio |
| Date: | 2005-07-15 21:17:34 |
| Message-ID: | 1121462254.29379.3.camel@toonses.gghcwest.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
On Fri, 2005-07-15 at 15:04 -0600, Ron Wills wrote:
> At Fri, 15 Jul 2005 13:45:07 -0700,
> Joshua D. Drake wrote:
> >
> > Ron Wills wrote:
> > > Hello all
> > >
> > > I'm running a postgres 7.4.5, on a dual 2.4Ghz Athlon, 1Gig RAM and
> > > an 3Ware SATA raid.
> >
> > 2 drives?
> > 4 drives?
> > 8 drives?
>
> 3 drives raid 5. I don't believe it's the raid. I've tested this by
> moving the database to the mirrors software raid where the root is
> found and onto the the SATA raid. Neither relieved the IO problems.
Hard or soft RAID? Which controller? Many of the 3Ware controllers
(85xx and 95xx) have extremely bad RAID 5 performance.
Did you take any pgbench or other benchmark figures before you started
using the DB?
-jwb
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