Wait statistics, in the context of SQL Server, refer to the amount of time that a query spends waiting to access data in the database. When a client application requests data from the database, the request is placed in a queue and the client application must wait for its turn to access the data. The time that the query spends waiting is called a "wait" and is tracked by SQL Server. This information can be used to identify potential performance bottlenecks and optimize the performance of the database. Wait statistics are commonly used by database administrators to diagnose and troubleshoot performance issues in SQL Server.
The PREEMPTIVE_OS_AUTHORIZATIONOPS wait type is a common wait type that occurs in SQL Server when a query is executing a security-related operation. This wait type indicates that SQL Server is waiting for the operation to be completed by the operating system. This can happen, for example, when a query is trying to authenticate a user or authorize access to a resource. The PREEMPTIVE_OS_AUTHORIZATIONOPS wait type can be caused by a variety of factors, including network latency, slow authentication processes, or inadequate permissions.
