Bug ID: JDK-6840305 Discrepancy in system memory details (when 4G or greater) reported by JVM and Windows OS

JDK-6840305 : Discrepancy in system memory details (when 4G or greater) reported by JVM and Windows OS

Type: Bug
Component: hotspot
Sub-Component: runtime
Affected Version: 5.0u16

Priority: P2
Status: Closed
Resolution: Won't Fix
OS: windows_2008
CPU: generic

Submitted: 2009-05-12
Updated: 2011-02-16
Resolved: 2009-07-14

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JDK 6	JDK 7	Other
6u16-revFixed	7Fixed	hs14.2Fixed

Customer seeing a discrepancy in system memory details shown in hs_err log and the actual memory in the win2k8 server.

Actual RAM size  :4GB  but in hs_err it is  physical 2097151k(157596k free)
Actual Virtual Memory      :8GB but in hs_err it is swap 4194303k(3189640k free)

EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-rt/hotspot/rev/8c79517a9300

17-07-2009

EVALUATION GlobalMemoryStatus() does not report correct memory usage when the system has more than 4gb of RAM. GlobalMemoryStatusEx() should be used in place of GlobalMemoryStatus().

17-06-2009