Secure API Manager provides the ability to send an email when a node in the Database Service cluster is down for longer than five minutes. The system still runs and everyone can still access the APIs and create APIs if a node in the Database Service cluster is down but eventually you can lose data. You should not run with one node down for an extended period of time.
Secure API Manager provides an SQL file that you configure for your environment to have the Database Service cluster send an email notification. You access the SQL file in the Customer Center. For more information, see the Enabling Email Notifications for Secure API Manager 1.1 Technical Reference.