When you run many online transactions on a database in Microsoft SQL Server 2019, you notice severe spinlock contention. The severe contention is generally observed on new generation and high-end systems. The following conditions apply to severe spinlock contention:

  • Requires modern hardware, such as Intel Sklylake processors

  • Requires a server that has many CPUs

  • Requires a high number of concurrent users

  • Symptoms may include unexpected high CPU usage


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


This problem is fixed in the following cumulative update for SQL Server:

About cumulative updates for SQL Server:

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:

Note Trace flag 8101 has to be turned on to enable the fix.


Learn about the terminology that Microsoft uses to describe software updates.

Third-party information disclaimer

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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