Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-23 Thread jhell
On Sat, 23 Jan 2010 00:19, fbsdlist@ wrote: Good to hear that it's usable for you even on a relatively low-memory system. Now, throw in an SSD for L2ARC, more RAM for ARC (and L2ARC housekeeping) and then it starts to really shine. Can not wait until I can get something like this spinning!. I

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-23 Thread jhell
On Sat, 23 Jan 2010 04:25, Alexander@ wrote: On Fri, 22 Jan 2010 21:39:48 -0500 jhell wrote: On Fri, 22 Jan 2010 11:47, fbsdlist@ wrote: Anyone know if it is adjustable on a system with 1024MB of ram ? Is this just being auto calculated by some other value ? You may want to make sure that

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-23 Thread Alexander Leidinger
On Fri, 22 Jan 2010 20:28:09 -0500 jhell wrote: > > On Wed, 20 Jan 2010 05:14, Alexander@ wrote: > > Quoting jhell (from Tue, 19 Jan 2010 09:45:58 > > -0500): > > > >> On 1/19/2010 5:16 AM, Sherin George wrote: > >>> Thanks Ivan :) > >>> > >>> I found It. add following in /boot/loader.conf >

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-23 Thread Alexander Leidinger
On Fri, 22 Jan 2010 21:39:48 -0500 jhell wrote: > > On Fri, 22 Jan 2010 11:47, fbsdlist@ wrote: > >>> Anyone know if it is adjustable on a system with 1024MB of ram ? > >>> Is this just being auto calculated by some other value ? > > > > You may want to make sure that vm.kmem_size is set to a va

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-22 Thread Artem Belevich
Good to hear that it's usable for you even on a relatively low-memory system. Now, throw in an SSD for L2ARC, more RAM for ARC (and L2ARC housekeeping) and then it starts to really shine. As for better than expected performance, in my not-so scientific benchmarks (copying 10G-large files on 8-disk

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-22 Thread jhell
On Fri, 22 Jan 2010 11:47, fbsdlist@ wrote: Anyone know if it is adjustable on a system with 1024MB of ram ? Is this just being auto calculated by some other value ? You may want to make sure that vm.kmem_size is set to a value much larger than vfs.zfs.arc_max. Default value may be too small t

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-22 Thread jhell
On Wed, 20 Jan 2010 05:14, Alexander@ wrote: Quoting jhell (from Tue, 19 Jan 2010 09:45:58 -0500): On 1/19/2010 5:16 AM, Sherin George wrote: Thanks Ivan :) I found It. add following in /boot/loader.conf === vfs.zfs.arc_max="10244M" === I just thought I w

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-22 Thread Artem Belevich
>> Anyone know if it is adjustable on a system with 1024MB of ram ? Is this >> just being auto calculated by some other value ? You may want to make sure that vm.kmem_size is set to a value much larger than vfs.zfs.arc_max. Default value may be too small to allow such a large ARC. On a side note,

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-22 Thread Alexander Leidinger
Quoting jhell (from Tue, 19 Jan 2010 09:45:58 -0500): On 1/19/2010 5:16 AM, Sherin George wrote: Thanks Ivan :) I found It. add following in /boot/loader.conf === vfs.zfs.arc_max="10244M" === I just thought I would give a shout at this for stable/7 as of la

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-19 Thread jhell
3:15 PM, Ivan Voras wrote: > >> On 01/19/10 10:19, Sherin George wrote: >> >>> Hello, >>> >>> I am trying to tune ZFS file system by setting "zfs_arc_max" value in >>> FreeBSD 8. >>> >>> In solaris, it is achieved like

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-19 Thread krad
2010/1/19 Ivan Voras > On 01/19/10 10:19, Sherin George wrote: > >> Hello, >> >> I am trying to tune ZFS file system by setting "zfs_arc_max" value in >> FreeBSD 8. >> >> In solaris, it is achieved like this >> >> ===

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-19 Thread Sherin George
;> I am trying to tune ZFS file system by setting "zfs_arc_max" value in >> FreeBSD 8. >> >> In solaris, it is achieved like this >> >> = >> For example, if an application needs 5 GBytes of memory on

Re: Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-19 Thread Ivan Voras
On 01/19/10 10:19, Sherin George wrote: Hello, I am trying to tune ZFS file system by setting "zfs_arc_max" value in FreeBSD 8. In solaris, it is achieved like this = For example, if an application needs 5 GBytes of memory on a syst

Setting "zfs_arc_max" value in FreeBSD 8.

2010-01-19 Thread Sherin George
Hello, I am trying to tune ZFS file system by setting "zfs_arc_max" value in FreeBSD 8. In solaris, it is achieved like this = For example, if an application needs 5 GBytes of memory on a system with 36-GBytes of memory, you could s