HPjmeter 4.3 User's Guide

The integer is a count of how many times this exception has been thrown in this location, and

caught by this method. The percentage gives information on how often this exception is being

thrown in relation to all the detected thrown exceptions.

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 138) metric, which does not

collect stack traces, when you start your session.

Figure 38 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.