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?
Date: Thu, 14 Jul 2005 13:29:48 -0500
Message-ID: <20050714182948.GC92165@decibel.org> (raw)
In-Reply-To: <1121322821.6719.0.camel@noodles>
References: <1121322821.6719.0.camel@noodles>
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
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To: pgsql-performance@postgresql.org
Cc: decibel@decibel.org, jwbaker@acm.org
Subject: Re: JFS fastest filesystem for PostgreSQL?
In-Reply-To: <20050714182948.GC92165@decibel.org>
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