Enable Application Response Measurement

Application Response Measurement (ARM) is an Open Group standard composed of a set of interfaces. An ARM agent implements these interfaces to provide information on elapsed time for process hops.

Before you enable Application Response Measurement (ARM), install a supported ARM implementation on all WebSphere Application Server nodes. WebSphere Application Server does not provide an ARM implementation. Verify with your ARM agent provider that Request Metrics is supported by the ARM agent implementation. ARM support is dependent on Request Metrics support.

Note: Request Metrics in the Web server plug-in is not integrated with ARM in WebSphere Application Server Version 5.0.x. If ARM is enabled, Request Metrics in the Web server plug-in ignores it.

1. Install the ARM implementation. Add this line to the startup command for the application servers:

   -Dcom.ibm.websphere.pmi.reqmetrics.ARMIMPL=ARMIMPLNAME

   WebSphere Application Server support of ARM is dependent on Request Metrics support. If enabled, and an appropriate ARM implementation is defined to the server run times, then the ARM implementation is called as requests enter WebSphere Application Server processes and when Java Database Connectivity (JDBC) calls are made, using EJB 2.0 data sources.

2. Start the administrative console.

3. Expand Troubleshooting and click PMI Request Metrics.

4. On the Performance Monitoring Request Metrics page, select the enableARM check box.

5. Save the configuration.

6. Restart the application server.