Date: Mon, 10 Feb 2020 08:45:49 +0000 From: Erik Lauritsen <eriklauritsen@yandex.com> To: freebsd-questions@freebsd.org Subject: Re: Bad ZFS performance on the desktop Message-ID: <38784851581324349@sas2-2d551da8e887.qloud-c.yandex.net> In-Reply-To: <20200210074555.7f409476708f05bd10c1efb0@sohara.org> References: <17394471581319158@vla1-b55dfea406f0.qloud-c.yandex.net> <20200210074555.7f409476708f05bd10c1efb0@sohara.org>
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> On Mon, 10 Feb 2020 07:19:18 +0000 > Erik Lauritsen <eriklauritsen@yandex.com> wrote: > >> I have monitored ZFS using 'top' and can see that it never eats >> more than half of my memory, so it's not because I'm out of >> memory. > > Is there any sign of swap activity ? This sounds a lot like swap > thrashing. There is no swap activity. I have 16 GB in the box and the ARC is set to 10GB, but it never reaches that. Also top shows that the swap is free all the time: Swap: 2048M Total, 2048M Free >> I'm thinking about getting a couple of SSDs, but then again I use >> backup meticulously and perhaps ZFS on a single drive or just UFS >> is better for the desktop? > > I'm using ZFS on a single SSD for boot (with everything important > mounted from a NAS running a bunch of mirrors), it's fast but I did have to > set vfs.zfs.arc_max in /boot/loader.conf (to 2GB on my 8GB machine) in > order to stop browsers thrashing swap. > -- > Steve O'Hara-Smith <steve@sohara.org> > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
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