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SQL Server, Broker/DBM Transport object

Applies to: SQL Server

The Broker / DBM Transport performance object contains performance counters that report networking information for Service Broker and database mirroring. The table below lists the counters that this object contains.

SQL Server Broker/DBM Transport counter Description
Current Bytes for Recv I/O This counter reports the number of bytes to be read by the currently running transport receive operations.
Current Bytes for Send I/O This counter reports the number of bytes in message fragments that are currently in the process of being sent over the network.
Current Msg Frags for Send I/O This counter reports the total number of message fragments that are in the process of being sent over the network.
Message Fragment P1 Sends/sec This counter reports the number of priority 1 message fragments sent over the network per second.
Message Fragment P2 Sends/sec This counter reports the number of priority 2 message fragments sent over the network per second.
Message Fragment P3 Sends/sec This counter reports the number of priority 3 message fragments sent over the network per second.
Message Fragment P4 Sends/sec This counter reports the number of priority 4 message fragments sent over the network per second.
Message Fragment P5 Sends/sec This counter reports the number of priority 5 message fragments sent over the network per second.
Message Fragment P6 Sends/sec This counter reports the number of priority 6 message fragments sent over the network per second.
Message Fragment P7 Sends/sec This counter reports the number of priority 7 message fragments sent over the network per second.
Message Fragment P8 Sends/sec This counter reports the number of priority 8 message fragments sent over the network per second.
Message Fragment P9 Sends/sec This counter reports the number of priority 9 message fragments sent over the network per second.
Message Fragment P10 Sends/sec This counter reports the number of priority 10 message fragments sent over the network per second.
Message Fragment Receives/sec This counter reports the number of message fragments received over the network per second.
Message Fragment Sends/sec This counter reports the number of message fragments of all priorities sent over the network per second.
Msg Fragment Recv Size Avg This counter reports the average size of message fragments received over the network.
Msg Fragment Recv Size Avg Base For internal use only.
Msg Fragment Send Size Avg This counter reports the average size of the message fragments sent over the network.
Msg Fragment Send Size Avg Base For internal use only.
Open Connection Count This counter reports the number of network connections that Service Broker currently has open.
Pending Bytes for Recv I/O This counter reports the number of bytes contained in message fragments that have been received from the network but have not yet been placed on a queue or discarded.
Pending Bytes for Send I/O This counter reports the total number of bytes in message fragments that are ready to be sent over the network.
Pending Msg Frags for Recv I/O This counter reports the number of message fragments that have been received from the network, but that have not yet been placed on a queue or discarded.
Pending Msg Frags for Send I/O This counter reports the total number of message fragments that are ready to be sent over the network.
Receive I/O bytes/sec This counter reports the number of bytes per second received over the network by Service Broker endpoints and Database Mirroring endpoints.
Receive I/O Bytes Total This counter reports the total number of bytes received over the network by Service Broker endpoints and Database Mirroring endpoints.
Receive I/O Len Avg This counter reports the average number of bytes for a transport receive operation.
Receive I/O Len Avg Base For internal use only.
Receive I/Os/sec This counter reports the number of transport receive I/O operations per second that the Service Broker / DBM transport layer has completed. A transport receive operation might contain more than one message fragment.
Recv I/O Buffer Copies bytes/sec The rate at which transport receive I/O operations had to move buffer fragments in memory.
Recv I/O Buffer Copies Count The number of times when transport receive I/O operations had to move buffer fragments in memory.
Send I/O bytes/sec This counter reports the number of bytes per second sent over the network by Service Broker endpoints and Database Mirroring endpoints.
Send I/O Bytes Total This counter reports the total number of bytes sent over the network by Service Broker endpoints and Database Mirroring endpoints.
Send I/O Len Avg This counter reports the average size in bytes of each transport send operation. A transport send operation might contain more than one message fragment.
Send I/O Len Avg Base For internal use only.
Send I/Os/sec This counter reports the number of transport send I/O operations per second that have completed. A transport send operation might contain more than one message fragment.

Example

You begin to explore the query performance counters in this object using this T-SQL query on the sys.dm_os_performance_counters dynamic management view:

SELECT * FROM sys.dm_os_performance_counters
WHERE object_name LIKE '%Broker/DBM Transport%';