When you run The Microsoft BizTalk Adapter for the MQSeries Client (MQSC) that is included together with Microsoft Host Integration Server 2013, you experience a decrease in performance over a long time if you receive message data from an IBM MQSeries server.
In a Performance Monitor log, you may also notice a small but steady increase of private bytes.
This problem is caused by a small memory leak that occurs in the BizTalk Adapter for MQSC.
Cumulative update information
The fix for this problem is included in Cumulative Update 3 for Host Integration Server 2013. For more information about how to obtain the cumulative update package, see Cumulative update package 3 for Host Integration Server 2013.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.