Hi Guenter,
unfortunatelly, if we enable any PMI metric in WAS (i.e. ConcurrentRequests for webapp pmi module as it is described in the link you attached), then APM automatically displays this metric (ConcurrentRequests) not just for the main webapp module (*.war), but each submodule (servlets) under the main webapp module. and in our case it means +3000 metrics/application server so around 300 000 useless metrics in APM because the technicians need/follow just the main webapp metrics during app performance tests/investigation.
thank you,
stefan