Product Documentation

Use Cases: HDX Insight

May 13, 2015

HDX Insight provides end-to end visibility for ICA traffic passing through NetScaler ADC.

HDX Insight enables administrators to view real-time client and network latency metrics, historical reports, End-to-end performance data, and troubleshoot performance issues.

Availability of both real-time and historical visibility data enables NetScaler Insight Center to support a wide variety of use cases.

Identifying the root cause of slow performance issues

Scenario 1

User is experiencing delays while accessing XenApp and XenDesktop.

The delays might be due to latency on the server network, ICA traffic delays caused by the server network, or latency on the client network.

To identify the root cause of the issue, analyze the following metrics:
  • WAN Latency
  • DC Latency
  • Host Delay
To view the client metrics
  1. On the Dashboard tab, navigate to HDX Insight > Users.
  2. Scroll down and select the user name.
  3. On the Current Application Sessions table, hover the mouse over the RTT value and note the host delay, DC latency, and WAN latency values.

On the Current Application Sessions table, click the hop diagram symbol to display information about the connection between the client and the server, including latency values.

Figure 1. Current Application Sessions

Summary

In this example, the DC Latency is 1 millisecond, the WAN latency is 592 milliseconds and Host Delays is 0 seconds.

This indicates that the user is experiencing delay due to latency caused by the client network.

Scenario 2

User is experiencing delay while launching an application on XenDesktop or XenApp

The delay might be due to latency on the server network, ICA-traffic delays caused by the server network, latency on the client network, or time taken to launch an application.

To identify the root cause of the issue, analyze the following metrics:
  • WAN latency
  • DC Latency
  • Application Launch Duration
To view the user metrics
  1. On the Dashboard navigate to HDX Insight> Users.
  2. Scroll down and click on the user name.
  3. In the graphical representation, note the WAN Latency, DC Latency and RTT values for the particular session.
  4. In the Current Application Sessions table, click the first session ID.
  5. Scroll down, and in the Applications pane, from the dropdown list, select Launch Duration to view the time taken for the application to launch.


Summary

In this example, the DC Latency is 1 millisecond, the WAN latency is 13 milliseconds, and the Launch Duration value of 2.37 seconds. This indicates that the cause for the delay in launching the application is high application launch time.