Re: Is there any way to increase the KVM?

On Thu, Jun 5, 2008 at 12:31 AM, Dag-Erling Smørgrav <des@xxxxxx> wrote:
"Tz-Huan Huang" <tzhuan@xxxxxxxx> 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@ds4 ~% uname -a
FreeBSD ds4.des.no 8.0-CURRENT FreeBSD 8.0-CURRENT #27: Sat Feb 23 01:24:32 CET 2008 des@xxxxxxxxxx:/usr/obj/usr/src/sys/ds4 amd64
des@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@ds4 ~% zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
raid 1.45T 435G 1.03T 29% ONLINE -
des@ds4 ~% zfs list | wc -l
210

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

Thanks for your information, the major difference is that we
runs on 7-stable and the size of our zfs pool is much bigger.

root@cml2$ uname -a
FreeBSD cml2.csie.ntu.edu.tw 7.0-STABLE FreeBSD 7.0-STABLE #40: Sat
May 31 10:29:16 CST 2008
root@xxxxxxxxxxxxxxxxxxxx:/usr/local/obj/usr/local/src/sys/CML2 amd64
root@cml2$ 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: 0
vm.kmem_size_max: 1,610,612,736
vm.kmem_size: 1,610,612,736
vfs.zfs.arc_min: 16,777,216
vfs.zfs.arc_max: 67,108,864
root@cml2$ zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
sun 11.3T 9.03T 2.30T 79% ONLINE -
root@cml2$ zfs list | wc -l
295

Thanks,
Tz-Huan
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