On Wed, 19 Nov 2008, Jeremy Chadwick wrote: > > Since this is CURRENT, you should be able to increase the kmem_size > and kmem_size_max entries to something larger than 1536M, especially > since the box has 4GB of RAM. (You shouldn't do this on RELENG_7). > > You might also consider disabling prefetch; there are reports of > peoples' boxes locking up hard (requiring a hard reset) when prefetch > is enabled. Others (like myself) just see "better overall system > responsiveness" when prefetch is disabled. Just as a note, with a -CURRENT from shortly after the ZFS upgrade, the vm.kmem* tuneables, without ANY override on my 4G amd64 box: vm.kmem_size_scale: 3 vm.kmem_size_max: 4509713203 vm.kmem_size_min: 0 vm.kmem_size: 1381195776 this is with a 2T zfs array, if that matters. -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 512-248-2683 E-Mail: ler_at_lerctr.org US Mail: 430 Valona Loop, Round Rock, TX 78681-3893Received on Wed Nov 19 2008 - 08:40:31 UTC
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