EJ-TECHNOLOGIES Jprofiler With Gold Support

Memory profiling

JProfiler's memory view section offers dynamically updated views on memory usage and allocations. All views can show live and garbage collected objects.

• Class monitor
  Shows classes and their instances. You can mark current values and show differences.
• Allocation monitor
  Shows a call tree with annotated allocations of selected classes.
• Allocation hot spots
  Shows a list of methods that allocate selected classes. You can mark current values and show differences. The tree of backtraces can be shown for each hot spot.
• Memory statistics
  Shows package statistics of objects and allocations.

Heap walker

In JProfiler's heap walker you can take a snapshot of the heap and drill down to objects of interest by performing selection steps. The heap walker has four views:

• Classes
  Shows all classes and their instances.
• Allocations
  Shows allocation tree and allocation hot spots.
• References
  Shows a graph of references for individual objects and offers a "show path to garbage collector root" functionality. Also offers cumulated views for incoming and outgoing references.
• Data
  Shows instance and class data for individual objects.

CPU profiling

JProfiler offers various ways to record the call tree to optimize for performance or detail. The thread or thread group as well as the thread status can be chosen for all views. The CPU view section contains:

• Invocation tree
  Shows a cumulated top-down tree of all recorded call sequences in the JVM.
• Hot spots
  Shows the list of the most time consuming methods. The tree of backtraces can be shown for each hot spot.
• Method graph
  Shows a graph of call sequences starting from selected methods.
• CPU statistics
  Shows package, class and method statistics.

Thread profiling

For thread profiling, JProfiler offers the following views:

• Thread history
  Shows a timeline with thread activity and thread status.
• Thread monitor
  Shows a list of all live threads with their current activity.
• Deadlock detection graph
  Shows a graph of all deadlocks in the JVM.
• Current monitor usage
  Shows the currently used monitors and their associated threads.
• Monitor usage history
  Shows the history of significant waiting and blocking events.
• Monitor usage statistics
  Shows statistics for monitors grouped by monitors, threads and classes of monitors.

VM telemetry

To observe the internal state of your JVM, JProfiler offers various telemetry views:

• Heap
  Shows a timeline with a graph of the used heap and the heap size.
• Objects
  Shows a timeline with a graph of live objects and arrays.
• Garbage collector
  Shows a timeline with a graph of garbage collector activity.
• Classes
  Shows a timeline with a graph of loaded classes.
• Threads
  Shows a timeline with a graph of active threads.

JProfiler 3.3 introduces the following notable new features:

• The eclipse 3.x integration was rewritten. The new integration now supports all standard run types in eclipse. Profiling and running your applications are now very similar.

• The IDEA 4.x integration was also rewritten. The new integration now supports all standard run types in IDEA including web applications.

• Profiling settings are now configured in the startup/connection section of the "Edit configurations" dialog.

• A new JDeveloper 10g integration was added. All types of run targets can be profiled from within JDeveloper.

• A new IDE integration for Netbeans 4.0 was added that allows you to profile standard Java projects and web projects conveniently from within Netbeans 4.0.

• In the cumulated incoming reference view of the heap walker, you can now either display the counts and sizes of the reference holders or  of the referenced objects. Also, there are now two corresponding selection steps. This makes it much easier to work with certain kinds of memory leaks.

• JProfiler can now reliably keep the VM alive so you can continue to analyze profiling data even after the application has exited.

• JProfiler now consumes a lot less memory than previous versions. This and other enhancements as well as bug fixes ensure a much better stability when profiling for e