Date: Thu, 14 Jul 2005 13:29:48 -0500
From: "Jim C. Nasby" <decibel@decibel.org>
To: "Jeffrey W. Baker" <jwbaker@acm.org>
Cc: pgsql-performance@postgresql.org
Subject: Re: JFS fastest filesystem for PostgreSQL?
Message-ID: <20050714182948.GC92165@decibel.org>
References: <1121322821.6719.0.camel@noodles>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1121322821.6719.0.camel@noodles>
User-Agent: Mutt/1.5.9i

On Wed, Jul 13, 2005 at 11:33:41PM -0700, Jeffrey W. Baker wrote:
> [reposted due to delivery error -jwb]
> 
> I just took delivery of a new system, and used the opportunity to
> benchmark postgresql 8.0 performance on various filesystems.  The system
> in question runs Linux 2.6.12, has one CPU and 1GB of system memory, and
> 5 7200RPM SATA disks attached to an Areca hardware RAID controller
> having 128MB of cache.  The caches are all write-back.
> 
> I ran pgbench with a scale factor of 1000 and a total of 100,000
> transactions per run.  I varied the number of clients between 10 and
> 100.  It appears from my test JFS is much faster than both ext3 and XFS
> for this workload.  JFS and XFS were made with the mkfs defaults.  ext3
> was made with -T largefile4 and -E stride=32.  The deadline scheduler
> was used for all runs (anticipatory scheduler is much worse).
> 
> Here's the result, in transactions per second.
> 
>               ext3  jfs  xfs
> -----------------------------
>  10 Clients     55   81   68
> 100 Clients     61  100   64
> ----------------------------

BTW, it'd be interesting to see how UFS on FreeBSD compared.
-- 
Jim C. Nasby, Database Consultant               decibel@decibel.org 
Give your computer some brain candy! www.distributed.net Team #1828

Windows: "Where do you want to go today?"
Linux: "Where do you want to go tomorrow?"
FreeBSD: "Are you guys coming, or what?"