PRTG Manual: CPU Load Poller
The CPU Load poller allows you to monitor the real time CPU load of devices on a timed interval.
The CPU poller can be launched from the 'Tools' tab on the main view of UVexplorer. It can also be launched from the device context menu available on the device grid and the topology map.
To poll the device CPU load with the CPU poller you add and select devices in the device grid, set the poll interval, and press the start button. The poller will continue to poll the devices until the dialog is closed or the stop button is pressed. The CPU load query uses SNMP to query the CPU load from the devices. Devices must have SNMP credentials assigned to them for the query to succeed. See Managing Device Credentials for more information about managing credentials.
To add devices to the poller press the add button 
above the device grid. Devices added to the poller will only be polled when they are selected using the check box next to the device. If a poll is in process when a new device is added and selected the poller must be restarted before the newly selected device will be included in the poll.
The interval sets the frequency of the poll in seconds; the max interval is 120 seconds. The interval can only be changed when the poller is not running.
The results chart contains the CPU load and poll intervals of the devices being polled. The CPU load is displayed as a percentage. The interval contains the time the poll was performed. The legend maps the devices to the load percentage lines in the chart.
The results grid displays the devices and their CPU load percentages over time.
The 'Name' column contains the display name of the polled device.
The 'IP Address' column contains the primary IP address of the polled device.
The 'CPU Name' column displays the name of the processor when available. If there isn't a name the processor index may be used.
The 'Load' column displays the CPU load as a percentage of the processors capacity. Historical load values are also presented over a period of time.
All of these respective load columns display CPU loads based on their average over the indicated time (i.e. 5 seconds or 5 minutes). Not all devices support querying this information; but when it is available, the tool will display the collected values.
