Re: Performance PG 8.0 on dual opteron / 4GB / 3ware

From: Steve Wampler <swampler(at)noao(dot)edu>
To: Joost Kraaijeveld <J(dot)Kraaijeveld(at)Askesis(dot)nl>
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 19:41:23
Message-ID: 437A39E3.6030707@noao.edu
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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.

--
Steve Wampler -- swampler(at)noao(dot)edu
The gods that smiled on your birth are now laughing out loud.

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