Re: ZFS dataset stats

You didn't say how you were accessing that dataset, or what FreeBSD
version you're using.  The dataset stats to update as expected in
response to normal user I/O, but not zfs send/recv.  Maybe there is
another path that bypasses them too.  How are you accessing them?

BTW, sysutils/ztop from ports displays real-time measurements based on
these stats.
-Alan

On Thu, Jul 14, 2022 at 11:05 PM Zane C. B-H <v.velox@vvelox.net> wrote:
>
> So was just looking and for some reason nread etc for the ZFS storage
> stats.
>
> Below is a example of a ZFS dataset being used by CBSD to store a raw
> disk image,
> one that is running currently, but for some reasonn the R/W stats don't
> seem actually update.
>
> kstat.zfs.storage.dataset.objset-0x1d41.nread: 0
> kstat.zfs.storage.dataset.objset-0x1d41.reads: 0
> kstat.zfs.storage.dataset.objset-0x1d41.nwritten: 0
> kstat.zfs.storage.dataset.objset-0x1d41.writes: 0
> kstat.zfs.storage.dataset.objset-0x1d41.dataset_name:
> storage/debian10_test/dsk1.vhd
>
> Is there any way to get ZFS to actually keep these up to date for use
> cases
> like this?
>