Microsoft KB Archive/843418

= You may experience decreased performance when you access network resources or when you use Microsoft Access in Windows 2000 =

Article ID: 843418

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Office Access 2003
 * Microsoft Access 2002 Standard Edition
 * Microsoft Access 2000 Standard Edition
 * Microsoft Access 97 Standard Edition
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition

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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:

256986 Description of the Microsoft Windows Registry



For a Microsoft Windows XP version of this article, see 834350.



SYMPTOMS
You may experience decreased performance when you access network resources on your Microsoft Windows 2000-based computer. You may also experience the following symptoms of decreased performance when you use Microsoft Access on your Windows 2000-based computer:
 * The .mdb file takes longer to open than you expect.
 * Queries take longer to run than you expect.
 * The process to access network resources takes longer than you expect.



CAUSE
This problem occurs because Windows 2000 does not cache file-path information from long file names when you access network resources.



Hotfix information
To resolve this problem, obtain the latest service pack for Windows 2000. Or, apply the hotfix that is described in this article, and then enable the following registry value:

InfoCacheLevel

Important To modify the default behavior of Windows, you must configure this registry subkey as described in the &quot;Registry information&quot; section. A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
You must have Windows 2000 Service Pack 4 (SP4) installed to apply this hotfix.

Restart requirement
You must restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

Registry 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.

To force Windows to cache path information for long file names, you must create or modify the following registry subkey so that your system can use the hotfix that is contained in this package. To do this, follow these steps:  Click Start, click Run, type regedit, and then click OK. Click the following registry key:

 

 Double-click the InfoCacheLevel value.

Note If InfoCacheLevel does not exist under the Parameters subkey, follow these steps to create the InfoCacheLevel value:  Right-click the Parameters subkey, point to New, and then click DWORD Value. Type InfoCacheLevel in the new value input area, and then press ENTER. Double-click the new InfoCacheLevel value.</ol> </li> Click Hexadecimal, type 10 in the Value data box, and then click OK.</li> Quit Registry Editor.</li></ol>

Note The following are valid values in hexadecimal notation for the InfoCacheLevel value:
 * 0: Disables caching for all files.
 * 1: Enables caching for files with short file names (8.3) - this is the default value.
 * 10: Enables caching for all files.

File information
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

<pre class="fixed_text">Date        Time   Version        Size    File name -- 02-Jun-2004 00:37  5.0.2195.6935  409,360  Mrxsmb.sys 25-May-2004 20:23  5.0.2195.6933  169,968  Rdbss.sys

<div class="workaround_section">

WORKAROUND
To work around this problem, use short names for files and folders. File names must follow the 8.3 naming format. This means that they must be no longer than eight characters, with a three character extension, as in the following example:

<div class="status_section">

STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Additional query words: excessive SMB QUERY_PATH_INFO SMB Transact2 Query TRANSACT2 QUERY_PATH_INFO GetFileAttributes slow reduced SFN LFN

Keywords: kbqfe kbhotfixserver kbwin2000presp5fix kbfix kbbug kbprb KB843418

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