I have NFS sharing a ZFS pool that VMware esxi stores files on. When
put under stress (an OS installation, but not Linux compilation), the
NFS server locks, spiking to 100% CPU usage. Not even kill -KILL can
stop the process, so rebooting is required.
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
885 root 4 44 0 5804K 988K CPU2 0 239:39 100.00% nfsd
Other people have run into this problem, but I never found a solution.
I'm running 8.1-PRERELEASE on amd64, but I think others have seen the
problem on 8.1-RELEASE.
zpool status reports that the pool is healthy, so that's not it. My
only two ideas are hosting on something other than ZFS and trying to
reproduce it with a lot of big, random NFS requests. Any other ideas?
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