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Decreased performance, driver load failures, or system instability may occur on Hot Add Memory systems that are running Windows Server 2003
Article ID: 913568 - View products that this article applies to.
Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/256986/ )Description of the Microsoft Windows registry
You may experience any one of the following problems on a Microsoft Windows Server 2003-based computer that has the Hot Add Memory feature enabled:
When the Hot Add Memory feature is enabled, the operating system pre-allocates kernel resources to handle any future memory that may be added to the computer. Kernel resources are allocated based on the capabilities of the computer instead of on the RAM that is actually installed. The kernel may allocate significant resources to RAM that may never be installed. Therefore, the Hot Add Memory feature may cause the maximum size of the paged pool to be much smaller than expected.
The problem may be most likely to occur on a computer that is running an x86-based version of Windows Server 2003 when one of the following scenarios is true:
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To work around this problem, use one of the following methods.
Method 1: Use the DynamicMemory registry parameter to limit the amount of Hot Add MemoryTo set the DynamicMemory registry parameter on computers that run Windows Server 2003 with Service Pack 1 (SP1) or later versions, follow these steps:
Method 2: Disable the Hot Add Memory featureTo disable the Hot Add Memory feature, use one of the following methods:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about support for the Hot Add Memory feature in Windows Server 2003, visit the following Microsoft Web site: