Is there any way to increase the KVM?

Dag-Erling Smørgrav des at
Wed Jun 4 16:46:52 UTC 2008

"Tz-Huan Huang" <tzhuan at> writes:
> The vfs.zfs.arc_max was set to 512M originally, the machine survived for
> 4 days and panicked this morning. Now the vfs.zfs.arc_max is set to 64M
> by Oliver's suggestion, let's see how long it will survive. :-)

des at ds4 ~% uname -a        
FreeBSD 8.0-CURRENT FreeBSD 8.0-CURRENT #27: Sat Feb 23 01:24:32 CET 2008     des at  amd64
des at ds4 ~% sysctl -h vm.kmem_size_min vm.kmem_size_max vm.kmem_size vfs.zfs.arc_min vfs.zfs.arc_max
vm.kmem_size_min: 1,073,741,824
vm.kmem_size_max: 1,073,741,824
vm.kmem_size: 1,073,741,824
vfs.zfs.arc_min: 67,108,864
vfs.zfs.arc_max: 536,870,912
des at ds4 ~% zpool list
NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
raid                   1.45T    435G   1.03T    29%  ONLINE     -
des at ds4 ~% zfs list | wc -l

Haven't had a single panic in over six months.

Dag-Erling Smørgrav - des at

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