From: Jeffrey W. Baker <jwbaker@acm.org>
To: Ron Wills <ron@rwsoft.ca>
Cc: pgsql-performance@postgresql.org
Subject: Re: Really bad diskio
Date: Fri, 15 Jul 2005 14:17:34 -0700
Message-ID: <1121462254.29379.3.camel@toonses.gghcwest.com> (raw)
In-Reply-To: <874qavbx24.wl%ron@rwsoft.ca>
References: <8764vbby7r.wl%ron@rwsoft.ca>
<42D82053.1090309@commandprompt.com>
<874qavbx24.wl%ron@rwsoft.ca>
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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To: pgsql-performance@postgresql.org
Cc: jwbaker@acm.org, ron@rwsoft.ca
Subject: Re: Really bad diskio
In-Reply-To: <1121462254.29379.3.camel@toonses.gghcwest.com>
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