How do I monitor?

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Performance Monitoring Infrastructure (PMI) needs to be enabled (by default PMI is enabled out-of-the-box) before collecting any performance data. PMI should be enabled before the server starts. If PMI is enabled after the server is started, the server needs to be restarted to start the PMI. When PMI service is enabled, the monitoring of individual components can be enabled or disabled dynamically. PMI provides four predefined statistic sets that can be used to enable a set of statistics. If the predefined statistic sets does not meet your monitoring requirement, the Custom option can be used to selectively enable or disable individual statistics.Enable PMI using the administrative console

The Tivoli Performance Viewer (TPV) enables administrators and programmers to monitor the overall health of WebSphere Application Server without leaving the administrative console.Monitor performance with Tivoli Performance Viewer

Request metrics is a tool that allows you to track individual transactions, recording the processing time in each of the major WebSphere Application Server components. The information tracked might either be saved to log files for later retrieval and analysis, be sent to Application Response Measurement (ARM) agents, or both.Use request metrics to measure application flow