Re: ZFS committed to the FreeBSD base.

On Tue, May 22, 2007 at 10:01:17AM +0100, Vince wrote:
> Darren Reed wrote:
> > On Mon, May 21, 2007 at 04:40:31PM +0100, Vince wrote:
> > ...
> >> I dont suppose that there are any other tunables people could suggest? I
> >> got a shiny new(well old but new to me) dual opteron board and dual 250
> >> sata drives and though i'd try putting it in as my home server with
> >> everything but / on zfs since i've had my /usr/ports on my laptop as
> >> compressed zfs since very shortly after it was commited.
> >> 	After a few kmem_map: too small" panics I re-read this thread and put
> >> vm.kmem_size_max and vm.kmem_size up to 512M and vfs.zfs.arc_min
> >> vfs.zfs.arc_max down to 65 megs. This did get me past "portsnap extract"
> >> but a make buildworld still got me the same panic.  vmstat -z showed a
> >> steady growth. This is with a generic -CURRENT from friday. I'm happy to
> >> provide any useful information once I get home and reboot it.
> > 
> > Are you running the opterons with a 32 or 64 bit kernel?
> > 
> > I set vfs.zfs.arc_max to somewhere between 75% and 80% of vm.kmem_size_max.
> > 
> I'm running i386 more because I had a i386 CD lying around to install
> from and wont be using more than 3Gigs of RAM, than through informed
> choice. It looks like  setting  kern.maxvnodes=50000 has solved it for now.
> 
> (after almost a day of uptime including building world and adding the
> 2nd disk to the zfs mirror)
> [root_at_crab ~]# vmstat -m | grep sol
> solaris 188066 139903K       - 164899933
> 16,32,64,128,256,512,1024,2048,4096
> 
> I may reinstall at a later date as this is still very much a box to play
> with, but I gather there is no great gain from going 64 bit other than
> not having to play with PAE if you've got lots or RAM.

I expect there is a huge difference in performance between i386 and
amd64. I'm currently setting up environment to compare ZFS on
FreeBSD/i386, FreeBSD/amd64 and Solaris.

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd_at_FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!