NetQoS Performance Center slowly loads views

Document ID : KB000005758
Last Modified Date : 14/02/2018
Show Technical Document Details
Issue:

NetQoS Performance Center has experienced increasing slowness when loading pages with graphical views.

Environment:
Windows Server 2008 R2
Cause:

NPC uses a graphics folder to save temp files of graphics loaded by NPC.  These may be retained for a long time.  Many files may build up in the directory, especially if an auto-refresh is enabled with many graphical view.  This directory is located here:

<InstallDirectory>\portal\WebSite\Graphics

Windows Server doesn't perform well when the file count gets very high.

Resolution:

If you have a very high file count in this folder, it is safe to delete these .PNG files from the folder.  After doing so, you should see a marked performance increase.

Additional Information:

We have observed file counts as high as 1.2 million in this folder.  NPC views were taking as long as 45-60 seconds to load.