Amazon RDS for Oracle now supports Oracle Management Agent (OMA) version 13.5 for Oracle Enterprise Manager (OEM) Cloud Control 13c Release 5. OEM 13c offers web-based tools to monitor and manage your Oracle databases. Amazon RDS for Oracle installs OMA, which then communicates with your Oracle Management Service (OMS) to provide monitoring information. Customers running OMS 13.5 can now manage databases by installing OMA 13.5.
Source:: Amazon AWS