On Oct 6, 2011, at 5:19 AM, Frank Van Damme <frank.vanda...@gmail.com> wrote:

> Hello,
> 
> quick and stupid question: I'm breaking my head over how to tunz
> zfs_arc_min on a running system. There must be some magic word to pipe
> into mdb -kw but I forgot it. I tried /etc/system but it's still at the
> old value after reboot:
> 
> ZFS Tunables (/etc/system):
>         set zfs:zfs_arc_min = 0x200000
>         set zfs:zfs_arc_meta_limit=0x100000000

It is not uncommon to tune arc meta limit. But I've not seen a case
where tuning arc min is justified, especially for a storage server. Can
you explain your reasoning?
 -- richard

> 
> ARC Size:
>         Current Size:             1314 MB (arcsize)
>         Target Size (Adaptive):   5102 MB (c)
>         Min Size (Hard Limit):    2048 MB (zfs_arc_min)
>         Max Size (Hard Limit):    5102 MB (zfs_arc_max)
> 
> 
> I could use the memory now since I'm running out of it, trying to delete
> a large snapshot :-/
> 
> -- 
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