Getting more memory in AIX for your Java applications
http://www.ibm.com/developerworks/systems/articles/aix4java1.htmlIntroduction
This article explains how 32-bit Java allocates its heap in AIX, and pertains to all the latest versions of 32-bit IBM Java available for AIX versions 4.3.3, 5.1, and 5.2.
You will learn how to distinguish between various memory areas of a Java process under AIX, and how to tweak their sizes to suit your needs. The information in this article will allow your Java-based applications to break the barrier of 1 GB Java heap with versions of Java prior to 1.4; I'll also describe how Java 1.4 does it automatically for you. For applications that use databases and middleware, this article provides the basis for advanced topics, such as segment collision avoidance.
This article has been updated to include information about Java 1.4, and also to give examples of commands you can use to increase your understanding of the topic. The fence analogy, and much of the enhanced description, were provided by Mark Bluemel. Along with Mark, Ashok Ambati and Greg Hodgins reviewed the article to make it much more readable. The update itself was triggered by feedback from readers like you; thanks to everyone who sent their comments.
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