Date: Thu, 15 Mar 2007 23:13:03 +0100 From: Axel Rau <Axel.Rau@Chaos1.DE> To: freebsd-amd64@freebsd.org, freebsd-database@freebsd.org Subject: New Opteron box, dedicated to PostgreSQL Message-ID: <8CDBEAF9-0945-4CD2-89C4-58AA63850ECC@Chaos1.DE>
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Hi,
while configuring my 1st PostgreSQL box with dual Opterons (2212) on =20
FreeBSD, I have some questions:
1. Are there any precautions in fbsd to prevent from excessive page =20
switching between the memory nodes?
E.g. what happens if file cache pages (heavily used by Pg, =20
planned 6GB) frequently not found on local node?
2. If there is no good solution for this problem, does it make sense =20
to stay with one dualcore (soon quadcore) processor?
3. What are the recommendations for tuning I/O)?
- setting sysctl vfs.read_max to 16 or 32
- rebuilding the relevant filesystem with 32K blocks and 4K frags
Are these reliable?
4. Can I install the system on an Areca raid?
Thanks, Axel
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Axel Rau, =E2=98=80Frankfurt , Germany +49 69 9514 =
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