Final answer:
Amazon CloudWatch can help collect important metrics from Amazon RDS and Amazon EC2. It provides system-wide visibility into resource utilization, application performance, and operational health.
Step-by-step explanation:
The service that can help you collect important metrics from Amazon Relational Database Service (Amazon RDS) and Amazon Elastic Compute Cloud (Amazon EC2) instance is Amazon CloudWatch. Amazon CloudWatch offers insightful system-wide visibility into resource utilization, application performance, and operational health. It collects and tracks metrics, collects and monitors log files, and responds to system-wide performance changes. By using CloudWatch, you can gain system-wide visibility into resource utilization, application performance, and operational health.
Learn more about Amazon CloudWatch