| From: | Shane Ambler <pgsql(at)Sheeky(dot)Biz> |
|---|---|
| To: | Bart Grantham <bg(at)logicworks(dot)net> |
| Cc: | "'pgsql-general(at)postgresql(dot)org'" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Opteron vs. Xeon performance differences |
| Date: | 2008-10-10 17:50:26 |
| Message-ID: | 48EF95E2.9070105@Sheeky.Biz |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
Bart Grantham wrote:
> a long story short: we're experiencing Xeons as 50% slower than
> Opterons, even when the Xeon has twice as much cache and a slight
> clock speed advantage.
> tests I finally took the final leap: just pull the disks and throw
> them in a newer Opteron chassis (2.8GHz, 1M cache). And whaddya
> know? It's got a 20% speed edge on the older Opteron, and blows away
> the performance of the newer Xeons.
But is the difference in cpu or disk?
Do the two machines get a similar disk transfer rate?
Same raid card and disks in both machines, do they get the same MB/Sec?
(as opposed to on-board controllers)
--
Shane Ambler
pgSQL (at) Sheeky (dot) Biz
Get Sheeky @ http://Sheeky.Biz
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