What does the wait type PREEMPTIVE_OS_AUTHORIZATIONOPS mean?
I have a service which is executing a stored procedure to log historical data. It has been running fine for a few months. Out of the blue I found we were no longer logging data and the service calls to SQL were timeing out because the connection pool was full. The activity monitor showed hundreds of processes with that wait type, no wait resource and no block by.
The only google hits on it talk about this being added in 2008.