My Oracle Support Banner

How to Debug Java Garbage Collection on OC4J (Doc ID 342799.1)

Last updated on APRIL 12, 2021

Applies to:

Oracle Containers for J2EE - Version 10.1.2.0.0 and later
Information in this document applies to any platform.

Purpose

This article is intended to be used in debugging Java apps Memory Consumption Issues by enabling Verbose Garbage Collection.

The verbosity option depends on the Platform and JDK Version where the Java Process is running.

In this guide a free software will be used in order to get a graphical view of the Garbage Collection.

The software is called gcviewer and can be found at :

http://www.tagtraum.com/gcviewer-download.html 

GCViewer

After you downloaded and unpacked the archive you can start GCViewer by simply double-clicking on gcviewer-1.2x.jar or running java -jar gcviewer-1.2x.jar

You will have to set the DISPLAY Env correctly as it' s a GUI tool is case you' re doing that on a Unix box remotely )

Date Binary GZIP TAR Binary ZIP
3.1.08 gcviewer-1.27-bin.tar.gz [1.465.858bytes] gcviewer-1.27-bin.zip [1.465.513bytes]
Date Source GZIP TAR Source ZIP
26.10.06 gcviewer-1.27-src.tar.gz [2.431.350bytes] gcviewer-1.27-src.zip [2.502.985bytes]

Troubleshooting Steps

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Purpose
 GCViewer
Troubleshooting Steps
 Other GC related Tools and Links
References

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.