Apache Tomcat: mandatory component. Servlet container and web server which hosts MySQL Enterprise Service Manager.

Java Runtime Environment (JRE): mandatory component. Required by Tomcat.

MySQL Server: optional component. Used to store the data from the monitored hosts and instances. Referred to, throughout this document, as the repository. It is also possible to use another MySQL instance as the repository. For more information, see Section 4.2.4, “MySQL Enterprise Monitor Repository”.