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 XE_LIVE_TARGET_TVF wait type in SQL Server is a type of wait that occurs when a task is waiting for a query against an Extended Events target to complete. Extended Events is a feature in SQL Server that allows users to collect data about events that occur in the database engine. One way to access this data is by querying an Extended Events target, which is a virtual table that contains the collected event data. When a task is in the XE_LIVE_TARGET_TVF wait state, it is waiting for a query against an Extended Events target to complete before it can continue execution. This wait type is typically only seen when working with Extended Events.
More details avilable on this wait type here: http://DatabaseHealth.com/Waits/XE_LIVE_TARGET_TVF.html
Do you have a favorite tool for monitoring your wait statistics on SQL Server over time? This is something that you can use Database Health monitor to do. More details at http://DatabaseHealth.com.
If you are having performance issues assocaited with this wait type and need soem help, please contact us with our 30 minute consulation link.
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