Policies for Connector Virtual Services
Each default connector virtual service has a default policy, which logs the requests/responses and their payloads to a database. You cannot modify the default connector virtual services or their policies. However, you can create additional connector virtual services with custom policies.
If you create a connector virtual service with a custom policy, you can include the actions from the Monitoring and Additional categories (except for Validate Schema); the WS-SecurityPolicy 1.2 actions are not needed. For example, you might want to create a custom policy that monitors run-time performance, customizes how the service invocations are logged, or optimizes server traffic.