What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

CPU Load sensor 99%




I've been recieving emails from PTRG with the following message:

'99 % (System CPU Load) is above the error limit of 90 % in System CPU Load. When CPU load on the probe system is very high, measurements may be incorrect'

How do I identify what is causing such a large strain on my DC's CPU?



cpu-load ptrg sensor system-health

Created on Oct 11, 2018 9:14:49 AM

Last change on Oct 11, 2018 10:45:52 AM by  Luciano Lingnau [Paessler]

1 Reply

Accepted Answer



Hello there,
we appreciate your contact.

Based on the error message, your Probe Health sensor is complaining about the CPU usage on a device used as PRTG Probe. Did you install a remote probe on a Domain Controller?

But in any case, please refer to the following KB-Post which approaches the topic "How to identify the culprit for high CPU Usage":

Best Regards,
Luciano Lingnau [Paessler Support]

Created on Oct 11, 2018 12:18:45 PM by  Luciano Lingnau [Paessler]

Last change on Oct 11, 2018 12:18:49 PM by  Luciano Lingnau [Paessler]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.