Date: Tue, 17 Apr 2012 16:56:34 +0400 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: carlopmart <carlopmart@gmail.com> Subject: Re: ZFS options for FreeBSD 8.3 Message-ID: <20120417125634.GA76983@zxy.spb.ru> Resent-Message-ID: <20120417132753.GB76983@zxy.spb.ru> In-Reply-To: <4F8C4F89.7090205@gmail.com> References: <4F8C4F89.7090205@gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, Apr 16, 2012 at 06:57:45PM +0200, carlopmart wrote: > I have installed FreeBSD 8.3 amd64 release in an ESXi server. Due to > some limitations, I can only assign 2GiB of RAM to this virtual machine > and I need to use ZFS as filesystem to store some data (MySQL databases). > > According to http://wiki.freebsd.org/ZFSTuningGuide I have configured > some options: > > vfs.zfs.write_limit_override=268435456 > kern.maxvnodes=250000 > > According to ZFS version, FreeBSD 8,3 comes with version 28, and > reading previous guide there is not need to adjust nothing more. I am boot 9.0 inside ESXi with 256MB RAM. And pass buildworld. /boot/loader.conf: vm.kmem_size="512M" vfs.zfs.txg.timeout="5" vfs.zfs.vdev.cache.size="4M" vfs.zfs.arc_max="16M" > But what about l2arc options?? Do I need to adjust vfs.zfs.arc_max and > vm.kmem_size options?? How can I calculate these values?? vm.kmem_size must be >512M. kernel don't allow to setup vm.kmem_size to more the 2*RAM. zfs don't allow to setup vfs.zfs.arc_max < max(RAM/32, 16MB).
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20120417125634.GA76983>