Date: Sun, 4 May 2008 16:08:02 +0200 From: Gary Jennejohn <gary.jennejohn@freenet.de> To: "Daniel Andersson" <engywook@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: Choppy performance. Message-ID: <20080504160802.745afcc2@peedub.jennejohn.org> In-Reply-To: <24adbbc00805040203nbe92a2u140586abbbeb4a73@mail.gmail.com> References: <24adbbc00804151529m2a74085ds468eaac55ba94a32@mail.gmail.com> <200804162212.32560.yalur@mail.ru> <24adbbc00804270501t48b9a1c5le2f1d0bce18572cf@mail.gmail.com> <200805031855.43218.yalur@mail.ru> <24adbbc00805040203nbe92a2u140586abbbeb4a73@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sun, 4 May 2008 11:03:30 +0200 "Daniel Andersson" <engywook@gmail.com> wrote: > > vm.kmem_size_max="1073741824" > > vm.kmem_size="1073741824" > > KVA_PAGES=512 > > Write speed in 8 disks (raidz) is 40 Mb/sec and very choppy. > > If I change to vm.kmem_size_max="999M", write speed increase in 4 times > > (160Mb/sec). I think this is bug. > > What is yours configuration? > > > My loader.conf(AMD64): > > vfs.zfs.prefetch_disable=1 > vm.kmem_size_max="1073741824" > vm.kmem_size="1073741824" > > I'll try setting it to 999M instead, thanks! > I just tried setting it to 999M for kicks (amd64) and saw no significant speed up doing a ``make -j4 buildworld''. I only saw a time difference of 20 seconds between 1024M and 999M, which is just in the noise. --- Gary Jennejohn
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20080504160802.745afcc2>