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Date:      Thu, 28 Nov 2019 07:26:42 +0000
From:      Steven Hartland <killing@multiplay.co.uk>
To:        Eugene Grosbein <eugen@grosbein.net>
Cc:        FreeBSD stable <freebsd-stable@freebsd.org>
Subject:   Re: Slow zfs destroy
Message-ID:  <CAHEMsqbXKZCwRhqcgJkAMGG=o0Jr5TBn90x22XHx=ng-A2=N7A@mail.gmail.com>
In-Reply-To: <01ca3a41-6cd2-823f-a8c1-30a47a0bbc98@grosbein.net>
References:  <01ca3a41-6cd2-823f-a8c1-30a47a0bbc98@grosbein.net>

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As you mentioned it=E2=80=99s on SSD you could be suffering from poor TRIM
performance from your devices if you run gstat -pd you=E2=80=99ll be able t=
o get an
indication if this is the case.

On Thu, 28 Nov 2019 at 06:50, Eugene Grosbein <eugen@grosbein.net> wrote:

> Hi!
>
> Is it normal that "zfs destroy" for one ZVOL with attribute "used" equal
> to 2112939808 bytes (~2GB)
> takes over two minutes waiting on "tx_sync_done_cv"? The pool is RAID1
> over five SSDs encrypted with GELI
> having ZIL and Cache on distinct unencrypted SSD.
>
> 11.3-STABLE/amd64 r354667. System has 360G RAM and vfs.zfs.arc_max=3D160g=
.
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