From mboxrd@z Thu Jan 1 00:00:00 1970 From: "K. Richard Pixley" Subject: server goes pathological Date: Sat, 14 Aug 2010 09:55:46 -0700 Message-ID: <4C66CA92.6030808@noir.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed To: "linux-btrfs@vger.kernel.org" Return-path: List-ID: Ubuntu-10.04, x86, stock. I'm running into a situation where a server goes pathological. Basically, it becomes excruciatingly slow. I can get things through the file system, but a simple file touch can take 6 - 12 hours. Top shows various btrfs processes hard at work - typically 100% of a cpu, (four cpu server), and the machine shows a load of just over 4. Some flush-btrfs, some btrfs-transacti, occasional others. File system is was created with "mkfs.btrfs -m single -d single". The same, (or a substantially similar), problem has arisen once so far on each of three different servers, so I have a good indication that it's not a hardware error. Aside from rebooting, and rebuilding the file system, is there anything I can do to clear this state? Is there any other information I can provide to help debug either what's going on with my server and/or btrfs? --rich