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:
256986 Description of the Microsoft Windows registry
RESOLUTION
This fix allows a workaround in a scenario in which most messages vary in size between two close values -- for example, where body size ranges between 500 and 1000 bytes.
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.
The fix adds the following DWORD registry value, which forces the driver to allocate a minimum number of bytes for each packet:
HKEY_LOCAL_MACHINE\Software\Microsoft\MSMQ\Parameters\MinimumAllocation
This value must include MSMQ headers as well. When no options are set, a Microsoft Message Queuing header is typically in the range of 160 to 200 bytes. In the preceding scenario, if you don't use encryption and authentication, a value of 1200 is sufficient.
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:
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 typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English-language version of this fix should have the following file attributes or later:
Date Time Version Size File name
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02/28/2001 17:54 5.0.0.720 273kb mq1repl.dll
02/28/2001 17:47 5.0.0.720 14kb mq1sync.dll
02/28/2001 17:47 5.0.0.733 70kb mqac.sys
02/28/2001 17:54 5.0.0.721 210kb mqads.dll
02/28/2001 17:47 5.0.0.720 22kb mqbkup.exe
02/28/2001 17:54 5.0.0.720 29kb mqcertui.dll
02/28/2001 17:54 5.0.0.720 49kb mqclus.dll
02/28/2001 17:54 5.0.0.720 30kb mqdbodbc.dll
02/28/2001 17:54 5.0.0.720 74kb mqdscli.dll
02/28/2001 17:54 5.0.0.720 41kb mqdssrv.dll
02/28/2001 17:47 5.0.0.720 96kb mqmig.exe
02/28/2001 17:54 5.0.0.720 258kb mqmigrat.dll
02/28/2001 17:54 5.0.0.720 219kb mqoa.dll
02/28/2001 17:54 5.0.0.720 8kb mqperf.dll
02/28/2001 17:54 5.0.0.733 406kb mqqm.dll
02/28/2001 17:54 5.0.0.720 9kb mqrperf.dll
02/28/2001 17:54 5.0.0.733 90kb mqrt.dll
02/28/2001 17:54 5.0.0.720 69kb mqsec.dll
02/28/2001 17:54 5.0.0.720 391kb mqsnap.dll
02/28/2001 17:48 5.0.0.720 14kb mqsvc.exe
02/28/2001 17:54 5.0.0.720 24kb mqupgrd.dll
02/28/2001 17:54 5.0.0.720 106kb mqutil.dll
02/28/2001 17:54 5.0.0.720 64kb msmq.cpl
02/28/2001 17:54 5.0.0.720 156kb msmqocm.dll