prefetch change in ZFS

Kip Macy kmacy at freebsd.org
Wed Jun 10 22:42:34 UTC 2009


This is on HEAD until MFC.
-Kip

On Wed, Jun 10, 2009 at 2:56 PM, Graham Todd<gtodd at bellanet.org> wrote:
> Kip Macy wrote:
>> Prefetch is still enabled by default on non-i386 systems with more
>> than 4GB. To unconditionally enable or disable, set
>> "vfs.zfs.prefetch_enable" in loader.conf.
>
> So is this a change of OID as well (i.e. to "vfs.zfs.prefetch_enable")?
>
> Here prefetch is enabled by default on a 2GB RAM 7.2-RELEASE system (ZFS
> version 6) by setting *vfs.zfs.prefetch_disable* to 0.
>
> ninga# sysctl vfs.zfs | grep fetch
> vfs.zfs.prefetch_disable: 0
>
> cheers,
>



-- 
When bad men combine, the good must associate; else they will fall one
by one, an unpitied sacrifice in a contemptible struggle.

    Edmund Burke


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