Microsoft KB Archive/193390

= FIX: SQL-DMO::EnumQueuedTasks May Cause Memory Leak =

Article ID: 193390

Article Last Modified on 10/7/2005

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APPLIES TO


 * Microsoft SQL Server 6.5 Standard Edition
 * Microsoft SQL Workstation 6.5

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This article was previously published under Q193390



BUG #: 18128 (SQLBUG_65)



SYMPTOMS
The SQL Distributed Management Objects (SQL-DMO) Executive object's EnumQueuedTasks method is used to enumerate running tasks on SQL Server. SQL Server and SQL Executive may leak 4 KB of memory each time the EnumQueuedTasks method is invoked. SQL Enterprise Manager invokes this method when the Refresh button is pressed in the Current Activity window.

Over an extended period time, this may cause adverse memory effects on the server computer.



CAUSE
The SQL Server and SQL Executive services exchange task information by means of a shared memory area. The action of sharing the information is not properly releasing all allocated memory.



RESOLUTION
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 SQL Server 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:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

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 version of this fix should have the following file attributes or later:   File name     Platform --

Sql447i.exe  Intel Sql447a.exe  Alpha NOTE: Due to file dependencies, the most recent hotfix or feature that contains the above files may also contain additional files.



STATUS
Microsoft has confirmed this to be a problem in SQL Server 6.5.



MORE INFORMATION
You can confirm that the memory leak is occurring by watching the Windows NT performance counters.

Use Windows NT Performance Monitor to watch the Virtual Bytes counter for the SQL Server (Sqlservr.exe) and SQL Executive (Sqlexec.exe) processes.

Additional query words: SEM 4K slow hang hangs perfmon sqldmo dist obj

Keywords: kbbug kbfix kbqfe KB193390

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