15.2 Overview of the trace based performance analysis of Application Server
The redirector and the Web container that output the trace are referred to as the function layer. In the trace based performance analysis, trace information is output at the entrance and the exit of the following function layer. Moreover, the trace information is output as and when necessary for each process that affects the performance among the processes of the function layers. The following table shows the application execution environments and the applicable function layers that differ in V9 compatibility mode and in recommended mode.
|
Function layer |
Execution environment of the application |
|
|---|---|---|
|
Execution environment of the J2EE application |
Execution environment of batch applications |
|
|
Redirector |
Y |
-- |
|
Cosminexus JPA Provider |
Y |
-- |
- Legend:
-
Y: Applicable
--: Not applicable
- Reference note
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Key information (route application information) is added to the PRF trace. For a J2EE application, information acquired by the redirector or EJB client is added.
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When a timeout occurs during the transaction of the J2EE application or in the redirector in receiving the response, you can use the root application information that is output in the trace based performance analysis to identify the transaction and the request that timed out.
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