From owner-freebsd-fs@FreeBSD.ORG Thu Mar 4 23:40:03 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 402651065672 for ; Thu, 4 Mar 2010 23:40:03 +0000 (UTC) (envelope-from me@lexasoft.ru) Received: from relay.wahome.ru (relay.wahome.ru [95.211.21.141]) by mx1.freebsd.org (Postfix) with ESMTP id 0A0958FC16 for ; Thu, 4 Mar 2010 23:40:02 +0000 (UTC) Received: from mmx.lexasoft.ru (mmx.lexasoft.ru [92.241.160.6]) by relay.wahome.ru (Postfix) with ESMTP id 3653A6B218A for ; Fri, 5 Mar 2010 02:17:36 +0300 (MSK) Received: from [10.100.0.2] (petrovich-telecom-gw.wahome.ru [77.91.225.38]) by mmx.lexasoft.ru (Postfix) with ESMTPSA id 88CB428491; Fri, 5 Mar 2010 02:20:11 +0300 (MSK) From: Alexey Tarasov Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Date: Fri, 5 Mar 2010 02:20:09 +0300 Message-Id: To: freebsd-fs@freebsd.org Mime-Version: 1.0 (Apple Message framework v1077) X-Mailer: Apple Mail (2.1077) Cc: Subject: Strange ZFS behaviour with transmission X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Mar 2010 23:40:03 -0000 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