Article ID: 164933 - View products that this article applies to.
This article was previously published under Q164933
This article has been archived. It is offered "as is" and will no longer be updated.
Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/256986/ )Description of the Microsoft Windows Registry
The utility Poolmon.exe located on the Windows NT CD-ROM can be used to track memory usage in both paged and nonpaged pools of memory. When POOLMON is run from the command prompt of Windows NT, the following error is displayed:
Query pooltags Failed c0000002
Poolmon.exe uses a global pooltag in the registry located at a value called GlobalFlag. The default value for GlobalFlag is 0, so Windows NT does not expend extra overhead in gathering pooltag information.
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.
To allow Windows NT to gather pooltag information, the GlobalFlag value must be changed using Registry Editor (Regedt32.exe). Before making changes, write down the current value of GlobalFlag so that it can be reset once running Poolmon.exe is no longer necessary.
The following hex values for GlobalFlag will set up memory tagging in Windows NT for the following versions:
Windows NT 3.5: 0x01000000
Windows NT 3.51: 0x00000400
Windows NT 4.0: 0x00000400
If you are running Windows NT version 3.51 or 4.0 but do not have the Windows NT 4.0 Resource Kit, follow these steps.
To change the value of the GlobalFlag, you need to modify its value in the registry.
To use this utility to enable Pool tagging:
GlobalFlag consists of 32 bits that are used as switches to enable or disable several different advanced internal system diagnostics and troubleshooting tests.
Note In Windows NT versions 3.51 and earlier, changing the value of this entry to 0x20100000 disabled the OS/2 subsystem and caused OS/2-bound applications to run in a virtual DOS computer. This does not work in Windows NT 4.0.
Article ID: 164933 - Last Review: February 24, 2014 - Revision: 3.1