Questions about ZFS Tuning

2012-09-17 Thread Jamie Paul Griffin
Hi When I installed FreeBSD on my Lenovo Think Center Desktop I created a full ZFS Root file system using Matthew Seaman's excellent article: http://www.infracaninophile.co.uk/articles/install-on-zfs/ My system now is: /home/jamie $ uname -a FreeBSD kontrol.kode5.net 9.1-PRERELEASE

Re: Questions about ZFS Tuning

2012-09-17 Thread Volodymyr Kostyrko
17.09.2012 13:36, Jamie Paul Griffin wrote: When I installed FreeBSD on my Lenovo Think Center Desktop I created a full ZFS Root file system using Matthew Seaman's excellent article: http://www.infracaninophile.co.uk/articles/install-on-zfs/ My system now is: /home/jamie $ uname -a

Re: Questions about ZFS Tuning

2012-09-17 Thread Jamie Paul Griffin
[ Volodymyr Kostyrko wrote on Mon 17.Sep'12 at 14:25:09 +0300 ] Handbook is old and cripsy about that all thing yet provides a useful link to http://wiki.freebsd.org/ZFSTuningGuide - you don't need kmem_size/arc tuning on amd64 generally; - zfs.zfs.prefetch_disable=0 will cause

Re: Questions about ZFS Tuning

2012-09-17 Thread Mike Clarke
On Monday 17 September 2012 13:20:14 Jamie Paul Griffin wrote: I set zfs.zfs.prefetch_disable=0 because some dmesg line suggested/implied it would benefit. I don't recall the exact output now. If you look in /var/run/dmesg.boot you should find the message saying ZFS NOTICE: Prefetch is

Re: Questions about ZFS Tuning

2012-09-17 Thread Jamie Paul Griffin
[ Mike Clarke wrote on Mon 17.Sep'12 at 18:19:18 +0100 ] On Monday 17 September 2012 13:20:14 Jamie Paul Griffin wrote: I set zfs.zfs.prefetch_disable=0 because some dmesg line suggested/implied it would benefit. I don't recall the exact output now. If you look in /var/run/dmesg.boot