check_mem giving wrong values

[Dirk H. Schulz]

Hi folks,

I have Nagios 2.0rc2 running up and fine (on Debian Sarge stable) and 
have started testing check_mem, but it seems to give wrong information:

> /usr/local/nagios/libexec/check_mem -w 70 -c 90
> OK: 11% Used Memory | MemUsed=11%;70;90


So 11 % of used memory? Now that is what free offers:

> free
>              total       used       free     shared    buffers     cached
> Mem:        515892     253588     262304          0      78564     120856
> -/+ buffers/cache:      54168     461724
> Swap:      1048568          0    1048568


And cat /proc/meminfo gives the same values, of course.

Any hint or help is appreciated.

Dirk



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