Have you ever wondered what it means to see more preemptive waits on your SQL Server system? In this article, we will explore the concept of preemptive waits and their impact on performance.

Before we dive into the details, let’s quickly recap the definitions of preemptive and non-preemptive waits. Preemptive waits refer to non-cooperative waits, where the SQL Server execution is interrupted by the operating system (OS) for higher priority tasks. On the other hand, non-preemptive waits are cooperative waits, where SQL Server manages the scheduling of threads and ensures its own priority.

When SQL Server encounters a preemptive wait, it involuntarily gives up execution for other higher priority tasks. This can significantly impact performance and needs to be investigated thoroughly. On the contrary, non-preemptive waits allow SQL Server to manage the scheduling of threads, ensuring optimal performance.

There are various types of preemptive waits that can occur in SQL Server. If you consistently observe high values in preemptive wait types, it is crucial to investigate the root cause. Identifying and addressing the underlying issues can help reduce these waits and improve overall system performance.

If you are unsure about the preemptive wait types you are encountering or need assistance in reducing them, feel free to reach out to me via email or leave a comment below. I am here to help you optimize your SQL Server environment.

For more in-depth information on wait types and queues, I recommend reading the comprehensive blog series on this topic. Additionally, you can connect with me on Twitter for any further questions or queries.

Thank you for reading and stay tuned for more SQL Server insights!