Date: Mon, 18 Mar 2013 20:20:04 +0100 From: Davide D'Amico <davide.damico@contactlab.com> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-fs@freebsd.org Subject: Re: FreBSD 9.1 and ZFS v28 performances Message-ID: <4280fd76b9b18376e11e90705e0c736c@sys.tomatointeractive.it> In-Reply-To: <A9C89C979F8D4CBABE73256A1C66E95D@multiplay.co.uk> References: <514729BD.2000608@contactlab.com> <810E5C08C2D149DBAC94E30678234995@multiplay.co.uk> <51473D1D.3050306@contactlab.com> <1DD6360145924BE0ABF2D0979287F5F4@multiplay.co.uk> <51474F2F.5040003@contactlab.com> <E106A7DB08744581A08C610BD8A86560@multiplay.co.uk> <51475267.1050204@contactlab.com> <514757DD.9030705@contactlab.com> <A9C89C979F8D4CBABE73256A1C66E95D@multiplay.co.uk>
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[...] > Oh and another thing if this is mysql did you set the right settings > for your ZFS volume e.g. > zfs set atime=off tank > zfs create tank/mysql > zfs set recordsize=16k tank/mysql # zfs get all DATA | egrep -e "atime|record" DATA recordsize 16K local DATA atime off local I didn't create tank/mysql, I issued: # zpool create DATA mirror ... # cd /DATA # zfs set atime=off DATA # zfs set recordsize=16k DATA # mkdir mysql # chown mysql:mysql mysql # cp -Rp /repo/mysql/* /DATA/mysql [..] # I think it's the same. I've used: vfs.zfs.prefetch_disable="1" and vfs.zfs.prefetch_disable="0" same result. I tried enabling/disabling in /boot/loader.conf (I have 32GB ram): vfs.zfs.arc_min="4096M" vfs.zfs.arc_max="15872M" vm.kmem_size_max="64G" vm.kmem_size="49152M" vfs.zfs.write_limit_override=1073741824 same result. Thanks, d.
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