Date: Sun, 4 May 2008 18:11:11 +0300 From: Ruslan Kovtun <yalur@mail.ru> To: gary.jennejohn@freenet.de Cc: freebsd-fs@freebsd.org, Daniel Andersson <engywook@gmail.com> Subject: Re: Choppy performance. Message-ID: <200805041811.11266.yalur@mail.ru> In-Reply-To: <20080504160802.745afcc2@peedub.jennejohn.org> References: <24adbbc00804151529m2a74085ds468eaac55ba94a32@mail.gmail.com> <24adbbc00805040203nbe92a2u140586abbbeb4a73@mail.gmail.com> <20080504160802.745afcc2@peedub.jennejohn.org>
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=F7 =D3=CF=CF=C2=DD=C5=CE=C9=C9 =CF=D4 =F7=CF=D3=CB=D2=C5=D3=C5=CE=D8=C5 04= =CD=C1=D1 2008 Gary Jennejohn =CE=C1=D0=C9=D3=C1=CC(a): > On Sun, 4 May 2008 11:03:30 +0200 > > "Daniel Andersson" <engywook@gmail.com> wrote: > > > vm.kmem_size_max=3D"1073741824" > > > vm.kmem_size=3D"1073741824" > > > KVA_PAGES=3D512 > > > Write speed in 8 disks (raidz) is 40 Mb/sec and very choppy. > > > If I change to vm.kmem_size_max=3D"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=3D1 > > vm.kmem_size_max=3D"1073741824" > > vm.kmem_size=3D"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. So, This bug related with i386 only. > > --- > Gary Jennejohn =2D-=20 ________________ =F3 =D5=D7=C1=D6=C5=CE=C9=C5=CD =EB=CF=D7=D4=D5=CE =F2=D5=D3=CC=C1=CE mailto <yalur@mail.ru>
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