FIX: You see performance degradation when you send data by using the XMLHTTPRequest object (316269)



The information in this article applies to:

  • Microsoft XML 4.0

This article was previously published under Q316269

SYMPTOMS

If you try to send more than 10 megabytes (MB) of data by using the XMLHTTPRequest object, the performance of the send action decreases. It takes a long time to send the data through the channel. The Performance Monitor (perfmon) shows that no data is transmitted over the channel. When you send the data, the CPU usage remains high, and the send action stops to respond.

CAUSE

When you send the data by using the XMLHTTPRequest object, many copies of the data are generated in the memory before the data is sent. Much memory is used before the data is sent over the channel. Therefore, CPU utilization remains high, and it takes a long time to send lots of data.

RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft XML 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

818409 How to obtain the latest Microsoft XML 4.0 service pack

Hotfix information


A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem immediately, 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: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. 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.
    Date         Time   Version      Size    File name
   --------------------------------------------------
   07-01-2002    11.43  4.0.9307.0   1,229,824 msxml4.dll   
   07-01-2002    11.39  4.0.9307.0      44,544 msxml4a.dll
   07-01-2002    11.39  4.0.9307.0      82,432 msxml4r.dll                                            

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in MSXML 4.0 Service Pack Service Pack 1.

Modification Type:MinorLast Reviewed:10/11/2005
Keywords:kbHotfixServer kbQFE kbQFE kbXML kbPerfMon kbDLL kbPerformance kbbug kbfix KB316269 kbAudDeveloper