From: Steve Wampler <swampler@noao.edu>
To: Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl>
Cc: Luke Lonergan <llonergan@greenplum.com>
Cc: Dave Cramer <pg@fastcrypt.com>
Cc: Pgsql-Performance <pgsql-performance@postgresql.org>
Subject: Re: Performance PG 8.0 on dual opteron / 4GB / 3ware
Date: Tue, 15 Nov 2005 12:41:23 -0700
Message-ID: <437A39E3.6030707@noao.edu> (raw)
In-Reply-To: <1132083116.3250.38.camel@Panoramix>
References: <BF9F6C0E.13B4A%llonergan@greenplum.com>
<1132083116.3250.38.camel@Panoramix>
Joost Kraaijeveld wrote:
> If I understand correctly (I have 4GB ram):
>
> jkr@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@noao.edu
The gods that smiled on your birth are now laughing out loud.
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To: pgsql-performance@postgresql.org
Cc: swampler@noao.edu, J.Kraaijeveld@Askesis.nl, llonergan@greenplum.com, pg@fastcrypt.com
Subject: Re: Performance PG 8.0 on dual opteron / 4GB / 3ware
In-Reply-To: <437A39E3.6030707@noao.edu>
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