Wait Type FT_IFTS_RWLOCK

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.

e SQL Server FT_IFTS_RWLOCK wait type is a type of wait that occurs when a session is waiting for a read/write lock on a full-text index. This type of wait is typically associated with full-text search operations in SQL Server, such as creating or altering a full-text index or querying a full-text indexed column.

When a session is waiting on the FT_IFTS_RWLOCK wait type, it means that it is unable to proceed with its current operation until it has acquired a read/write lock on the full-text index. This can cause delays and slow down the overall performance of the SQL Server instance, especially if multiple sessions are competing for the same lock.

To troubleshoot and resolve issues related to the FT_IFTS_RWLOCK wait type, it is important to first determine what operation is causing the wait and then investigate why that operation is taking a long time to complete. This may involve looking at the queries or processes that are accessing the full-text index, as well as any other operations that are running concurrently on the SQL Server instance.

In some cases, it may be necessary to optimize the queries or processes that are causing the FT_IFTS_RWLOCK waits, or to adjust the workload on the SQL Server instance to reduce the occurrence of this wait type. It may also be necessary to adjust the settings of the full-text index to improve its performance and reduce the need for read/write locks.

Overall, the FT_IFTS_RWLOCK wait type can be a useful indicator of potential performance issues related to full-text search in SQL Server, and can help DBAs and developers identify and resolve those issues to improve the performance of their databases.

Applies to

• SQL Server 2019
• SQL Server 2022

Related Waits

See Also

• More About FT_IFTS_RWLOCK