Messages in this thread | | | From | Al Boldi <> | Subject | Re: top lies ? | Date | Tue, 13 Nov 2007 10:38:26 +0300 |
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Balbir Singh wrote: > On Nov 13, 2007 12:38 PM, Al Boldi <a1426z@gawab.com> wrote: > > kloczek wrote: > > > Some data showed by top command looks like completly trashed. > > > Fragment from top output: > > > > > > Mem: 2075784k total, 2053352k used, 22432k free, 19260k > > > buffers Swap: 2096472k total, 136k used, 2096336k free, > > > 1335080k cached > > > > > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ SWAP nFLT WCHAN COMMAND > > > 14515 mysql 20 0 1837m 563m 4132 S 39 27.8 27:14.20 1.2g 18 - mysqld > > > > > > How it is possible that swap ussage is 136k and swapped out portion of > > > (in this case) mysqld process is 1.2g ? > > > > Welcome to OverCommit, aka OOM-nirvana. > > > > Try this: > > # echo 2 > /proc/sys/vm/overcommit_memory > > # echo 0 > /proc/sys/vm/overcommit_ratio > > > > But make sure you have enough swap. > > > > > > Thanks! > > The swap cache looks pretty big, may be top is including that data > while reporting swap usage.
I don't think so. top reports correctly, it's the VM that is lying. I guess you can tell what happens when push comes to shove...
Thanks!
-- Al
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