Date: Mon, 5 Apr 2010 10:55:00 +0400 From: Mikle Krutov <nekoexmachina@gmail.com> To: Wes Morgan <morganw@chemikals.org> Cc: freebsd-fs@freebsd.org Subject: Re: Strange ZFS performance Message-ID: <20100405065500.GB48707@takino.homeftp.org> In-Reply-To: <alpine.BSF.2.00.1004042207410.97855@ibyngvyr> References: <20100404191844.GA5071@takino.homeftp.org> <alpine.BSF.2.00.1004042207410.97855@ibyngvyr>
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On Sun, Apr 04, 2010 at 10:08:21PM -0500, Wes Morgan wrote: > On Sun, 4 Apr 2010, Mikle wrote: > > > Hello, list! I've got some strange problem with one-disk zfs-pool: > > read/write performance for the files on the fs (dd if=/dev/zero > > of=/mountpoint/file bs=4M count=100) gives me only 2 MB/s, while reading > > from the disk (dd if=/dev/disk of=/dev/zero bs=4M count=100) gives me > > ~70MB/s. pool is about 80% full; PC with the pool has 2GB of ram (1.5 of > > which is free); i've done no tuning in loader.conf and sysctl.conf for > > zfs. In dmesg there is no error-messages related to the disk (dmesg|grep > > ^ad12); s.m.a.r.t. seems OK. Some time ago disk was OK, nothing in > > software/hardware has changed from that day. Any ideas what could have > > happen to the disk? > > Has it ever been close to 100% full? How long has it been 80% full and > what kind of files are on it, size wise? No, it was never full. It is at 80% for about a week maybe. Most of the files are the video of the 200MB - 1.5GB size per file. -- Wbr, Krutov Mikle
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