Tune heap to accomodate large objects | PMI predefined statistics

17.6.1 Performance Monitoring Infrastructure (PMI)

The Performance Monitoring Infrastructure provides a set of APIs to obtain performance data for system resources, WebSphere Application Server queues, and actual customer application code.

PMI uses a client-server architecture. The server collects performance data in memory within the WebSphere Application Server. This data consists of counters such as servlet response time and data connection pool usage. A client can then retrieve that data using a Web client, a Java client, or a JMX client.

A client is an application that retrieves performance data from one or more servers and processes the data. Clients can include:

• GUIs that display performance data in real time.

• Applications that monitor performance data and trigger different events according to the current values of the data.

• Any other application that needs to receive and process performance data.

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