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Why JConsole and JMap Reports Different Max Heap Size (Doc ID 2522936.1)

Last updated on JANUARY 05, 2023

Applies to:

Java SE JDK and JRE - Version 7 and later
Information in this document applies to any platform.

Goal

A WebLogic Server instance is launched with "-Xms3712m -Xmx3712m" for the max heap size.
The JConsole output reports "Maximum heap size" reports 3597mb" while JMap command reports MaxHeapSize = 3892314112 (3712.0MB).
Why do JConsole and JMap report the max heap size differently?

Solution

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In this Document
Goal
Solution


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