The MQSC Adapter may generate excessive network traffic when it receives message from IBM WebSphere Application Server message queues. The overhead of the network traffic may be 4 to 10 times the size of the actual message that is being received from the message queue. The excessive network traffic can be observed in network traces that are used to capture data between the instance of Microsoft BizTalk Server that is using the MQSC Adapter and the IBM WebSphere system. The BizTalk Server does not report any errors or warnings when this occurs.
The MQSC Adapter uses multiple MQGET calls when it retrieves messages from an IBM WebSphere message queue. The excessive network traffic occurs because of the multiple MQGET calls that the MQSC Adapter uses when it reads the message.
Cumulative update information
The fix that resolves this issue is included in cumulative update package 1 for Host Integration Server 2013. For more information about how to obtain the cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
2908834 Cumulative Update Package 1 for Host Integration Server 2013The fix that resolves this problem is included in cumulative update package 9 for Host Integration Server 2010. For more information about how to obtain the cumulative update package, see Cumulative Update 9 for Host Integration Server 2010.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
After you apply the update, the MQSC Adapter improves the efficiency of reading messages from IBM WebSphere message queues by reducing the number of MQGET calls that are used to retrieve messages.