HPjmeter 4.3 User's Guide

Figure 61 GC Metric: Heap Usage After GC
Related Topics
• Using Visualizer Tool Bars (page 201)
• Changing Time Interval in GC Data Visualizers (page 206)
• Basic Garbage Collection Concepts (page 103)
• Current Live Heap Objects (page 147) (available in monitoring mode)
• Heap Usage Alert (page 129) (available in monitoring mode)
Duration (Stop the World)
This visualizer shows the amount of stop-the-world time spent for each garbage collection event.
A well-tuned application shows a relatively large number of short scavenges with less frequent,
but more expensive, full garbage collections.
This graph is also useful for exposing the cost of explicit System.gc() method calls within an
application, which often result in expensive and unneeded garbage collection overhead.
182 Using Visualizer Functions