Date: Fri, 5 Mar 2010 02:20:09 +0300 From: Alexey Tarasov <me@lexasoft.ru> To: freebsd-fs@freebsd.org Subject: Strange ZFS behaviour with transmission Message-ID: <AAD29202-2840-49FA-A6DE-3134B5A299DA@lexasoft.ru>
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Hello. I have a machine with 4x1.5 Tb SATA disks (WDC WD15EARS). HDD's are in = AHCI mode (ada). I use root-on-ZFS with GPT and RAIDZ. I have the following problem: when I run transmission torrent client on = this server, the FS works very slow, all processes hangs in on of the = zfs, zio, tx states. According to gstat disk load changes very fast from 0 to 100%. After = some activity of all disks there is 2-3 seconds of 100% activity of the = 4-th HDD. During this activity FS is inaccessible. I have already = replaced this disk with new one and there were no effect. Is this a bug or some wrong configuration? /boot/loader.conf: zfs_load=3D"YES" ahci_load=3D"YES" vm.kmem_size=3D2G vm.kmem_size_max=3D2G vfs.root.mountfrom=3D"zfs:zroot" vfs.zfs.prefetch_disable=3D1 zpool status pool: zroot state: ONLINE scrub: none requested config: NAME STATE READ WRITE CKSUM zroot ONLINE 0 0 0 raidz1 ONLINE 0 0 0 gpt/disk0 ONLINE 0 0 0 gpt/disk1 ONLINE 0 0 0 gpt/disk2 ONLINE 0 0 0 gpt/disk3 ONLINE 0 0 0 FreeBSD st4 8.0-STABLE FreeBSD 8.0-STABLE #0: Mon Mar 1 17:23:20 UTC = 2010 root@:/usr/obj/usr/src/sys/GENERIC amd64 -- Alexey Tarasov
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