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Why does PRTG's "WMI Process Sensor" show a CPU load of 230% for a process?



I am monitoring a multithreaded and CPU intensive process unsing the "WMI Process Sensor" and I get 200% CPU load and more. What does this mean?

cpu-load wmi wmi-process-sensor

Created on Feb 2, 2010 1:10:46 PM by  Dirk Paessler [Founder Paessler AG] (11,025) 3 6

Last change on Mar 11, 2010 12:35:31 PM by  Daniel Zobel [Product Manager]

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Accepted Answer



On multicore systems this value can be per CPU. The maximum value then is 100% * core count. If you get a value of 200% on a 4 core system (maximum 400%) this equals a system usage of 50%.

In this case a single thread can never go above 100% (using one full CPU), but a multi-threaded application can go up to 400%.

Note that because of rounding and measurement timing, 1-5% variation above/below the maximum (e.g.102%) is possible.

Created on Feb 2, 2010 1:10:57 PM by  Dirk Paessler [Founder Paessler AG] (11,025) 3 6

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