Nagios Support Forum

Hi Team,

We are monitoring our vcentre servers using Vmware Virtualization wizard with the help of box 293 plugin. Below is the status of memory usage for a vcentre servr:

CRITICAL: 'Cluster 1' Memory {Free: -0.899,999,999,999,999 GB (CRITICAL <= 4.79)} {Used: 40.6 GB} {Effective: 39.7 GB} {Total: 47.9 GB}

Here if you see, the total memory is 47.9 GB. But, Nagios is checking something called Effective memory and is giving critical state after comparing threshold value with the same.

We are expecting it to check total memory and not effective memory.

Could you please help us to get this done?
I am attaching the service definition, command definition and service screenshot here.

Thanks in advance!!

It looks like there's a bug in the box23_check_vmware.pl script. Not knowing what is in that script, or where it came from, makes it hard to debug.

Hello,

Thanks for the reply!!

We need a solution for this. Any ways to fix it?
Any idea when this bug will be fixed?

We don't usually fix bugs in third-party scripts. That's up to the third party who wrote it.

I would contact the author of the box23_check_vmware.pl script to report the issue.

There's a bug in the box23_check_vmware.pl script that's causing the amount of free memory to be miscalculated. It's likely a logic error, since there's no way a server can have < 0 free memory. Make it subtract the "used" from the "total" instead of what it's doing; subtracting the "used" from the "effective."

You could open it up yourself in a text editor and fix the bug. This could be an opportunity to send them a PR on GitHub (if it even is on GitHub -- for all I know some employee at your company wrote this). Keep in mind that if it's GPL licensed, you're obligated under the terms of the license to publish the modified source if you change it.