Amazon RDS for Oracle now supports the Oracle Enterprise Manager (OEM) Cloud Control

You can now use the Oracle Enterprise Manager (OEM) Cloud Control to manage multiple Amazon RDS for Oracle database instances. The OEM Cloud Control offers a solution that allows you to monitor and manage the complete Oracle IT infrastructure from a single console. Amazon RDS for Oracle installs the Oracle Management Agent (OMA) which communicates with your Oracle Management Service (OMS) to provide monitoring information.
Quelle: aws.amazon.com