Date: Mon, 18 Jul 2011 16:23:34 -0600 From: Mike Shultz <mike@votesmart.org> To: freebsd-fs@freebsd.org Cc: Clinton Adams <clinton@votesmart.org> Subject: nfsd server cache flooded, try to increase nfsrc_floodlevel Message-ID: <4E24B266.9050108@votesmart.org>
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I ran into an issue today of our server thinking that it was being
flooded and locking our nfs users out. Got a LOT of these messages:
Jul 12 16:08:22 xxxxx kernel: nfsd server cache flooded, try to increase
nfsrc_floodlevel
Our server(`uname -a`): FreeBSD xxxxx 8.2-RELEASE-p2 FreeBSD
8.2-RELEASE-p2 #0: Tue Jun 21 16:52:27 MDT 2011
yyy@xxxxx:/usr/obj/usr/src/sys/XXXXX amd64
I could find no information on nfsrc_floodlevel other than source code
which didn't explain too much about it. I don't know if it's a kernel
config var, or what.
`nfsstat -e` did show this:
CacheSize TCPPeak
16385 16385
So I'm guessing that that is the current cache limit.
The source code and this output suggest that we're just running into the
limit. However, a comment in that source does suggest that "The cache
will still function over flood level" but that doesn't seem to be the
case. I ended up having to revoke the clients and restarting nfsd to get
it operational again.
I would appreciate anyone that could clarify what nfsrc_floodlevel is
and how to go about changing it.
--
Mike Shultz
Information Technology Assistant
Project Vote Smart
Phone: 406-859-8683
Toll Free: 1-888-VOTE-SMART
Jabber/Gtalk: shultzm@gmail.com
Key Server: pgp.mit.edu
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