Microsoft KB Archive/236964

= Delayed Return of Paged Pool Causes Error 1450 "Insufficient Resources" =

Article ID: 236964

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows NT 4.0 Service Pack 6
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT 4.0 Service Pack 6

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This article was previously published under Q236964



SYMPTOMS
The problem described in this article is difficult to identify. One way to check for the problem if you suspect you are experiencing it is to calculate the number of files open on the Window NT-based computer and look at their size. If you have approximately 180 gigabytes (GB) of open files that are not being closed continuously or are opened and closed rapidly in a looping condition, you may be experiencing this problem. Also, your programs may be receiving an INSUFFICIENT_RESOURCES error message when attempting to open, create, or extend a file.

This problem can be intermittent. If you try the operation again it is possible for it to succeed. This behavior occurs because it is possible to have a program create and close files faster than Windows NT can clean up. When this occurs it is possible for the operation to succeed if retried.

Another method that you can use to identify the problem is to start Task Manager and click the Performance tab. At the bottom of the tab, locate the Kernel Memory section and watch the value for Paged Memory. You may experience the problem when that value reaches approximately 190. If this value goes back down immediately, you should be able to retry the operation that caused the error message and have it succeed (if the system has enough resources to fulfill the program's request).



CAUSE
In Windows NT 4.0 Service Pack 4 (SP4), optimization was added to the cache manager and the NTFS file system that allows NTFS to return a FALSE response when the cache manager tries to acquire a file for "lazy" writing. NTFS does this when it is in the middle of a clean checkpoint, because clean checkpoints can take time to finish. This allows the cache manager to move on to other files on other volumes instead of waiting for the clean checkpoint to finish.

In this case, NTFS needs to free recently deallocated clusters. NTFS does this by forcing a clean checkpoint. In this particular situation, the cache manager should wait for the checkpoint to finish instead of moving on to work on other files, because it is not really a clean checkpoint and should not take very long.

The solution is not to let NTFS return a FALSE response to the cache manager when it is performing a clean checkpoint as a result of needing recently deallocated clusters freed.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:


 * http://www.microsoft.com/windows/servicepacks/ -or-


 * 152734 how to obtain the latest windows nt 4.0 service pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/directory/overview.asp



STATUS
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT Server version 4.0, Terminal Server Edition Service Pack 6.

Additional query words: insufficient resources

Keywords: kbbug kbfix kbqfe kbhotfixserver KB236964

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