Nagios Support Forum

Posted: **Thu Dec 20, 2012 1:19 pm**

Hello! I have another question for you regarding a linux memory check.

I'm running the following command from the nagios server against a Ubuntu 10.04.4 box:

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$USER1$/check_nrpe -H $HOSTADDRESS$ -t 30 -c check_mem -a '-w 20 -c 10 -n'

I'm using the "-n" switch to include cached memory in the free space count (as shown here: http://support.nagios.com/wiki/index.ph ... ree_Memory)

The result is:

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CRITICAL - 2352 / 3964 MB (%) Free Memory, Used: 3543 MB, Shared: 0 MB, Buffers: 118 MB, Cached: 1931 MB

My question is why is it still reporting as critical, and also why doesn't a percentage show? I have already run apt-get install bc on this box and it says the most recent version of bc is already installed.

Thanks!

Posted: **Thu Dec 20, 2012 2:22 pm**

The -n switch is found in the custom_mem_check plugin, and as far as I know, the switch is not available in the standard check_mem plugin. Download the custom_mem_check plugin from http://assets.nagios.com/downloads/nagi ... _check_mem

Posted: **Thu Dec 20, 2012 2:26 pm**

the package actually needed is dc

run

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apt-get install dc

In Ubuntu dc stands alone, on CentOS and RHEL dc comes in bc...

I know it's confusing...

Posted: **Thu Dec 20, 2012 2:34 pm**

Thanks Scott, that was it! Installed dc and everything looks good.

Thanks again for the quick reply!

Nagios Support Forum

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