Red Hat Bugzilla – Bug 129156
OOM killer terminating apps while there's still free memory
Last modified: 2007-11-30 17:07:03 EST
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Description of problem:
I have several compute nodes with 6GB of RAM and 2GB of swap, running
primarily ls-dyna, a commercial FEM code compiled for AMD64. On one
of these, a simulation was actively running with a VSS of
2274180 and a RSZ of 652240 (almost a quarter of it is swapped out!).
Another user tried to fire up a simulation that wanted 3371384 of
VSS. The OOM killer swiftly terminated it. Should that happen?
Any way to make it not happen?
Version-Release number of selected component (if applicable):
I've set /proc/sys/vm/inactive_clean_percent to 30 in response to bug
115438 and /proc/sys/vm/pagecache to "1 15 15" in response to bug 118152.
Created attachment 102419 [details]
Memory graph created by Ganglia
Created attachment 102420 [details]
CPU graph created by Ganglia.
Upon further investigation, there may have been enough memory pressure
on the system to trigger OOM after all. I'm going to close this,
since I can't be completely clear on what happened. Sorry for the noise.