Increase the Java virtual machine heap size using scripting
About this task
For some servers, it may be required to specify a Java virtual machine (JVM) heap size greater than the default. You can increase the heap size of the JVM using the administrative console, the wsadmin tool, or a Java client.
If you are using a JVM platform that is running on a 32-bit AIX system, perform this task if the application server, deployment manager, or node agent require a greater heap size.
- Set attributes that control the heap size for the JVM associated with the server. This can be done using the administrative console, the wsadmin tool, or a Java client.
- Perform one of the following to increase the heap size of the JVM:
- Create a script to launch the server.
Use the -script option with the command that you are using to start the target server, for example, the startServer, startManager, or startNode commands. This will generate a script for that use to launch the target server in the future.
- Manually set the environment variables before starting the target server with the startServer, startManager, or startNode commands. With the following settings, you can specify a maximum heap size for the JVM of 11 multiplied by 256 megabytesexport IBM_JVM_LDR_CNTRL_NEW_VALUE=MAXDATA=0XB0000000@DSA export LDR_CNTRL=MAXDATA=0XB0000000@DSA
For additional information on AIX address space management, view the following sources:
- IBM 32-bit SDK for AIX, Java 2 Technology Edition, V1.4 - User Guide
- Getting more memory in AIX for your Java applications
Configuring servers with scripting
IBM is a trademark of the IBM Corporation in the United States, other countries, or both.
AIX is a trademark of the IBM Corporation in the United States, other countries, or both.