Which service is used to monitor CPU utilization in EC2 instances?

Amazon CloudWatch is the correct choice for monitoring CPU utilization in EC2 instances. It is a monitoring and observability service that provides a reliable way to monitor the performance of resources running on AWS, including EC2 instances.

With CloudWatch, you can collect and track metrics, collect log files, and set alarms. For CPU utilization specifically, CloudWatch provides real-time monitoring, allowing you to see how much CPU time is being used by your EC2 instances. It can also alert you if the CPU usage goes beyond a predefined threshold, enabling you to take action if necessary.

This service is central for maintaining the health and performance of your applications running on AWS, as it gives you insights that are crucial for scaling and optimizing your resources. By using CloudWatch, you ensure that your EC2 instances are operating within expected performance parameters and can proactively manage resource utilization.