Date: Tue, 18 Mar 2003 10:45:40 -0500 (EST) From: Daniel Ellard <ellard@eecs.harvard.edu> To: John <jwd@bsdwins.com> Cc: Hackers List <freebsd-hackers@freebsd.org>, dwmalone@maths.tcd.ie Subject: Re: NFS performance tuning Message-ID: <Pine.BSF.4.51.0303181032010.45566@bowser.eecs.harvard.edu> In-Reply-To: <20030318020201.GA2329@BSDWins.Com> References: <20030318020201.GA2329@BSDWins.Com>
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The tweaks I've been working on are for read performance. Based on what you sent, I don't think read performance is your problem at all (although they might help you anyway, in the long run). So, my advice might be no more useful than line noise, but here goes: 1. You've got a nfsd taking 48% of an athlon 2200? Wow. If you can profile it to get a look at where it's spending the time, that would be incredibly interesting. I've never seen an nfsd do that. 2. You've got 5 network interfaces, and 2 of them are gigabit, but you're only running 8 nfsds. By rule of thumb, I would add more. This doesn't solve your mystery, however, because it's the master that's eating all the CPU. (Why do the gigabit interfaces see an order of magnitude less traffic than the 100Mb/s?) 3. Are you using TCP or UDP? Any kind of flow control on the switch? I'm interested to hear what other people have to say. -Dan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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