The DocLink Full Text Capture service will poll for new documents about every 10 minutes. The Active log will provide a history of the service.
You can view documents that have been processed in Service Monitor > DocLink Full Text Capture Service > Management > Full-Text Search Processing > Document Text tab.
You can double-click on a record in the grid to open the document in the viewer.
The Service Configuration screen allows you to set the number of days failed documents will remain in the queue before being removed. Once removed, they will not be re-evaluated.