Date: Sun, 4 May 2008 11:03:30 +0200 From: "Daniel Andersson" <engywook@gmail.com> To: yalur@mail.ru Cc: freebsd-fs@freebsd.org Subject: Re: Choppy performance. Message-ID: <24adbbc00805040203nbe92a2u140586abbbeb4a73@mail.gmail.com> In-Reply-To: <200805031855.43218.yalur@mail.ru> References: <24adbbc00804151529m2a74085ds468eaac55ba94a32@mail.gmail.com> <200804162212.32560.yalur@mail.ru> <24adbbc00804270501t48b9a1c5le2f1d0bce18572cf@mail.gmail.com> <200805031855.43218.yalur@mail.ru>
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> Sorry, maybe I miss something. > What "memory allocation errors in rtorrent" do you mean? "Storage error: [File chunk write error: Cannot allocate memory]" "Storage error: [File chunk read error: Cannot allocate memory]" It happens with big torrents ~40gb+. It probably happens because I have: send_buffer_size=1M receive_buffer_size=1M 1MB send/receive buffers plus big torrent chunks eats the memory pretty fast. I have it at 1M to lessen the disk load. But maybe I don't need it that high anymore with two zfs disks? > > > > But if it isn't really using that much memory how come I get > > memory allocation errors in rtorrent if there's more memory > > avaliable? > > One week ago was observed problem with write speed on ZFS pool with following > configuration on i386: > > 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! > -- > ________________ > С уважением > Ковтун Руслан mailto <yalur@mail.ru> Cheers! Daniel
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