Monitoring Metrics to Understand

When you are troubleshooting or when you have a life environment. It is important that your environment is performing well. We would say “Measuring is Knowing”. But what help is it to have a wonderful measuring/monitoring tool if you don’t understand what those figures actually mean. Below I list some of the more important and interesting metrics when it comes to a well performing Virtual Desktop:

User Experience

These are 2 Citrix metrics. In short:

  • ICA Latency is your network. How long does a package take to travel between your Endpoint (Citrix Workspace App) and your VDA. 
  • ICA RTT is your network + the application: The application takes it processing time to show something on the screen, this delay is added to the ICA Latency to give a number in milliseconds that a user is waiting for a return on his/her screen.

And since Windows 2019 / Windows 10 1809 there is also a Microsoft Metric:

  • User Input Delay, which is the amount of time any user input (such as mouse or keyboard usage) stays in the queue before it is picked up by a process, and the counter works in both local and remote sessions.
    • It is important to know that this will not work out of the box. You need to enable the performance counter through a registry update and a reboot.

Some very good, detailed explanations can be found:

https://www.controlup.com/controlup-automation-user-input-delay-vs-citrix-ica-round-trip-time-rtt/ 

https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/rds-rdsh-performance-counters 

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