The number of transactions that flowed to operations in this service per second. This counter is incremented any time a transaction ...

The number of transactions that flowed to operations in this service per second. This counter is incremented any time a transaction ID is present in the message that is sent to the service. http://msdn.microsoft.com/en-US/library/System.ServiceModel.Diagnostics.PerformanceCounters.Service.TxFlowedPerSecond.aspx