Hello Andrew, thanks for your reply!
Andrew Morton wrote:
On Sun, 5 Aug 2007 19:03:12 +0300 Dimitrios Apostolou <[email protected]> wrote:
was my report so complicated?
We're bad.
Seems that your context switch rate when running two instances of
badblocks against two different disks went batshit insane. It doesn't
happen here.
Please capture the `vmstat 1' output while running the problematic
workload.
The oom-killing could have been unrelated to the CPU load problem. iirc
badblocks uses a lot of memory, so it might have been genuine. Keep an eye
on the /proc/meminfo output and send the kernel dmesg output from the
oom-killing event.
Please see the attached files. Unfortunately I don't see any useful info
in them:
*_before: before running any badblocks process
*_while: while running badblocks process, but without any cron job
having kicked in
*_bad: 5 minutes later that some cron jobs kicked in
About the OOM killer, indeed I believe that it is unrelated. It started
killing after about 2 days, that hundreds of processes were stuck as
running and taking up memory, so I suppose the 256 MB RAM were truly
filled. I just mentioned it because its behaviour is completely
non-helpful. It doesn't touch the badblocks process, it rarely touches
the stuck as running cron jobs, but it kills other irrelevant processes.
If you still want the killing logs, tell me and I'll search for them.
Thanks,
Dimitris
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procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
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