Prometheus is known for which primary function?

Prometheus is primarily recognized for its function in event monitoring and alerting, especially within cloud-native and microservices architectures. It is a powerful open-source systems monitoring and alerting toolkit that is particularly effective in gathering and processing metrics in real time. Its design allows it to scrape and store metrics data in a time-series format efficiently.

Prometheus excels in generating alerts based on time-series data through its alerting rules, which is crucial for maintaining the reliability and performance of applications and infrastructure. This capability to monitor events and detect anomalies makes it an essential tool in DevOps practices and infrastructure management.

The other options, while related to various aspects of monitoring and health management, do not align with the main features and capabilities of Prometheus, which specializes in metrics collection and alerting functionalities.