On Thu, Jan 17, 2013 at 5:33 PM, Peter Wood <peterwood...@gmail.com> wrote:
> The 'zpool iostat -v' output is uncomfortably static. The values of
> read/write operations and bandwidth are the same for hours and even days.
> I'd expect at least some variations between morning and night. The load on
> the servers is different for sure. Any input?
Without a repetition time parameter, zpool iostat will print exactly once
and exit, and the output is an average from kernel boot to "now", just like
iostat, this is why it seems so static. If you want to know the activity
over 5 second intervals, use something like "zpool iostat -v 5" (repeat
every 5 seconds) and wait for the second and later blocks. The second and
later blocks are average from previous output until "now". I generally use
5 second intervals to match the 5 second commit interval on my pools.
zfs-discuss mailing list