HP jmeter Software for -UX manual Analyzing Garbage Collection Data

Profiling with -Xeprof	61
Profiling with Zero Preparation	62
Profiling with -agentlib:hprof	63
Naming Profile Data Files	65
–Xeprof and –agentlib:hprof Profiling Options and Their Corresponding Metrics	65
Approaches to Analyzing Performance Data	68
Looking at the Data from the Bottom Up	68
Looking at the Data from the Top Down	68
Looking for Inefficiencies in Memory Usage	68
Considerations in Interpreting the Data	68
Inclusive Versus Exclusive Time	69
Time Units	69
CPU Versus Clock Time	69
Locating Summary Information for Saved Data Sets	69
Adjusting Scope	70
Comparing Profiling Data Files	71
Scaling Comparison Data	72
Reading Profiling Histograms	73
Key to Thread States Reported by	73
Interpreting the Histogram Presentation	74
Using Call Graph Trees	75
Interpreting Call Graph Data	75
Example of Node Color Display	76
Options for Manipulating the Call Tree Display	77
Tree Pruning	77
Auto-Expanding the Call Tree	77
Using Sub-Trees	77
Searching the Trees	78
Using Heuristics to Locate Possible Hot Spots	78
6 Analyzing Garbage Collection Data	80
Obtaining Garbage Collection Data	80
Data Collection with -Xverbosegc	80
Collecting Allocation Site Statistics for Viewing in HPjmeter	83
Collecting Glance Data for Viewing in HPjmeter	83
Collecting GC Data with Zero Preparation	83
Data Collection with -Xloggc	84
Naming GC Data Files	85
-Xverbosegc and -Xloggc Options and Their Corresponding Metrics	85
Locating Summary Information for Saved Data Sets	86
Comparing Garbage Collection Data Files	86
Basic Garbage Collection Concepts	87
Key to Garbage Collection Types Recognized by HPjmeter	87
Understanding the Summary Presentation of GC Data	88
Understanding the System Details Captured with GC Data	90
7 Using the Console	93
Starting the Console	93
Starting the Console On HP-UX	93
Starting the Console On Linux	93
Starting the Console On Microsoft Windows	93
Using the Main Window Functions	93
Data Representation	94
Icons and Their Meaning	95
Node Agent	95
JVM Agent	95

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