WLSDM can store WebLogic domains JMX MBean metric data (OpenSocketsCurrentCount, ActiveConnectionsCurrentCount... etc.), Back-end data (Long running JDBC SQLs, EJB, JAXWS, Socket I/O, File I/O... etc.) historically.
It is very easy to see old alarms and data and analyze the root cause. For this feature,
WLSDM does not require any 3rd party database requirement or additional server, operational costs.