For a deep dive into the best practices for monitoring in Enterprise Manager, please refer to this document (PDF).
Refer to this document for information on Enterprise Manager monitoring enhancements by release updates.
Refer to this document.
Refer to the following:
Management connectors are bundled with various packs. Licensing is determined by the type of target that will have events shared or tickets opened for it in the third-party system. For example, If you open ServiceNow tickets for Oracle Database targets, then you will need to license the Oracle Diagnostics Pack. If you open ServiceNow tickets for WebLogic Server targets, then you will need to license the WebLogic Server Management Pack Enterprise Edition.
Refer to this document for a list of all the event and ticketing connectors available in Enterprise Manager.
To monitor Oracle Database in Enterprise Manager, you will need to purchase licensing for the Oracle Diagnostics Pack.
Oracle Enterprise Manager for MySQL is included with MySQL Enterprise Edition and MySQL Cluster Carrier Grade Edition at no additional cost. To use Oracle Enterprise Manager for MySQL with MySQL Community Edition, you must purchase licensing for MySQL Enterprise Edition or MySQL Cluster Carrier Grade Edition.
Microsoft SQL Server and IBM DB2 are licensed with the System Monitoring Plugins for Non-Oracle Databases.