| From: | "Willis, Ian (Ento, Canberra)" <Ian(dot)Willis(at)ento(dot)csiro(dot)au> |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Subject: | RE: Re: Re: Fast Inserts and Hardware Questions |
| Date: | 2001-03-18 23:29:47 |
| Message-ID: | D21A20CD84607E409F314E31F0F68D8A0E6381@cricket-be.ento.csiro.au. |
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| Lists: | pgsql-general |
On linux the software raid will use the MMX instructions, can't these be
done in parrell to most other operations? Memory bandwidth may be the real
killer
--
Ian Willis
Systems Administrator
Division of Entomology CSIRO
GPO Box 1700
Canberra ACT 2601
ph 02 6246 4391
fax 02 6246 4000
-----Original Message-----
From: Steve Wolfe [mailto:steve(at)iboats(dot)com]
Sent: Saturday, 17 March 2001 10:48 AM
To: pgsql-general(at)postgresql(dot)org
Subject: Re: [GENERAL] Re: Re: Fast Inserts and Hardware Questions
> It's not surprising to see software raid outperforming hardware raid (both
> of modern vintage).
That's provided, of course, that you have a good amount of free CPU
cycles. On machines that are otherwise heavily CPU-loaded, software raid
has been (in my experience) horrible.
steve
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