Issue Plesk Monitoring Disk Threshold Alerts Wrong

[nmdpa3]

Server operating system version

Windows Server 2022

Plesk version and microupdate number

18.0.80 #6

The monitoring threshold on Windows servers is generating disk usage alerts even when actual disk utilization is well below the configured threshold.

For example, the threshold is set to 95%, but alerts are being triggered when disk usage is only around 88%.

This was an issue a month or so ago that I thought had been addressed, but it appears to still be occurring. It’s also possible that a recent update has reintroduced the problem.

Is anyone else seeing this behavior on Windows servers?

 

[Sebahat.hadzhi]

Hi, @nmdpa3 . I can't locate any other cases for similar behavior reported to our support. I will attempt to replicate the issue and get back to you. In the meantime, could you please confirm the Monitoring extension version? Thanks in advance.

 

[nmdpa3]

Thank you.

2.11.3-17990

 

[nmdpa3]

Also, oddly, this only occurs if the space threshold is set to %. If I change it to alert on say 10GB of disk space remaining, the false alerts stop.

 

[Sebahat.hadzhi]

Thank you for the confirmation, @nmdpa3 . I have been monitoring a test server for couple of days now and tried different thresholds/usage amount. Unfortunately, I was unable to replicate the issue. Regardless of how close to the threshold the usage was, I only got the notification once the same was hit. Could you please provide a screenshot of the Disk utilization graph?

 

[nmdpa3]

Thank you for the confirmation, @nmdpa3 . I have been monitoring a test server for couple of days now and tried different thresholds/usage amount. Unfortunately, I was unable to replicate the issue. Regardless of how close to the threshold the usage was, I only got the notification once the same was hit. Could you please provide a screenshot of the Disk utilization graph?

Thanks for taking a look. We haven't been able to reproduce the issue on any of our other Windows/Plesk servers either, so for now we've changed this particular server to monitor available disk space using GB rather than a percentage-based threshold.