Service administrators can configure rules to generate alerts when metrics exceed or are under specified thresholds for a specific time period. Service administrators will receive the alert notifications. See Setting an Alert for a Performance Metric of Managing and Monitoring Oracle Cloud.
To monitor and manage the Oracle database deployed on Oracle Database Cloud Service, you can use the standard management tool provided with the version of the database. See Monitoring and Managing Oracle Database on Database Cloud Service of Administering Oracle Database Cloud Service.