Before you begin
The Harvester component of the WebLogic Diagnostic Framework provides the means for gathering metrics that report the state of attributes on qualified MBeans that are instantiated in a running server. The Harvester can collect metrics from Weblogic Server MBeans and customer MBeans, to reflect the running environment.
Metrics are configured and collected in the scope of a diagnostic system module targeted to one or more server instances. Therefore, to collect metrics, you must first create a diagnostic system module. Then, you can configure metrics in that module and target the module to one or more server instances.
To configure metric collection for a diagnostic system module: