Re: XFS filessystem for Datawarehousing

Hi Luke,
That is ~ 50% increase !! Amazing...
How many reader processes did you have to get this results ?

Regards. Milen

-----Original Message-----
From: pgsql-performance-owner(at)postgresql(dot)org [mailto:pgsql-performance-owner(at)postgresql(dot)org] On Behalf Of Luke Lonergan
Sent: Thursday, August 03, 2006 6:05 AM
To: Michael Stone; pgsql-performance(at)postgresql(dot)org
Subject: Re: [PERFORM] XFS filessystem for Datawarehousing

Again - the performance difference increases as the disk speed increases.

Our experience is that we went from 300MB/s to 475MB/s when moving from ext3 to xfs.

- Luke

On 8/2/06 4:33 PM, "Michael Stone" <mstone+postgres(at)mathom(dot)us> wrote:

> On Wed, Aug 02, 2006 at 02:26:39PM -0700, Steve Poe wrote:
>> For the past year, I have been running odbc-bench on a dual-opteron
>> with 4GB of RAM using a 8GB sample data. I found the performance
>> difference between EXT3, JFS, and XFS is +/- 5-8%.
>
> That's not surprising when your db is only 2x your RAM. You'll find
> that filesystem performance is much more important when your database
> is 10x+ your RAM (which is often the case once your database heads
> toward a TB).
>
>> Testing newer kernels and read-ahead patches may benefit you as well.
>
> I've been really impressed by the adaptive readahead patches with
> postgres.
>
> Mike Stone
>
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