This article applies to PRTG Network Monitor 13.2.3 through 17.3.33

Device Tree View in PRTG: Number of Instantly Loaded Sensors

As of PRTG version 9, the device tree has two display modes:

• If there are less than 1000 sensors to display, all sensor icons are loaded and displayed immediately and you will not get an additional scrollbar next to the device tree.
• If there are more than 1000 sensors to display, only the first screenpage is loaded and rendered. As soon as you scroll down, the next page is loaded and rendered (which may take a moment). For large installation this approach requires less CPU and network resources.

Why did we do it like that?

This concept allows the user to either quickly move through smaller trees (or sub-trees) or to efficiently work even with huge installations with thousands of sensors.

The second behavior may feel unusual to users of the deprecated PRTG version 8, but it is actually less resource intensive than the old technology.

Can I change this behavior?

Yes.

In our own testing we found that the limit of 1000 sensors worked fine for both worlds. But there may be situations were a higher or lower limit is desired by the user. So we made it editable.

For PRTG 13.2.3 or later you can change the limit by editing the file scripts_custom.js in the folder \PRTG Network Monitor\webroot\javascript.

Open the file in a text editor and add this line to the file:

_Prtg.Core.objects.maxSensorFullSize=2000; //default is 1000

Then reload your browser window completely with the F5 key (it may be necessary to close the browser and restart it to get around caching).

You can play around with this value until it fits your needs.

Note: For PRTG 9 through 12 you can change the limit by editing the file customerscripts.js in the folder \PRTG Network Monitor\website\javascript.

More

You can also edit the width of the column used for the display of groups/devices