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Check with windows Desktop Heap Memory size

The Desktop Heap Monitor is a tool that examines usage of desktop heap.

WIN32 subsystem has internal heap area known as "desktop heap." When you run a large number of Windows-based programs, "Out Of Memory" error messages appear when you attempt to start new programs or try to use programs that are already running, even though you still have plenty of physical and pagefile memory available.

This behavior can occur if the desktop heap in the WIN32 subsystem is depleted (see KB#126962).

By using the Desktop Heap Monitor, you can examine how much desktop heap is consumed without interrupting the running system.


Sample output of Desktop heap memory tool: (When problem occured. You can check that Used Rate % is 98.8 for Service-0x0-3e7$\Default)

Desktop Heap Information Monitor Tool (Version 8.1.2925.0)
Copyright (c) Microsoft Corporation. All rights reserved.
Session ID: 0 Total Desktop: ( 5312 KB - 7 desktops)

WinStation\Desktop Heap Size(KB) Used Rate(%)
WinSta0\Default 3072 16.1
WinSta0\Disconnect 64 4.5
WinSta0\Winlogon 128 8.9
Service-0x0-3e7$\Default 512 98.8
Service-0x0-3e4$\Default 512 4.3
Service-0x0-3e5$\Default 512 4.3
SAWinSta\SADesktop 512 0.5

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