title: BizTalk singleton orchestration instance has been flooded
body: <p>We have a singleton (sequential convoy) orchestration instance which has been flooded with about 14000 messages. This has meant that the instance has been processing for 8 days, but the rate of processing is currently very slow (about 1 per 7 minutes). The instance started fast, but has slowed down to this current performance level over the past few days. </p>
  
  <p>We have diverted further messages away from this instance and our plan is to terminate it once it has finished processing through the backlog. </p>
  
  <p>The problem is, based on the current processing rate we have calculated we have three days before it finishes (about 660 messages left to process).</p>
  
  <p>My question is: Is there any way we can speed this up? </p>