Date: Tue, 29 May 2007 01:14:55 +0200 From: =?iso-8859-1?Q?St=E5le?= Kristoffersen <staalebk@ifi.uio.no> To: Huang wen hui <huang@gddsn.org.cn> Cc: current@freebsd.org Subject: Re: zfs generate a lot of IO ? Message-ID: <20070528231455.GB14746@eschew.pusen.org> In-Reply-To: <46595D43.2090102@gddsn.org.cn> References: <46595D43.2090102@gddsn.org.cn>
next in thread | previous in thread | raw e-mail | index | archive | help
On 2007-05-27 at 10:28, Huang wen hui wrote: > hi, > I install CURRENT with zfs root fs on my notebook(T60P). GENERIC > configuration > without INVARIANTS and WITNESS. > I run a program to test. This program basically read a few small files > and calcuate and output a small file. > On FreeBSD6.2, iostat show that It generate a few io operation. > But on zfs, generate a lot: <snip> This could be the same thing Nick Gustas and I have been seeing. Try setting vfs.zfs.prefetch_disable="1" in loader.conf, this made things "normal" for me. -- Ståle Kristoffersen staalebk@ifi.uio.no
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070528231455.GB14746>