Disable zfs prefetch by default

[Steven Hartland]

Most of that advice is just FUD.

On 20/02/2015 11:44, Ilya A. Arkhipov wrote:
> Hi All,
>
> We have zfs prefetch enabled by default with > 4GB, but I didn't seen 
> any case for using it, and all tuning guide saying to disable it.
>
> Maybe we disable zfs prefetch by default ? Or could you please provide 
> why it needed.
>
> Thanks in advance.
>