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I have recently set up Nagios Core v4.3.4 which is great so far however I have noticed that the critical warnings for CPU usage are showing as weird numbers like 18446744072952762141% usage
I don't have an example screenshot as it is not happening right now however the alert history shows the below:
Do you know which version of NSClient++ is installed on the remote machine(s)? That's often a very important piece of information when troubleshooting NSClient++ problems.
You might try resetting the Windows performance counters on the remote machine(s) as a first step.
Thanks for your suggestions. I will try a reset of the counters on the most recently affected server however I think this is more widespread and more likely to be a replacement for the CPU check.
That's certainly an option, but I'm pretty sure all of the common Windows-based CPU checks (psutil/NCPA as well I believe) leverage the exact same performance counters that NSClient++ is using in this case. I say that not to discourage you from doing your own investigation (because I could be wrong), but just as as heads-up if you get similar results with different plugins.
stevmorr wrote:Thanks for your suggestions. I will try a reset of the counters on the most recently affected server however I think this is more widespread and more likely to be a replacement for the CPU check.