Amazon RDS Reserved Instances Offer Instance Size Flexibility
Today we’re announcing enhancements to Amazon RDS Reserved Instances (RIs) that make them more flexible and easier to use, helping you get the most out of your RI discount. RIs give you the option to reserve a database instance for a one or three year term, and in turn receive a significant discount compared to on-demand instance pricing.
Beginning with the October billing period, the discounted rate of all new and existing RDS RIs automatically applies to usage of any size in the DB instance family using the same database engine. The RI discounted rate also applies to usage of both Single-AZ and Multi-AZ configurations for the same database engine and DB instance family.
The discounted rate is automatically applied to usage, so it reduces the management overhead of trying to match RI discounts to running DB instances. Since you’re no longer tied to a specific DB instance size or Multi-AZ configuration, you can enjoy the discount even if your database needs change.
Amazon RDS Reserved Instance size flexibility is offered in all regions for the MySQL, MariaDB, PostgreSQL, and Amazon Aurora database engines, as well as the “bring your own license” (BYOL) edition of the Oracle database engine. To learn more about flexible RIs, please visit the Amazon RDS Reserved Instances Page.