From: Laszlo Nagy <gandalf@designaproduct.biz>
To: pgsql-performance@postgresql.org
Subject: Re: Poor performance on seq scan
Date: Tue, 12 Sep 2006 23:49:21 +0200
Message-ID: <45072B61.3080506@designaproduct.biz> (raw)
In-Reply-To: <45072130.6020508@modgraph-usa.com>
References: <450684EC.4090304@designaproduct.biz>
<17034.1158079926@sss.pgh.pa.us>
<45072130.6020508@modgraph-usa.com>
Craig A. James wrote:
>
> There IS a bug for SATA disk drives in some versions of the Linux
> kernel. On a lark I ran some of the I/O tests in this thread, and
> much to my surprise discovered my write speed was 6 MB/sec ... ouch!
> On an identical machine, different kernel, the write speed was 54 MB/sec.
My disks are running in SATA150 mode. Whatever it means.
I'm using FreeBSD, and not just because it dynamically alters the
priority of long running processes. :-)
Laszlo
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To: pgsql-performance@postgresql.org
Cc: gandalf@designaproduct.biz
Subject: Re: Poor performance on seq scan
In-Reply-To: <45072B61.3080506@designaproduct.biz>
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