Date: Fri, 1 May 2009 16:12:39 -0700 From: Louis Kowolowski <louisk@cryptomonkeys.org> To: Pete French <petefrench@ticketswitch.com> Cc: freebsd-stable@freebsd.org Subject: Re: current zfs tuning in RELENG_7 (AMD64) suggestions ? Message-ID: <32A0BDD9-ACF8-43F4-8D2C-0FC151F1D7CB@cryptomonkeys.org> In-Reply-To: <E1LzzjJ-0002eV-5A@dilbert.ticketswitch.com> References: <E1LzzjJ-0002eV-5A@dilbert.ticketswitch.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On May 1, 2009, at 1:53 PM, Pete French wrote: > ... > The tuning isn't there to improve performance, it's there to prevent > the box going titus due to a panic when the ARC gets too big, and > you are missing the mian one, which is to limit the size of the ARC. > On recent versions of BSD (and you are running 7.2, so thats fine) > then > the defaults for kmem size are fine, but you still need something > like this: > > vfs.zfs.arc_max="256M" > > In there to stop the ARC growing. thats the only tuning I have on > my 4 gig machine, which takes a steady stream of data and is used > for taking backup snapshots. ZFS is excellent, and for me is perfectly > stable, to the point where I am starting to roll it out to production > machines, with the above tuning. > I agree, although I'm using 384 instead of 256. My systems have been running in production for almost a year now w/o any ZFS issues. -- Louis Kowolowski louisk@cryptomonkeys.org Cryptomonkeys: http://www.cryptomonkeys.org/~louisk Making life more interesting for people since 1977
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?32A0BDD9-ACF8-43F4-8D2C-0FC151F1D7CB>