The Application Sunburst widget is used to identify poor performing applications.

It shows application activity and performance impact for the selected location in a sunburst.

When you select a location, the widget shows the applications in a sunburst presentation indicating "if" and "how much" an application is affected with different colors. The sunburst provides an intuitive way of determining if only a single application in the location is affected or if all applications are affected.

The user can identify where the problem lies within the organization by looking at affected application(s) in the selected time frame. You can expand or collapse the root node of the tree as well as children nodes in order to identify the specific application.

The sunburst presentation is based on the activity for the selected location. The size of the Applications in each ring is determined by the number of computers accessing the application, known as 'online computers'. The applications are colored based on how many computers experience degraded performance on the application. Default values for the colors are:

• Green: Less than 10% of the online computers are affected
• Yellow: 10-20% of the online computers are affected
• Orange: 20-30% of the online computers are affected
• Red: More than 30% of the online computers are affected

You can view the number of affected applications and impact details such as how big the threshold violation was by placing your cursor over a specific application.

Set Up the Widget

It's your PerformanceGuard administrator who sets up the thresholds that define how many affected computers it takes before the nodes change color.

You have to define an application before you can set up the widget. PerformanceGuard automatically creates an Application Online event when an application has been created.

Technically, your administrator sets up PerformanceGuard applications to define this.

• Your PerformanceGuard administrator has predefined Event rules i.e. select ADMINISTRATION > Event Management > Event Rules (or create a new Event Rule).
  • For Client/Server applications:
    • Response Time, Availability, TCP Retransmissions, Average RTT and Protocol Response Time
• For Web applications:
  • Response Time and Availability

PerformanceGuard comes with a number of built-in event rules, so your administrator doesn't necessarily have to set up event rules of his own.

Select what You Want to View

Your PerformanceGuard administrator has typically set up the widget to view the affected applications.
When that's the case, you can simply use the Applications menus in the top part of the dashboard to view the number of affected computers for selected Time Period.