Oracle Enterprise Manager

Did you know that OEM has a built in interface for executing simple ad-hoc queries and recording the results? Here is how I set up a recurring query to find the number of user logins every 15 minutes and record the data. 1) Navigate to a database instance in OEM
2) Select the Related Links -> User Defined Metrics link from the bottom of the Database Instance Home tab.
3) Select the Create button to create a new User Defined Metric a. Enter the Metric Name