Measure data requests with PMI Request Metrics
Performance Monitoring Infrastructure (PMI) Request Metrics measures the time that it takes for requests to travel through WebSphere Application Server components. This data helps to identify run time and application problems. PMI Request Metrics measures how long a request stays at points such as the Web container, the enterprise bean container, and the database. This information is recorded in logs, and can be written to Application Response Measurement (ARM) agents used by Tivoli monitoring tools.
To record data with PMI Request Metrics, perform these steps:
(Optional) Enable Application Response Measurement.
(Optional) Configure Request Metrics trace filters. Filters specify which requests you want to trace.
(Optional) Set the trace level for Request Metrics. The trace level specifies how much information you want to collect for incoming requests.
Regenerate the Web server plugin configuration. After you modify the Request Metrics configuration, regenerate the Web server plug-in configuration file so that the Web server plug-in recognizes the changes to the Request Metrics configuration. If you make multiple changes to Request Metrics, regenerate the plug-in configuration files after you complete all changes. If you do not regenerate the plug-in configuration, the Web server plug-in might have different Request Metrics configuration data from the application server. This difference in configuration data might cause inconsistent behaviors for request metrics between the Web server plug-in and the application server.
See this topic for information about the trace output file:
Request Metrics data output
This topic describes the format of the Request Metrics trace output.