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An Explanation Of Restrictions Limiting The Java Max Heap (-Xmx) To Around 1500M For 32bit JDK's On Microsoft Windows (Doc ID 557813.1)

Last updated on JULY 01, 2021

Applies to:

Oracle Containers for J2EE - Version and later
Microsoft Windows (32-bit)


This document presents an overview of memory addressing schemes that apply to hardware platforms, such as the x86 and x86-64 architectures that typically run Microsoft Windows systems, and illustrates why by default the maximum JAVA heap that can be set for a 32bit JDK cannot be higher than about 1500M.


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