The Tracer shows the SOAP messages, the respective SOAP message requests and responses - when the services are deployed on the server, and the invoked operations. By default, this feature is turned off. You have to turn it on to enable tracing.
Warning: Turning on the Tracer feature will have a drag on the performance. This is because all the SOAP messages will always be completely built (i.e., deferred building will not be done) and stored in the database by WSO2 Data Services. Hence this option should be used with caution.
Figure 1: Turned OFF SOAP Tracer
Figure 2: SOAP Tracer- Request/Response Messages