Is there any way to increase the KVM?

[Tz-Huan Huang]

On Thu, Jun 5, 2008 at 12:31 AM, Dag-Erling Smørgrav <des at des.no> wrote:
> "Tz-Huan Huang" <tzhuan at csie.org> 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 ds4.des.no 8.0-CURRENT FreeBSD 8.0-CURRENT #27: Sat Feb 23 01:24:32 CET 2008     des at ds4.des.no:/usr/obj/usr/src/sys/ds4  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
>     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 at 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 at cml2.csie.ntu.edu.tw:/usr/local/obj/usr/local/src/sys/CML2  amd64
root at 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 at cml2$ zpool list
NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
sun                    11.3T   9.03T   2.30T    79%  ONLINE     -
root at cml2$ zfs list | wc -l
     295

Thanks,
Tz-Huan