Date: Sun, 29 Aug 2004 17:18:45 -0700 (PDT) From: Doug White <dwhite@gumbysoft.com> To: Bob Willcox <bob@immure.com> Cc: Claus Guttesen <cguttesen@yahoo.dk> Subject: Re: nfsd slows with age Message-ID: <20040829171652.X69068@carver.gumbysoft.com> In-Reply-To: <20040827211347.GD183@luke.immure.com> References: <20040827183518.GB183@luke.immure.com> <20040827211347.GD183@luke.immure.com>
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On Fri, 27 Aug 2004, Bob Willcox wrote: > On Fri, Aug 27, 2004 at 11:00:14PM +0200, Claus Guttesen wrote: > > > I have noticed that on my NFS file server system the > > > nfsd process > > > gradually starts using more and more CPU time ... > > > Stopping and restarting nfsd seems to fix things > > back to > > > normal. > > > > > > Has anyone else seen this behavior? > > > > I'm running a nfs-server with current as of Feb. 18'th > > 2004, serving approx. 5 TB for some web-servers. It's > > also acting as a rsync- and syslog-server. The > > cpu-usage hardly goes above 10 % while doing nfs, > > except when doing internal copying or rsyncing. > > Longest uptime was 118 days before I took it down to > > add more disks. Works _very_ solid (knock-knock) I > > must say. > > > > Are you using tcp or udp? > > I'm using udp. My (rather few) clients use amd to automount stuff (home > dirs, etc.). > > The server system it'self is really lightly loaded as it's for my > home network with usually only me accessing it (via nfs to my home > directory from my workstation). I don't know if the slowdown is related > to activity or not, guess I could run some tests to try to determine > this. I'd keep an eye on automounter and rpc.statd. Automounter on linux at least is very irresponsible and frequent restarts cause dangling mounts which get umount attempts every timeout interval. I haven't tried it on FreeBSD but it may have the same misbehavior. rpc.statd likes to grow without bound, at least on 4.x; you may need to restart it periodically. I've had to bounce statd once or twice on my workstation, which also serves the ports tree to a set of build servers. -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org
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