Unusual or exceptional aspects of application performance
might be indicated by "outliers". This perspective helps you
identify and analyze trace information about events that might appear
inconsistent with expected application behavior.
Health Center gives you the tools required to:
- Identify outlier events.
- Filter trace information to highlight outlier events.
- Present outlier information in a timeline or histogram view.
The WebSphere® Real
Time perspective within Health Center enables you to answer questions
about application performance, such as:
- During an application run, how often did a specific operation
complete on schedule?
- Did any instance of the operation take a different amount of time
to complete, in comparison to other instances?
- What are the maximum, minimum, and mean times required to complete
an operation?
- What is the key factor - the "determinism factor" - affecting
the performance of the operation?
When Health Center detects that you are connecting to a WebSphere Real Time application,
the perspective is enabled automatically. If you attempt to use the
perspective while not connected to a WebSphere Real Time application, a warning
message is displayed in the status bar, or the appropriate view window.
If no data is available for a view, a message reports the problem
in the window. Common causes of data not being available include:
- The selected trace event is not enabled on the target application.
- No target events occurred while the trace was running.