Component performance metrics can be collected in memory during the completion of particular events. These metrics are kept only in memory so there are several mechanisms to extract and display them including (but not limited to) Oracle Enterprise Manager Fusion Middleware Control (FMW), the Oracle Dynamic Monitoring Service (DMS) and the Oracle Process Manager and Notification Server (OPMN).
FMW Control is a Web browser-based, graphical user interface that offers monitoring options. See Monitoring Performance and Logs with Fusion Middleware Control for details.
DMS uses the DMS Spy Servlet to provide access to DMS metric data from a web browser. Information is categorized by Noun Types; for Oracle Access Management the prefix is OAMS.OAM_. See Monitoring Metrics Using the DMS Console.
dmsdump is provided by DMS to take metrics from the servers based on definitions in a dms configuration file. There are many OAM metrics exposed when dms dumps are generated. See the Oracle Fusion Middleware Performance and Tuning Guide for more details.
OPMN provides access to metrics using dmsdump. See the Oracle Fusion Middleware Performance and Tuning Guide for more details.