8.0-R-p2 ZFS: unixbench causing kmem exhaustion panic

Doug Poland doug at polands.org
Wed Jan 13 18:12:11 UTC 2010

On Wed, January 13, 2010 11:55, Ivan Voras wrote:
> Doug Poland wrote:
>> So the question is, can ZFS be tuned to not panic or hang no matter
>> what I throw at it?
> Apparently not.
>  > I began with a system with no tunables in /boot/loader.conf
>  > (vm.kmem_size and vm.kmem_size_max).  Then I tried increasing
>  > vm.kmem_size and vm.kmem_size_max a GB at a time, until I was at
> 4GB.
> Try adding vfs.zfs.arc_max=512M to /boot/loader.conf.
Would you suggest tweaking the vm.kmem_size tunables in addition to


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