Date: Tue, 22 May 2018 14:38:36 +0200 From: Luciano Mannucci <luciano@vespaperitivo.it> To: freebsd-current@freebsd.org Subject: Re: Deadlocks / hangs in ZFS Message-ID: <40qwDY04nmz5DvX@baobab.bilink.it> In-Reply-To: <20180522101749.Horde.Wxz9gSxx1xArxkYMQqTL0iZ@webmail.leidinger.net> References: <20180522101749.Horde.Wxz9gSxx1xArxkYMQqTL0iZ@webmail.leidinger.net>
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On Tue, 22 May 2018 10:17:49 +0200 Alexander Leidinger <Alexander@leidinger.net> wrote: > does someone else experience deadlocks / hangs in ZFS? I did experience ZFS hangs on heavy load on relatively big iron (using rsync, in my case). Theh was cured by reducing the amount of available RAM to the zfs caching mechanism. Parameters in /boot/loader.conf vfs.zfs.vdev.cache.size and vfs.zfs.arc_max may be your friends. On a 16G machine not showing the syptoms anymore I have set: kern.maxusers="4096" vfs.zfs.vdev.cache.size="5G" vfs.zfs.arc_min="1228800000" vfs.zfs.arc_max="9830400000" hope it helps, Luciano. -- /"\ /Via A. Salaino, 7 - 20144 Milano (Italy) \ / ASCII RIBBON CAMPAIGN / PHONE : +39 2 485781 FAX: +39 2 48578250 X AGAINST HTML MAIL / E-MAIL: posthamster@sublink.sublink.ORG / \ AND POSTINGS / WWW: http://www.lesassaie.IT/
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