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You may receive an error "Out of Memory" because of the desktop heap limitation
Trong bài viết này
Sửa lỗi màn hình đen khi chơi đột kích, CF

You may receive an error "Out of Memory" because of the desktop heap limitation

Bài viết
02/23/2023

Trong bài viết này

This article helps fix an "Out of Memory" error that occurs when you open many application windows in Windows.

Applies to: Windows 7 Service Pack 1, Windows Server 2012 R2 Original KB number: 947246

Symptoms

After you open many application windows in Windows, you may be unable to open any additional windows. A window may open sometimes, but it won't contain the expected components. Additionally, you receive an error message that resembles:

Out of Memory

Cause

This problem occurs because of the desktop heap limitation. When you close some windows, and then try to open other windows, these windows may open. However, this method doesn't affect the desktop heap limitation.

Resolution

Important

This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, see How to back up and restore the registry in Windows.

To resolve this problem, modify the desktop heap size by following these steps:

Click Start, type regedit in the Start Search box, and then select regedit.exe in the Programs list. Note If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
Locate and then select the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\SubSystems registry subkey.
Right-click the Windows entry, and then select Modify.
In the Value data section of the Edit String dialog box, locate the SharedSection entry, and then increase the second value and the third value for this entry.
Note
- The second value of the SharedSection registry entry is the size of the desktop heap for each desktop that is associated with an interactive window station. The heap is required for each desktop that is created in the interactive window station (WinSta0). The value is in kilobytes (KB).
- The third SharedSection value is the size of the desktop heap for each desktop that is associated with a non-interactive window station. The value is in kilobytes (KB).
- We don't recommend that you set a value that is over 20480 KB for the second SharedSection value.

By default, the Windows registry entry contains the following data in an x86-based version of Windows 7 Service Pack 1.

%SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024, 12288,512 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ProfileControl=Off MaxRequestThreads=16

Windows 7 Service Pack 1 (64 bit) / Windows Server 2008 R2, 2012 R2 (64 bit)

SharedSection=1024, 20480,768

Memory allocations are dynamic in later operating systems. There's no limitation for memory allocation. However, if you allocate too much memory to the desktop heap, negative performance may occur. It's why we don't recommend that you set a value that is over 20480.

Note

The desktop heap size isn't affected by the physical RAM on the computer. You can't improve the performance by adding physical RAM.

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