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="YES" ahci_load="YES" vm.kmem_size=2G vm.kmem_size_max=2G vfs.root.mountfrom="zfs:zroot" vfs.zfs.prefetch_disable=1 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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