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Date:      Thu, 8 Aug 2013 06:53:31 +0000
From:      "Eggert, Lars" <lars@netapp.com>
To:        freebsd-current <freebsd-current@freebsd.org>
Cc:        Rick Macklem <rmacklem@uoguelph.ca>
Subject:   nfsd server cache flooded, try to increase nfsrc_floodlevel 
Message-ID:  <D420F15C-C833-438A-9691-96E6C2D8A513@netapp.com>

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Hi,

every few days or so, my -STABLE NFS server (v3 and v4) gets wedged with =
a ton of messages about "nfsd server cache flooded, try to increase =
nfsrc_floodlevel" in the log, and nfsstat shows TCPPeak at 16385. It =
requires a reboot to unwedge, restarting the server does not help.

The clients are (mostly) six -CURRENT nfsv4 boxes that netboot from the =
server and mount all drives from there.

I googled around and saw that others have hit this issue, but I haven't =
seen any resolution posted. I guess I can increase NFSRVCACHE_FLOODLEVEL =
in the source, but I wonder if I wouldn't simply hit the increase value =
after a little while longer...

Lars

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