Date: Fri, 16 Mar 2007 09:40:42 -0500 From: Harrison Grundy <astrodog@gmail.com> Cc: 'Axel Rau' <Axel.Rau@Chaos1.DE>, freebsd-database@freebsd.org, freebsd-amd64@freebsd.org Subject: Re: New Opteron box, dedicated to PostgreSQL Message-ID: <45FAAC6A.90209@gmail.com> In-Reply-To: <000801c76757$4a6cf9e0$0204a8c0@jmlaptop> References: <000801c76757$4a6cf9e0$0204a8c0@jmlaptop>
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Jan Mikkelsen wrote: > Hi, > > Axel Rau wrote: > > >> 1. Are there any precautions in fbsd to prevent from excessive page >> switching between the memory nodes? >> E.g. what happens if file cache pages (heavily used by Pg, >> planned 6GB) frequently not found on local node? >> > > Not that I'm aware of. FreeBSD doesn't have NUMA awareness. > FreeBSD does not support this. I've been working on the scheduler side of things, but I do not understand the VM well enough to do that side of it. > >> 2. If there is no good solution for this problem, does it make sense >> to stay with one dualcore (soon quadcore) processor? >> No. 2 memory controllers beats 1, even with the remote penalty occuring. The difference either way will be fairly trivial, though. > > Benchmark and see. > > >> 4. Can I install the system on an Areca raid? >> > > Yes. If you are planning to use 6.2-RELEASE, make sure that you get the > arcmsr driver from 6-STABLE. The arcmsr driver in 6.2-RELEASE can show > I/O errors under high load. > > Regards, > > Jan Mikkelsen > > _______________________________________________ > freebsd-amd64@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-amd64 > To unsubscribe, send any mail to "freebsd-amd64-unsubscribe@freebsd.org" > >
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