HPjmeter 4.2 User's Guide

NOTE: Collecting the stack trace information could impair the performance of your application

if the application throws a large number of exceptions during the session. To minimize the effect

on your application, you can enable the Thrown Exceptions (page 120) metric, which does not

collect stack traces, when you start your session.

Figure 8-4 Monitoring Metric: Thrown Exceptions with Stack Traces

HPjmeter collects and reports exceptions caught in classes that are instrumented, that is, classes

that the JVM agent instrumentation rules have not excluded. To identify the JVM agent rules in

effect, you can use the JVM agent verbose option.

HPjmeter does not collect or report exceptions that are caught in methods filtered out by the

exclude JVM agent option.

The display shows “No thrown exception detected since the session opened.” until HPjmeter

detects a thrown exception at which time it displays the information.

The window shows events in a hierarchical tree.

The View menu allows you to control the information displayed in the window:

• Select View→Show Percentages to alternatively hide or show the percentage value of the

total count for each exception, shown next to the count value.

• Select View→Show Packages to alternatively hide or show the Java package names to

shorten the lines in the display.

• Select View→Show Stacktraces alternatively expand or collapse the throw location stack

traces of all the exception nodes, or click on a specific node to expand or collapse its throw

location stack trace only.

The results are cumulative over the lifetime of the session.