Chapter 16. Monitoring distributed systems 555
WebSphere Application Server monitoring tools rely primarily on information gathered from
two core data infrastructures:
Performance Monitoring Infrastructure (PMI), which is a collection of statistical agents
scattered through out the application server that gather statistical data on the performance
of the application server components. For more information about this topic, go to the
following website:
http://pic.dhe.ibm.com/infocenter/wasinfo/v8r5/topic/com.ibm.websphere.nd.multi
platform.doc/ae/tprf_monitoringhealth.html
Request metrics, which are primarily a set of timing agents that track a request as it
navigates the components of the application server. A key differentiation of request ...