FIX: BizTalk Server 2004 performance may be poor and your CPU utilization may be high on the SQL Server-based server that hosts the BizTalk Server databases

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SYMPTOMS

You may notice that Microsoft BizTalk Server performance is very poor and that the CPU utilization is 80 percent or more on the SQL Server-based server that hosts the BizTalk Server databases. You may also notice that the stored procedure bts_FindSubscriptions consumes many CPU cycles on the SQL Server-based server.

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RESOLUTION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

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

Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

You must have BizTalk Server 2004 Service Pack 1 (SP1) installed before you install this hotfix.

Restart requirement

You must restart the BizTalk Server Application Service after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) 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.

   Date         Time   Version     Size     File name
   ----------------------------------------------------------------------------
   11-Jan-2005  23:53  3.0.5372.0  221,184  Microsoft.xlangs.biztalk.engine.dll  
   11-Jan-2005  23:53  3.0.5372.0  217,088  Microsoft.xlangs.engine.dll

Note Because of file dependencies, the most recent hotfix that contains these files may also contain additional files.

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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MORE INFORMATION

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 (http://support.microsoft.com/kb/824684/ ) Description of the standard terminology that is used to describe Microsoft software updates

Under certain circumstances, a non-optimal query is generated to be used by the bts_FindSubscriptions stored procedure. In this scenario, the bts_FindSubscriptions stored procedure becomes very inefficient and consumes a larger than expected percentage of CPU cycles on the SQL Server-based server. In this scenario, the bts_FindSubscriptions stored procedure becomes a bottleneck for processing documents in BizTalk Server.

This problem occurs if any one of the values that are returned to the count field for the following query are more than 20:

Use BizTalkMsgBoxDb
SELECT TOP 5 COUNT(*) as count, uidPropID, vtValue FROM EqualsPredicates GROUP BY uidPropID, vtValue HAVING COUNT(*) > 5 ORDER BY count DESC

Note BizTalkMsgBoxDb is a placeholder for the actual name of the BizTalk Server MessageBox database on your SQL Server-based server. If the name of your BizTalk MessageBox database is not BizTalkMsgBoxDb, you must substitute the correct name of your BizTalk MessageBox database before you run this query.

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