Wait Type FT_IFTSHC_MUTEX

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.

One of the key performance metrics for any database system is the amount of time it takes for the system to respond to queries from users. One of the wait types that can impact the performance of SQL Server is FT_IFTSHC_MUTEX.

The FT_IFTSHC_MUTEX wait type occurs when a process in SQL Server is waiting for a Full-Text Search service to release a shared resource. Full-Text Search is a feature in SQL Server that allows users to search for specific words or phrases within a database.

When a process in SQL Server needs to access the Full-Text Search service, it must first acquire a mutex (a type of synchronization object) to ensure that it has exclusive access to the service. If the mutex is already held by another process, the process will wait until it is released before continuing. This wait can cause performance issues if it occurs frequently or for long periods of time.

To address this issue, you can try optimizing the performance of the Full-Text Search service by making sure that it has enough memory and CPU resources available. You can also try optimizing the queries that use the Full-Text Search service to reduce the number of times that the service is accessed.

In summary, the FT_IFTSHC_MUTEX wait type in SQL Server indicates that a process is waiting for the Full-Text Search service to release a shared resource. This can cause performance issues if it occurs frequently or for long periods of time. To address this issue, you can try optimizing the performance of the Full-Text Search service and optimizing the queries that use it. By taking these steps, you can help improve the performance of your SQL Server database and ensure that it can respond to queries quickly and efficiently.

Applies to

• SQL Server 2019
• SQL Server 2022

Related Waits

See Also

• More About FT_IFTSHC_MUTEX