SQL Server Wait Type: SLEEP_MEMORYPOOL_ALLOCATEPAGES

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 SQL Server SLEEP_MEMORYPOOL_ALLOCATEPAGES wait type is used to indicate that a thread is sleeping while it waits for memory pages to be allocated. This typically occurs when a thread needs to allocate additional memory pages for use by the SQL Server database engine, but the memory manager is unable to immediately provide the pages.

When a thread encounters a SLEEP_MEMORYPOOL_ALLOCATEPAGES wait, it means that it is unable to continue with its current task until the memory pages have been allocated. This can cause performance issues, as other threads may also be waiting on the same memory pages to be allocated before they can continue with their own tasks.

To alleviate this problem, it is important to monitor for SLEEP_MEMORYPOOL_ALLOCATEPAGES waits and take action to address any underlying issues that may be causing long allocation times. This could include optimizing the memory allocation process itself, or ensuring that there is sufficient available memory to meet the needs of the SQL Server database engine.

Overall, the SQL Server SLEEP_MEMORYPOOL_ALLOCATEPAGES wait type is an important indicator of potential performance issues related to memory allocation. By monitoring for this wait type and taking action to address any underlying issues, it is possible to improve the overall performance of your SQL Server database.

More details avilable on this wait type here: http://DatabaseHealth.com/Waits/SLEEP_MEMORYPOOL_ALLOCATEPAGES.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.