Our latest whitepaper featuring SQL Server Experts Kenneth Fisher and Robert L. Davis

Networking is a very broad topic, most of which is completely transparent to SQL Server and Database Administrators (DBAs). One of the places this fact is most noticeable is in the SQL Server wait statistics (sys.dm_os_wait_stats and sys.dm_os_waiting_tasks). There are a few wait types specifically associated with networking scenarios, but the wait type you most commonly see that may indicate a network issue is ASYNC_NETWORK_IO.

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Kenneth Fisher-

Robert L. Davis-