Which CloudWatch feature supports on-premises system-level metrics?

Custom dashboards in Amazon CloudWatch provide the capability to display a variety of metrics from different sources, including on-premises systems. When you create a custom dashboard, you can select specific metrics that you want to display, allowing for a tailored and comprehensive view of your system's performance, regardless of whether the metrics originate from AWS resources or on-premises infrastructure.

This is particularly useful for organizations that utilize hybrid architectures, where some applications are hosted in the cloud and others remain on-premises. By integrating these metrics into a custom dashboard, users can monitor system health, performance, and other critical parameters in a single view, facilitating better analysis and decision-making.

In contrast, automatic dashboards provide a predefined set of metrics without customization, event buses are primarily related to event-driven architectures rather than metric display, and X-Ray traces are specifically for analyzing and debugging applications and their performance as they interact with AWS services.