HP jmeter Software for -UX manual 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