-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 19 Nov, 2008, at 11:25 , Larry Rosenman wrote: > 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 78681-3893 Well, it looks like that on -current and a 4G amd64 machine probably there is no need to tune anything. Here are my defaults with everything vm and zfs related in loader.conf commented : vm.kmem_size_max: 4509713203 vfs.zfs.arc_max: 863907840 - -- Regards, Nikolay Denev -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (Darwin) iEYEARECAAYFAkkj4OEACgkQHNAJ/fLbfrkuRgCgqwvwgFubaHeL1UL516ITcekI 6e4An2+hUp1V5Ped6BKVJ7LaAoyVahNt =tuNb -----END PGP SIGNATURE-----Received on Wed Nov 19 2008 - 08:48:24 UTC
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