Starting today, you can use the Reserved Instance (RI) Coverage report in AWS Cost Explorer to better understand and manage your Amazon RDS, Amazon Redshift, and Amazon ElastiCache reservations, in addition to your Amazon EC2 RIs. The RI Coverage report allows you to visualize the percentage of running instance hours that are covered by RIs against a user-defined coverage threshold and over a timeline that you define. You can view RI coverage at a high level (e.g., across all running hours) or dive into a detailed view by filtering on account, instance type, region, tags, and more. You can also access additional coverage-related information such as the number of On-Demand hours used, the node type, and the region in which it was used. From there, you can use this information to optimize your RI purchasing strategy (e.g., by identifying instance hours that are consistently running at on-demand rates and purchase matching RIs).
