| From: | "Luke Lonergan" <llonergan(at)greenplum(dot)com> |
|---|---|
| To: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
| Cc: | "Miguel" <mmiranda(at)123(dot)com(dot)sv>, "Postgresql Performance" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Best OS & Configuration for Dual Xeon w/4GB & |
| Date: | 2006-03-21 15:25:07 |
| Message-ID: | C0455AD3.1FA81%llonergan@greenplum.com |
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| Thread: | |
| Lists: | pgsql-performance |
Jim,
On 3/21/06 3:49 AM, "Jim C. Nasby" <jnasby(at)pervasive(dot)com> wrote:
> No, I don't know why the transfer rates for the mirror are 1/2 that as the raw
> device. :(
Well - lessee. Would those drives be attached to a Silicon Image (SII) SATA
controller? A Highpoint?
I found in testing about 2 years ago that under Linux (looks like you're
BSD), most SATA controllers other than the Intel PIIX are horribly broken
from a performance standpoint, probably due to bad drivers but I'm not sure.
Now I think whatever is commonly used by Nforce 4 implementations seems to
work ok, but we don't count on them for RAID configurations yet.
- Luke
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