With what brakes on a terminal server can be connected or by means of what it is possible to diagnose?

Question

System administration

With what brakes on a terminal server can be connected or by means of what it is possible to diagnose?
There is a WINDOWS terminal server with Firefox (RemoteApp). At different points in time, terrible brakes begin, but there are no anomalies in the Performance Monitor: -CPU is
70-80%
loaded -Memory is 60%
busy -Avg. Disk Queue Length no higher than 0.2
- Disk activity time 5-10%
- Response Time 3 ms in general
- Approximately 40 - 60 Mb / s is used from a
1Gb / s network - Memory Hard Faults 0-10

From software that can how to influence:
-Casper
-UserGate agent for terminal servers

Presumably this is UserGate Agent, but how to prove it to technical support?
What performance indicators can you still look at to understand what exactly is happening?

Answer 1

Try disabling hardware acceleration in Firefox.

Answer 2

PerfMon is certainly a cool tool...
But my opinion: If you are not Kostya Cherny from MS, then usually problems can be caught and determined in other ways.
Are you sure that the brakes are in the virtual machine / session of the RDP server? and not someone drives backups over the network and put a communication channel?

Answer 3

Measure the bandwidth of the Internet channel. There, the server may also be slowing me down. Further, if you say that often when using firefox, change to opera or something else for a while, because Chrome, for example, scans files in the background, I’m sitting on the phone forgot what the process is called