Without having to enable Server Visibility, you can view basic machine metrics in these locations:

• Metric Browser – Go to Application Infrastructure Performance > Hardware Resources.
• Node page > Server tab – Go to Tiers & Nodes, select the node of interest, and go to the Server tab.
• Custom Dashboards – To add CPU metrics to your Custom Dashboard, add the metrics for any node on your target machine. Metrics collected for a node associated with the machine agent are for the server hosting that node. Any machine metrics collected will be the same for nodes that are on the same machine.

Server Visibility provides additional metrics and pages to view basic and server metrics. See Monitor Your Servers Using Server Visibility.

Hardware Resources Metrics describes metrics collected by the Machine Agent.

Customize Default Metrics

You can enable collection of metrics for virtual disks and external network traffic.

Add Custom Metrics

You can add script-based and Java-based custom monitoring extensions to collect additional metrics. For example, the ehCache monitoring extension available from Product Exchange can collect metrics to monitor Ehcache performance. The metrics appear in Application Infrastructure Performance | Custom Metrics section of the Metric Browser and which you can use on custom dashboards.

You can also send metrics to the Machine Agent using the HTTP listener.  See Extensions and Custom Metrics.