| From: | Joost Kraaijeveld <J(dot)Kraaijeveld(at)Askesis(dot)nl> |
|---|---|
| To: | Steve Wampler <swampler(at)noao(dot)edu> |
| Cc: | Luke Lonergan <llonergan(at)greenplum(dot)com>, Dave Cramer <pg(at)fastcrypt(dot)com>, Pgsql-Performance <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Performance PG 8.0 on dual opteron / 4GB / 3ware |
| Date: | 2005-11-15 19:51:27 |
| Message-ID: | 1132084287.3250.41.camel@Panoramix |
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| Thread: | |
| Lists: | pgsql-performance |
On Tue, 2005-11-15 at 12:41 -0700, Steve Wampler wrote:
> Joost Kraaijeveld wrote:
> > If I understand correctly (I have 4GB ram):
> >
> > jkr(at)Panoramix:~/tmp$ dd if=/dev/zero of=bigfile bs=8k count=1000000
> > 1000000+0 records in
> > 1000000+0 records out
> > 8192000000 bytes transferred in 304.085269 seconds (26939812 bytes/sec)
> >
> > Which looks suspicious: 26308 MB/sec???
>
> Eh? That looks more like ~25.7 MB/sec, assuming 1MB = 1024*1024 bytes.
Oooops. This calculation error is not typical for my testing (I think ;-)).
--
Groeten,
Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: 024-3888063 / 06-51855277
fax: 024-3608416
e-mail: J(dot)Kraaijeveld(at)Askesis(dot)nl
web: www.askesis.nl
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