Memory Usage reporting incorrectly

[asurint]

I am running Nagios XI ver 2011 2.1 as a vm (downloaded virtual appliance from nagios.org). The host OS is cent OS 6.2
I am running nsclient++ 3.9.330 on windows clients.
nagios is reporting memory usage incorrectly (using check_xi_service_nsclient), reporting double the physical ram. It seems to be doing this on 32 and 64 bit hosts. I have been reading on it (not an uncommon problem) and cannot find a solution that will work for us.
I have tried configuring check_nrpe, but have yet to get that working either.

Any advice would be greatly appreciated as our alerting is not accurate at this time.

Thanks in advance,
Mark

[scottwilkerson]

With the check you describe it report ALL memory combined physical and paged.

The resolution to this is to use check_nrpe with NSClient++ checkmem found in this thread.
support.nagios.com/forum/viewtopic.php?f=7&t=5411&p=24099#p24099

[asurint]

I followed the instructions you linked to, but it's still not working. I can test it using the check_nrpe and it says it's fine, but it won't report actual values when they are added to the command. I get the error message CHECK_NRPE: Received 0 Bytes from daemon. Check remote server logs for error messages.

Any help would be appreciated.

Thanks,
Mark

[scottwilkerson]

what is the exact command you are running?

[asurint]

I configured a couple using the configuration wizard
$USER1$/check_nrpe -H $HOSTADDRESS$ -t 30 -c $ARG1$ $ARG2$

Then tried this ussing ssh to connect to the nagios server
/usr/local/nagios/libexec/check_nrpe -H 172.20.31.150 -c check_mem -a '-w 90 -c 98'

I tried different arguments at the end, but they all return the error posted above.

Thanks for your help!
Mark

[lmiltchev]

On your windows machine:

Open the NSC.ini file and make sure you have the following line under [External Alias]:

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alias_mem=checkMem MaxWarn=90% MaxCrit=98% ShowAll=long type=physical

Restart the nsclient++ service.

On your nagios server:

Test the following command in the command line:

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/usr/local/nagios/libexec/check_nrpe -H <windows_machine_IP> -t 30 -c alias_mem

Hope this helps.

[asurint]

That line was un commented in the nsc.ini file. I did add the =long after showall and restart the service
When I ran the command from the nagios server I received the same error
Check_nrpe: Received 0 bytes from the daemon

Thanks,
Mark

[yancy]

asurint,

can you verify if check_nrpe is working at all with the following command:

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/usr/local/nagios/libexec/check_nrpe -H <windows_machine_IP>

Regards,

-Yancy

[asurint]

That seems to work, responds seem to be doing fine.

[scottwilkerson]

In the modules section of the NSC.ini do you have

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CheckExternalScripts.dll

This is required.