HPjmeter 4.2 User's Guide

Figure 8-7 Monitoring Metric: Percentage of Time Spent in Garbage Collection
Related Topics
• Checking for Proper Heap Sizing (page 43)
• Reviewing the Percentage of Time Spent in Garbage Collection (page 41)
• Allocated Object Statistics by Class (page 127)
• Allocating Method Statistics (page 128)
• Identifying Excessive Object Allocation (page 44)
Unfinalized Objects
Shows a measure of the objects that have not been finalized at each garbage collection during
the monitoring period.
Guidelines
• Escalating numbers of unfinalized objects can indicate that the finalizer queue is growing,
with associated objects holding increasing space in the heap.
Details
• Some or many of the objects in a finalizer queue may no longer be needed by the program
and are waiting to be finalized and then collected.
• Check to see if the finalize () method in your application is being called at appropriate
times and frequency.
• Profiling with –Xeprof will help you to obtain details about the number of unused finalizers
in the heap.
• Use the monitoring or profiling thread histogram to check the state of the finalizer thread
during the recorded period.
126 Using Visualizer Functions