HP UX Java Software 4 Monitoring Applications, 5 Profiling Applications, 5 Profiling Applications, 4 Monitoring Applications

4 Monitoring Applications ............................................................................................	36
Controlling Data Collection and Display.............................................................................................	36
Setting Data Collection Preferences......................................................................................................	36
Managing Node Agents........................................................................................................................	37
Managing Node Agents On HP-UX................................................................................................	37
Running Node Agent as a Daemon...........................................................................................	37
Verifying HP-UX Daemon is Running.......................................................................................	37
Starting Node Agents Manually................................................................................................	37
Stopping Node Agents...............................................................................................................	38
Node Agent Access Restrictions......................................................................................................	38
Running Multiple Node Agents......................................................................................................	38
Saving Monitoring Metrics Information...............................................................................................	38
Saving Data from the Console.........................................................................................................	39
Naming Monitoring Data Files.............................................................................................................	39
Diagnosing Errors When Monitoring Running Applications..............................................................	39
Identifying Unexpected CPU Usage by Method.............................................................................	39
Viewing the Application Load........................................................................................................	40
Checking for Long Garbage Collection Pauses...............................................................................	40
Checking for Application Paging Problems....................................................................................	40
Identifying Excessive Calls to System.gc()......................................................................................	41
Reviewing the Percentage of Time Spent in Garbage Collection....................................................	41
Checking for Proper Heap Sizing....................................................................................................	43
Confirming Java Memory Leaks......................................................................................................	43
Determining the Severity of a Memory Leak..................................................................................	43
Identifying Excessive Object Allocation..........................................................................................	44
Identifying the Site of Excessive Object Allocation.........................................................................	44
Identifying Abnormal Thread Termination....................................................................................	44
Identifying Multiple Short-lived Threads.......................................................................................	44
Identifying Excessive Lock Contention...........................................................................................	45
Identifying Deadlocked Threads.....................................................................................................	45
Identifying Excessive Thread Creation...........................................................................................	45
Identifying Excessive Method Compilation....................................................................................	46
Identifying Too Many Classes Loaded............................................................................................	47
Using the JMX Viewer...........................................................................................................................	47
Understanding the JMX Summary View.........................................................................................	48
JMX Summary Tab.....................................................................................................................	48
JMX Memory Tab.......................................................................................................................	49
JMX Threads Tab........................................................................................................................	51
JMX Runtime Tab.......................................................................................................................	52
JMX Notifications Tab................................................................................................................	52
Changing Mbean Values and Monitoring the Result......................................................................	52
Using the Functions in the JMX Server View..................................................................................	53
The MBean Filter........................................................................................................................	53
The MBean Attribute Tab...........................................................................................................	54
The MBean Operations Tab........................................................................................................	55
The MBean Notifications Tab.....................................................................................................	56
The MBean Information Tab......................................................................................................	56
5 Profiling Applications .................................................................................................	58
Profiling Overview................................................................................................................................	58
Tracing.............................................................................................................................................	59
Sampling..........................................................................................................................................	59
Tuning Performance........................................................................................................................	59
Preparing a Benchmark........................................................................................................................	60
Collecting Profile Data..........................................................................................................................	61

4Table of Contents