Date: Sun, 4 Apr 2010 22:08:21 -0500 (CDT) From: Wes Morgan <morganw@chemikals.org> To: Mikle <nekoexmachina@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: Strange ZFS performance Message-ID: <alpine.BSF.2.00.1004042207410.97855@ibyngvyr> In-Reply-To: <20100404191844.GA5071@takino.homeftp.org> References: <20100404191844.GA5071@takino.homeftp.org>
next in thread | previous in thread | raw e-mail | index | archive | help
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?
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?alpine.BSF.2.00.1004042207410.97855>