From owner-freebsd-bugs@FreeBSD.ORG Thu Mar 5 06:49:11 2015 Return-Path: Delivered-To: freebsd-bugs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 08AE5891 for ; Thu, 5 Mar 2015 06:49:11 +0000 (UTC) Received: from au-mx41.inxserver.com.au (au-mx41.inxserver.com.au [113.192.45.247]) by mx1.freebsd.org (Postfix) with ESMTP id 44207674 for ; Thu, 5 Mar 2015 06:49:09 +0000 (UTC) Received: from au-mx02d.bo.inxserver.com.au (au-mx02d.bo.inxserver.com.au [10.104.83.62]) by au-mx41.inxserver.com.au (Postfix) with ESMTP id 6BCE710B3EB3 for ; Thu, 5 Mar 2015 17:48:20 +1100 (EST) Received: from localhost (au-mx02.bo.inxserver.com.au [10.104.83.51]) by au-mx02d.bo.inxserver.com.au (Postfix) with ESMTP id 698FE10E311A for ; Thu, 5 Mar 2015 17:48:20 +1100 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=inxserver.com.au; h=x-mailer:list-unsubscribe:list-id:content-type:content-type :mime-version:subject:subject:message-id:reply-to:from:from:date :date:received:received; 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Thu, 5 Mar 2015 13:46:56 +0000 (UTC) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B4D979C5 for ; Thu, 5 Mar 2015 13:46:56 +0000 (UTC) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.14.9/8.14.9) with ESMTP id t25Dku2x034758 for ; Thu, 5 Mar 2015 13:46:56 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 198313] UFS write becomes very slow in some cases Date: Thu, 05 Mar 2015 13:46:56 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.1-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: demon@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter cc Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Mar 2015 13:46:57 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198313 Bug ID: 198313 Summary: UFS write becomes very slow in some cases Product: Base System Version: 10.1-STABLE Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: demon@FreeBSD.org CC: mckusick@FreeBSD.org Hello, I have 94TB h/w raid6 volume with UFS filesystem on it: tunefs: POSIX.1e ACLs: (-a) disabled tunefs: NFSv4 ACLs: (-N) disabled tunefs: MAC multilabel: (-l) disabled tunefs: soft updates: (-n) enabled tunefs: soft update journaling: (-j) disabled tunefs: gjournal: (-J) disabled tunefs: trim: (-t) disabled tunefs: maximum blocks per file in a cylinder group: (-e) 4096 tunefs: average file size: (-f) 16384 tunefs: average number of files in a directory: (-s) 64 tunefs: minimum percentage of free space: (-m) 8% tunefs: space to hold for metadata blocks: (-k) 9136 tunefs: optimization preference: (-o) time tunefs: volume label: (-L) When it is about 5TB free on it (which does not count 8% of reserved space) /dev/mfid0p1 94T 82T 5.1T 94% /opt all write operations on it become very-very slow (1-2 MB/sec). The process which writes data consumes 100% of CPU in system state: {agata}/home/mitya% ps -p 58796 -o systime,usertime SYSTIME USERTIME 0:59.56 0:00.08 58796 mitya 1 103 0 27808K 4820K CPU11 11 0:53 100.00% bsdtar As soon as I free some space, the problem disappears until space fills up again. Since I have the recommended 8% of reserved free space, I expect writes to work well until all free space is exhausted. -- You are receiving this mail because: You are the assignee for the bug.