On Nov 13, 2007 12:38 PM, Al Boldi <[email protected]> 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.
Balbir
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