This wait accumulates while SQL Server is performing operating system service operations. It does not appear to charge during service (SQL Server or Agent) start-up, stop or resume activities. This wait type is not documented by Microsoft so not much is known about it. Pre-emptive waits are different from regular (emptive) waits as their execution is controlled by an external processes such as the operating system. This wait is common and moderate values do not appear to cause any issues. If values are excessive see the suggested solutions below

Resolved by


Suggested solutions

  1. Check the SQL Server error log for more information
  2. Check the Windows Event Viewer for any suspicious events

Additional research


See more

Consider using ApexSQL Monitor, a Windows and SQL Server monitoring tool able to track SQL Server wait types, including the individual query wait statistics

⇐ Back to index