HPjmeter 4.2 User's Guide

Reset Interval to Default Settings Across All Metrics.........................................................184
Changing Time Interval in Monitoring Visualizers.................................................................184
Change Color Selection for Histogram Display..................................................................................185
9 Understanding How HPjmeter Works ....................................................................187
Performance Overhead on Running Applications..............................................................................187
Application Server Startup Time...................................................................................................187
Monitoring Overhead....................................................................................................................187
Changes in Memory Overhead With Dynamic Attach............................................................187
Profiling Overhead and Intrusion.................................................................................................187
Node Agent Overhead...................................................................................................................187
Console Overhead..........................................................................................................................188
Data Sampling Considerations...........................................................................................................188
Using Confidence Interval to Indicate Sample Validity................................................................188
How Memory Leak Detection Works.................................................................................................189
Tapping in to Standard Management of the Java Virtual Machine....................................................190
10 Troubleshooting ......................................................................................................192
Documentation and Support..............................................................................................................192
Identifying Version Numbers.............................................................................................................192
Installation...........................................................................................................................................192
Console ...............................................................................................................................................193
JVM agent............................................................................................................................................194
Node agent..........................................................................................................................................195
Zero Preparation Profiling..................................................................................................................195
Unexpected Behavior in Visualizers...................................................................................................196
A Quick References.......................................................................................................197
Connecting to the HPjmeter Node Agent...........................................................................................197
Determining Which HPjmeter Features Are Available With a Specific JVM Version........................197
Default Location of Xverbosegc and Allocation Site Statistics Data Files..........................................198
Glossary ........................................................................................................................199
Index...............................................................................................................................202
Table of Contents 9