AWS Trusted Advisor

AWS Trusted Advisor is an online resource to help you reduce cost, increase performance, and improve security by optimizing your AWS environment. AWS Trusted Advisor provides real-time guidance to help you provision your resources following AWS best practices. To help you maximize utilization of Reserved Instances, AWS Trusted Advisor checks your Amazon EC2 computing-consumption history and calculates an optimal number of Partial Upfront Reserved Instances. Recommendations are based on the previous calendar month's hour-by-hour usage aggregated across all consolidated billing accounts. Note that Trusted Advisor does not provide size-flexible Reserved Instance recommendations.

For more information about how the recommendation is calculated, see Reserved Instance Optimization Check Questions in the Trusted Advisor FAQs.