Introduction

Few Problems

• BizTalk is performing slower ,when we drop the messages or during high volume of messages
• Large no of messages are causing memory errors in BizTalk farm
• Prolonged BizTalk Throttling
• BizTalk receive location is not picking up the files
• BizTalk Database Jobs are taking too much time to complete
• Response time of message processing is increasing. There is a high latency in environment
• It seems BizTalk is not able to process any message, The messages or service instance are in Active/Running State, however nothing is happening
• SOAP Adapter is taking long time call a Web Service
• Orchestration/Receive Port is taking  long time to debatch a large message
• BizTalk production farm has suddenly started behaving strangle

Few Requirements

• Looking for creating scalable BizTalk solutions
• Looking to achieve a particular latency for a BizTalk application
• Requirement to process 1000 messages in 1 seceond by BizTalk application
• Requirement of processing large messages in BizTalk Server
• Planning to change the performance throughput
• Trying to determine/test maximum sustainable throughput ( MST ) of my BizTalk farm
• Trying to figure if BizTalk farm can support next 20+ applications which are in pipeline
• How should I decide if My BizTalk farm needs to be tuned or optimized
• How  should I decide if BizTalk production farm needs to be scaled up

What Should We Do Now!

First Few Things

Review Application Design

Review Everything Else!

MSDN

• How BizTalk Server Implements Host Throttling - Refer this about getting familiar with Throttling concepts and how the BizTalk Engine does it. 
• What is Host Throttling - Refer this about details of Host Throttling
• Microsoft BizTalk Server Automatic Throttling (Wiki) - In-depth details about throttling
• Throttling - MSDN Blog - Provides details about throttling and how to use performance counters to know more about it.
• Host Throttling Performance Counters - Provides the performance monitor counters that measure system parameters that impact host throttling
• Measuring Maximum Sustainable Engine Throughput-  Refer this for more details about MST and Testing aproaches to determine MST of your BizTalk Engine.
• Load Pattern Tests to Determine Maximum Sustainable Throughput- Refer this about using Visual studio to perfrom automated testing to figure MST
• Measuring Maximum Sustainable Tracking Throughput - Refer this to know more about MST of BizTalk DTA Tracking throughput
• Processing Large Messages - The article defines large messages and provides guidelines for how to configure BizTalk Server process large messages efficiently

Blogs

• Threads Dsatabase Sessions and Throttling 
• Throttling in Full Action - By Yossi Dahan
• BizTalk Orchestration Throttling Pattern- By Richard Seroter
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