Ensure that your AWS RDS Reserved Instances (RIs) are renewed before expiration in order to get the appropriate discount (based on the commitment term) on the hourly charge for these instances. The renewal process consists of purchasing another RDS Reserved Instance so that Amazon can keep charging you based on the chosen reservation term.
This rule can help you work with the AWS Well-Architected Framework
This rule resolution is part of the Cloud Conformity Cost Management tool for AWS
With Reserved Instances (RIs) you can optimize your Amazon RDS costs based on your expected usage. Since RDS RIs are not renewed automatically, purchasing another reserved database instances on time will guarantee that these instances will be also billed at a discounted hourly rate.
Note: You can change the default threshold (seven) for the number of days before expiration on the Cloud Conformity console and set your own value (days) based on your requirements.
To determine the expiration date of your AWS RDS Reserved Instances, perform the following:
To renew the RDS Reserved Instances before their reservation expire, you need to repurchase them using the same configuration attributes (region, instance size/class, database type/engine, etc). To renew your existing RDS RIs in order to avoid On-Demand rates charges, perform the following: