Description
This wait accumulates when a login starts the Dedicated Administrator Connection (DAC). This connection is reserved for sysadmin members in case the SQL Server instance becomes unresponsive. This wait type is uncommon
Resolved by
DBAs
Suggested solutions
- If this wait type is high use Profiler/trace/Extended Events to identify who is using the DAC connection. SQL Server only allows one login access through the DAC so make sure it is being used only when appropriate
Additional research
Diagnostic Connection for Database Administrators
Filtering Out Benign Waits