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Range Navigator

The range navigator allows you to narrow the range of reported events in the recording. It is a timeline that shows all events in a recording that pertain to the data displayed on the selected tab. The events are indicated by vertical lines that vary in height, based on the number of events. A longer vertical line indicates that more events have occurred at that point in the recording. As fewer events happen, the vertical lines will have more space between them. If no events occurred, no lines appear.

Unlike other tabs, the range navigator in this tab displays garbage collection (GC) events. This is done because a GC event can move the lock instance to a new address, and JFR will consider it to be a different lock instance. To make sure that you do not get multiple representations of the same lock instance, line up the range navigator between consecutive GC events.