Foglight for Citrix XenDesktop and XenApp 6.1.0

Your monitored XenDesktop environment delivers applications to end users on demand. The All Applications Summary view identifies the applications with the highest number of instances, and the highest CPU and memory utilization, and session latency. This view appears in the Quick View when you select All Applications in the Applications view on the left. Use it to look for potential bottlenecks in your system and prevent potential service disruptions by reallocating system resources where they are most needed.

Table 7. Summary - Application view
Top Instances	The applications with the highest number of running instances over the selected time range.
Top CPU Consumers	The applications consuming the highest amounts of CPU resources over the selected time range.
Top Memory Consumers	The applications consuming the highest amounts of memory resources over the selected time range.
Top Session Latency	The applications with the highest latency over the selected time range.

Investigating Application details

In your monitored environment, applications are delivered to end users on demand. You can review how individual applications are distributed to end users in the Summary - Application view. This view shows the usage of system resources for the selected Application. Use it to see the number of users that are using it, and to look more closely a individual application instances. A high number of users, for example, can lead to performance degradation, and should be investigated.

Figure 26. Summary - Application view

Table 8. Summary - Application view
Resource Utilizations	The minimum, maximum, and average values of CPU and memory utilization, network latency, and application instances, over the selected time range.
Related Items	The objects that are associated with the selected application and their alarm state.
Application Published Name	The name of the application published in your XenDesktop environment and the path to the application executable.
Executable Name
Sessions	General information about the current application sessions, such as the name of the user associated with it, client name, desktop name, additional session details, resource utilization, and latency.

Monitoring Sessions

When an end user obtains access to a virtual desktop, this results in a desktop session. A session is a specific instance of an end user’s activity. For those desktops that are monitored by NetScaler agents, you can monitor their sessions. To do that, select the Sessions tile on the XenDesktop Environment dashboard. The information appearing in the XenDesktop Session Quick View can help you discover potential resource-level issues such as high session counts, and to reallocate resources where they are most needed.


	TIP: For more information about XenDesktop Session agents, see Creating NetScaler Agent instances .

Figure 27. XenDesktop Session Quick View

To explore Sessions:

On the navigation panel, under Dashboards, click XenDesktop Environment.

On the XenDesktop Environment dashboard, on the Monitoring tab, click the Sessions tile.

In the XenDesktop Session Quick View, in the Sessions view on the left, click Session Overview.

The XenDesktop Session Quick View refreshes, showing the Summary - Session Overview view on the right.

This view identifies the virtual machines that consume the highest amounts of system resources. For more information, see Observing the Session Overview.

In the Sessions view, under Desktop Session or Application Session, click a session.

The XenDesktop Session Quick View refreshes, showing the Summary - Session view on the right.

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If NetScaler data is available, the following information appears on the Summary - Session view.

This view displays detailed information about the selected session, such as the session name and type, user logon information, and session performance details. For more information, see Investigating Session details (NetScaler data).

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If NetScaler data is not available, the following information appears on the Summary - Session view.

This view displays information about the selected session that is collected directly from the host, if you selected the Collect Session metrics when NetScaler data not available option in the XenDesktop Discovery Wizard. For more information about this view, see Investigating Session details (host data) . For more information about the XenDesktop Discovery Wizard, see Discovering XenDesktop sites .

To find out more about the NetScaler performance, in the Summary - Session view, click NetScaler.

The NetScaler Performance Detail dialog box appears.

This dialog box provides in-depth information about the NetScaler performance, such as its CPU and memory utilization, disk space usage, and network transfer rates. For more information, see NetScaler Performance Details.

Explore a session in more detail. In the top-right corner of the view, click Explore.

The display area refreshes, showing in-depth information about the selected session in the XenDesktop Explorer.

The XenDesktop Explorer can help you to better understand the state of the selected session. Use it to observe the existing resource levels and predict potential bottlenecks that may affect the performance of your monitored system. This intuitive dashboard consists of several tabs, each focusing on a specific aspect of the selected session. For more information, see Exploring individual Sessions.


	TIP: To return to the XenDesktop Environment dashboard, use the bread crumb trail in the top-left corner.


	TIP: You can also explore session details by choosing XenDesktop > XenDesktop Explorer, and then selecting a desired session in the XD Explorer tree on the navigation panel.

Observing the Session Overview

A session is a specific instance of an end user’s activity with a virtual desktop. You can view the performance of desktop or application sessions when you create and configure NetScaler agents to collect ICA (Independent Computing Architecture) session information from monitored Citrix® NetScaler® gateways using Citrix® AppFlow®. For more information about XenDesktop Session agents, see Creating NetScaler Agent instances .

To get a good understanding of which desktops or applications consume the highest amounts of system resources, use the Summary - Session Overview view. For example, high peaks in the Session Metric Chart can indicate a sudden increase in the end-users’ activity that may result in compromised performance. This view can help you discover potential resource bottlenecks, and to reallocate resources where they are most needed.

Figure 28. Summary - Session Overview

Table 9. Summary - Session Overview
Overview	Displays the session counts over the monitored time range. The Session Count line in the Session Metric Chart shows the number of all sessions. Desktop Session Count represents the number of desktop sessions, while Application Session Count is the number of application sessions, all during the monitored time range.
Top Session Count by User	Identifies the users with the highest number of sessions. Each line in the table shows the user name, the trend in the counts of sessions initiated by that end user, and the current number of sessions that user is running.
Top Sessions - ICA RTT	Identifies the ICA sessions with the highest round-trip time (RTT). Each line in the table shows the session name, its type (Desktop or Application) and its ICA RTT.
Top Sessions - WAN Latency	Identifies the sessions with the highest WAN latency. Each line in the table shows the session name, its type (Desktop or Application) and its WAN latency.
Top Sessions - WAN Transfer Rate	Identifies the sessions with the highest WAN data transfer rates. Each line in the table shows the session name, its type (Desktop or Application) and the data transfer rate over the WAN.
Top Sessions - Packets Retransmission	Identifies the sessions with the highest packet retransmission rates. Data packets are typically re-sent after being lost or damaged. High data retransmission rates are typically caused by network congestion. Each line in the table shows the session name, its type (Desktop or Application) and the data transfer rate over the WAN.