Brian Kroth <bpkr...@gmail.com> 2010-04-26 09:17: > Hello all, > > I've got a moderately active mail system running on OCFS2. It's been on > fresh volume for about 9 months now, however only ever with one node > active at a time. For the most part it's been very happy, however > recently we started experiencing very noticeable and periodic but short > lived slowdowns. From all of the graphs and measurements I've been > doing the IO system seems bored (not much more than ~200 IOPS even, and > typically less on a 14 disk raid 50 with 15K disks). We haven't changed > anything recently and I'm having trouble nailing down the cause. Given > all the talk about ENOSPC and fragmentation of late it's growing on my > list of worries. Can someone please take a look at my stat_sysdir > output and give me a quick opinion of whether or not they think that > might be and issue? > > Thanks for your help, > Brian > > > We're running Debian Lenny with a 2.6.30 kernel in VMWare ESX 4. > > # dpkg -l | grep -i ocfs2 > ii ocfs2-tools 1.4.2-1
First, sorry for spamming everyone's mailbox by attaching that dump last time. I should have posted it somewhere. Unfortunately, we've gotten confirmation that we hit the infamous ENOSPC bug [1] in error messages stating the inability to store new mail messages. We performed the recommended reduction in slots from 8 to 4 and things are temporarily up and running again. However, I'm curious if you have any thoughts on how much time or # of files we've bought ourselves by doing this. Ideally we'd like to be able to hold out for another month when there's a mandatory "holiday" so that no you can use the system anyways before we do our total overhaul fix. Here's the results of two stat_sysdir.sh dumps. http://cae.wisc.edu/~bpkroth/public/ocfs2/ Thanks very much, Brian [1] http://oss.oracle.com/bugzilla/show_bug.cgi?id=1189
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