On Thu, Jun 05, 2008 at 01:53:37AM +0800, Tz-Huan Huang wrote: > On Thu, Jun 5, 2008 at 12:31 AM, Dag-Erling Sm??rgrav <[EMAIL PROTECTED]> > wrote: > > "Tz-Huan Huang" <[EMAIL PROTECTED]> 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. :-) > > > > [EMAIL PROTECTED] ~% uname -a > > FreeBSD ds4.des.no 8.0-CURRENT FreeBSD 8.0-CURRENT #27: Sat Feb 23 01:24:32 > > CET 2008 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/ds4 amd64 > > [EMAIL PROTECTED] ~% 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 > > [EMAIL PROTECTED] ~% zpool list > > NAME SIZE USED AVAIL CAP HEALTH ALTROOT > > raid 1.45T 435G 1.03T 29% ONLINE - > > [EMAIL PROTECTED] ~% 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.
I'm don't think the panics are related to pool size. More to the load
and characteristics of your workload.
> [EMAIL PROTECTED] uname -a
> FreeBSD cml2.csie.ntu.edu.tw 7.0-STABLE FreeBSD 7.0-STABLE #40: Sat
> May 31 10:29:16 CST 2008
> [EMAIL PROTECTED]:/usr/local/obj/usr/local/src/sys/CML2 amd64
> [EMAIL PROTECTED] 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
> [EMAIL PROTECTED] zpool list
> NAME SIZE USED AVAIL CAP HEALTH ALTROOT
> sun 11.3T 9.03T 2.30T 79% ONLINE -
> [EMAIL PROTECTED] zfs list | wc -l
> 295
If we're comparing who has bigger... :)
beast:root:~# zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
tank 732G 604G 128G 82% ONLINE -
but:
beast:root:~# zfs list | wc -l
1932
No panics.
PS. I'm quite sure the ZFS version I've in perforce will fix most if not
all 'kmem_map too small' panics. It's not yet committed, but I do want
to MFC it into RELENG_7.
--
Pawel Jakub Dawidek http://www.wheel.pl
[EMAIL PROTECTED] http://www.FreeBSD.org
FreeBSD committer Am I Evil? Yes, I Am!
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