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Understanding the Java heap vs. the native C heap (Doc ID 1355284.1)

Last updated on MAY 26, 2018

Applies to:

Java SE JDK and JRE - Version 1.4.2 and later
Information in this document applies to any platform.

Purpose

A Java process basically consists of two different heap spaces.


The above is often confusing when it comes to OutOfMemory errors and allocation failures.
In particular in 32-bit mode where the overall process space is limited to 4gb or even 2gb depending on the OS.


Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps
References

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