From: Reuti <reuti@staff.uni-marburg.de>
Subject: Re: rpc.mountd at 99% cpu
Date: Thu, 29 Sep 2005 21:52:04 +0200
Message-ID: <20050929215204.85kt3qx0hwf4kc00@home.staff.uni-marburg.de>
References: <433C3C87.4040401@anl.gov>
	<20050929213533.koygqlpb3hy8ogsg@home.staff.uni-marburg.de>
	<433C43AE.5060709@anl.gov>
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Cc: nfs@lists.sourceforge.net
To: Brian Elliott Finley <finley@anl.gov>
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Typo: the one I meant was /proc/fs/nfsd - is there anything in this directory?

-- Reuti

Zitat von Brian Elliott Finley <finley@anl.gov>:

> Reuti,
>
> Thanks for your reply, but I'm afraid /proc/nfs/nfsd is *not* currently
> mounted.
>
> Cheers, -Brian
>
>
> Reuti wrote:
>
>> Brian,
>>
>> is there a file system mounted in /proc/nfs/nfsd - then nfsd is working
>> in a new
>> mode? You can try *not* to mount it in the start/stop-script of the NFS
>> server.
>> This way you will force nsfd to operate in a legacy mode. If you
>> followed my
>> posts last week, this solved a problem with stale file handles for me.
>>
>> Cheers - Reuti
>>
>>
>> Zitat von Brian Elliott Finley <finley@anl.gov>:
>>
>> > I've got an nfs server (quad cpu amd64, 36G mem, failover fiberchannel)
>> > running ubuntu, and I'm getting the following behavior that I haven't
>> > been able to track down yet:
>> >
>> >    * rpc.mountd spikes to 99% cpu usage when a client machine mounts,
>> >      causing a temporary disruption in service to all client systems
>> >
>> > Google, NFS Howtos, NFS Perf Tuning docs, IRC (can't find an NFS
>> > specific IRC channel), local sysadmins all turn up nothing so far.  Here
>> > are potentially relavant data:
>> >
>> >    * exportfs -v -o rw,secure,sync,no_root_squash
>> >      10.10.0.0/255.255.0.0:/export/home
>> >    * nfs server has all clients info in /etc/hosts
>> >    * /etc/hosts is first in nsswitch.conf
>> >    * kernel is ubuntu's: linux-image-2.6.10-5-amd64-k8-smp
>> >    * nfs performance is fine once a filesystem is mounted
>> >    * unless, someone else is mounting a filesystem, in which case
>> >      already mounted filesystems
>> >    * only 8 clients
>> >    * home directories mounted by autofs on clients as
>> >      server:/export/home/bob /home/bob
>> >    * 32 nfsd threads
>> >    * % netstat -in
>> >      Kernel Interface table
>> >      Iface   MTU Met   RX-OK RX-ERR RX-DRP RX-OVR   TX-OK TX-ERR TX-DRP
>> >      TX-OVR Flg
>> >      eth0   1500 0  247854230      0      0      0324570001      0
>> >      0      0 BMRU
>> >      eth1   1500 0  1022171197      0      0      0258643880
>> >      0      0      0 BMR U
>> >      lo    16436 0    419024      0      0      0  419024      0
>> >      0      0 LRU
>> >    * % cat /proc/net/rpc/nfsd | grep ^th
>> >      th 32 8229 13759.142 6537.314 1919.479 4.212 129.977 52.636 11.780
>> >      10.231 0.000 101.321
>> >    * caching bind9 installed on server, and it points to itself for
>> >      first nameserver entry
>> >
>> > Any one know what's up here?  Or how I can tell what's making rpc.mountd
>> > take so much time?
>> >
>> > --
>> > Brian Elliott Finley
>> > Linux Strategist, CIS
>> > Desk: 630.252.4742
>> > Cell: 630.631.6621
>> >
>> >
>> >
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>>
>>
>>
>>
>>
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>
> --
> Brian Elliott Finley
> Linux Strategist, CIS
> Desk: 630.252.4742
> Cell: 630.631.6621
>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by:
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> https://lists.sourceforge.net/lists/listinfo/nfs
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