Using the IBM Monitoring
and Diagnostic Tools for Java -
Health Center
The IBM® Monitoring
and Diagnostic Tools for Java™ -
Health Center is a diagnostic tool for monitoring the status of a
running Java Virtual Machine
(JVM).
Introduction
The IBM Monitoring
and Diagnostic Tools for Java -
Health Center is a diagnostic tool for monitoring the status of a
running Java Virtual Machine
(JVM). The Heath Center uses a small amount of processor time and
memory, and can open some log and trace files for analysis.
Platform requirements
The Health Center client and Health Center agent have unique
platform requirements. The functionality available with the agent
depends on the level of Java Runtime
Environment (JRE) you are using.
I/O perspective
This perspective provides information about I/O activities
performed by the target Java Virtual
Machine (JVM).
Locking perspective
Review lock usage and identify possible points of contention.
Native memory perspective
The native memory perspective provides information about
the native memory usage of the process and system being monitored.
Profiling perspective
Understanding the work performed by a Java application helps you to tune performance
and to diagnose functional issues.
WebSphere Real Time perspective
Unusual or exceptional aspects of application performance
might be indicated by "outliers". This perspective helps you
identify and analyze trace information about events that might appear
inconsistent with expected application behavior.
Troubleshooting
Troubleshooting information for some common problems. One
method of debugging involves looking in the log files, and this information
explains how to do that.
Resetting displayed data
To assess the performance affect or attributes of a particular
function in the program that you are monitoring, use the Health Center
to remove all currently analyzed data from the views.
Cropping data
You can change the time period for which data is displayed
and on which recommendations are based.
Controlling the units
The units displayed by the Health Center can be modified in graphs, tables and recommendations.
Filtering
Use regular expressions to filter the information displayed
in views.
Performance hints
The Health Center agent has little effect on performance.
You can improve the performance of the Health Center agent in several
ways.