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Date:      Thu, 12 Oct 2017 08:32:54 -0500
From:      Adam Vande More <amvandemore@gmail.com>
To:        Kate Dawson <k4t@3msg.es>
Cc:        FreeBSD Questions <freebsd-questions@freebsd.org>
Subject:   Re: FreeBSD ZFS file server with SSD HDD
Message-ID:  <CA%2BtpaK19v2H0MPOkEKQ7sgJ9hvf4XNgikhhiXVeON3ifK9hwQw@mail.gmail.com>
In-Reply-To: <20171012103809.GF24374@apple.rat.burntout.org>
References:  <20171011130512.GE24374@apple.rat.burntout.org> <CA%2BtpaK3Cga3SKmbKnRts_SSp=D4qk9p%2BaTzNBZeEqDuvQGVd9A@mail.gmail.com> <20171012103809.GF24374@apple.rat.burntout.org>

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On Thu, Oct 12, 2017 at 5:38 AM, Kate Dawson <k4t@3msg.es> wrote:

>
> >
> > set to the default.  Have you tried any other zfs or nfs tuning?  If so,
> > please share those details.
>
>
> vfs.zfs.l2arc_noprefetch=0
>
> zfs get sync tank/exports/xendomu
> NAME                  PROPERTY  VALUE     SOURCE
> tank/exports/xendomu  sync      disabled  local
>
>
> >
> > Does gstat reveal anything useful?
> >
>
> Thanks for this tool... on regular occasions drives show high percentage
> busy
>

The output from arc_summary.pl may be useful to understand ZFS's
performance as well.

-- 
Adam



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