OEM: Best Tool for Oracle Databases

Dashboard: Options to choose Home Page. Best for DBAs, best for new users and etc. I selected "best for DBAs" as my Home Page. It gives you the status (up or down) of all the databases registered. If you click each database a nice diagram shows up. On the left, you will see Load and Capacity, Incidents and Compliance, Recommendations for findings and SQL tuning, Last Backup and if there are any Jobs running.

Performance Home: Overview diagram of host average runnable processes, average active sessions, throughput, I/O, parallel execution, services. It also provides additional links to top consumers, instance locks, duplicate SQL, instance activities and SQL response time.

Top activity is another nice feature: details for 5 minute intervals. It further provides top SQL and top session. This is my go-to page for database performance tuning. You click the top SQL to get details on the "troubled" query, statistics, activities, plan and tuning history.

SQL tuning advisor is another nice feature: you can schedule a job to run the SQL tuning advisor or run it immediately.

AWR Report: when we start having DB performance issues, we run AWR a pare of snapshot reports and then compare them with a baseline report to nail down what has caused performance degradation.

Security: users, roles, profiles, auditing settings, data masking, and subsetting, data redaction, transparent data encryption, data vault, label security, virtual private database, and enterprise user security.

Scheduling jobs: we have 70 jobs running every day - backup, space, monitoring and sending alerts to email.