Monitoring Throttling Using Performance Threshold Rules

BizTalk Server will initialize throttling to protect the system from reaching an unrecoverable state. Throttling can indicate a problem and assist you in identifying its source. After you have identified the cause of the bottleneck based on the throttling state, analyze the other performance counters to narrow down the source of the problem.

For example, high contention on the MessageBox database could be due to high CPU usage, which could be caused by excessively paging to disk, which in turn could be caused by low memory conditions. High contention on the MessageBox could also be caused by high lock contention, which could be due to saturated disk drives.

Monitoring the Message Delivery Throttling State and the Message Publishing Throttling State for each host instance is usually a good place to start when troubleshooting throttling. If the value of these counters is not zero, it is indicative that throttling is happening within the BizTalk Server system and it is possible to further analyze the cause of the bottleneck. For descriptions on the other performance counters, see Identifying Bottlenecks in the Database Tier (http://go.microsoft.com/fwlink/?LinkID=154678) in BizTalk Server Help.

BizTalk Server System Performance Counters

Object Instance Counter Monitoring Purpose
Processor _Total % Processor Time Resource Contention
Process BTSNTSvc Virtual Bytes Memory Leak/Bloat
Process BTSNTSvc Private Bytes Memory Leak/Bloat
Process BTSNTSvc Handle Count Resource Contention
Process BTSNTSvc Thread Count Resource Contention
Physical Disk _Total % Idle Time Resource Contention
Physical Disk _Total Current Disk Queue Length Resource Contention

BizTalk Application Counters

Object Instance Counter Description
BizTalk Messaging RxHost Documents Received/Sec Incoming Rate
BizTalk Messaging TxHost Documents Processed/Sec Outgoing Rate
XLANGs/Orchestrations PxHost Orchestrations Completed/Sec Processing Rate
BizTalk: MessageBox: General Counters MsgBoxName Spool Size Cumulative size of all Host Queues
BizTalk: MessageBox: General Counters MsgBoxName Tracking Data Size Size of TrackingData table on the MessageBox
BizTalk: MessageBox: Host Counters PxHost:MsgBoxName Host Queue - Length Number of messages in the specific Host Queue
BizTalk: MessageBox: Host Counters TxHost:MsgBoxName Host Queue - Length Number of messages in the specific Host Queue
BizTalk: Message Agent RxHost Database Size Size of publishing (PxHost) Queue
BizTalk: Message Agent PxHost Database Size Size of publishing (TxHost) Queue
BizTalk: Message Agent HostName Message Delivery Throttling State Affects XLANG and Outbound transports
BizTalk: Message Agent HostName Message Publishing Throttling State Affects XLANG and Inbound transports

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