Steve Jones - SSC Editor (6/25/2016)
This is a single threaded connection available for adminstrators that doesn't get resources blocked by long running queries.
Kinda true. It's got its own scheduler and memory reservation so can run stuff when other schedulers stuck, but it still needs locks/latches/other resources as normal.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability