Which AWS feature monitors resource performance and provides health alerts?

The AWS Personal Health Dashboard is specifically designed to provide personalized alerts and guidance when AWS is experiencing events that may impact your resources. It monitors the health of your AWS services and delivers notifications and remediation guidance when AWS is experiencing events that might impact your account, such as outages, scheduled maintenance, and changes that could affect the availability of your resources. This tailored experience helps users understand the ongoing status of their resources in relation to AWS services, making it an essential feature for users who want to maintain a high level of availability and performance.

In contrast, AWS Resource Tracker focuses on tracking resource changes and configurations rather than monitoring health performance. AWS Performance Insights is a tool that helps analyze the performance of databases, but it does not provide broader health alerts for various AWS services. AWS CloudFormation, on the other hand, is a service for deploying and managing AWS resources through code, and it does not include monitoring capabilities. Therefore, the AWS Personal Health Dashboard stands out as the feature that directly addresses the need for monitoring resource performance and providing health alerts.