Symptoms

In Microsoft SQL Server 2019, the ForceLastGoodPlan feature for Automatic Tuning doesn't take CPU consumption of aborted queries into account in the execution plan regression detection logic. The feature recognizes query execution time-outs as client-side aborts, and chooses not to interfere. If the query with a regressed plan is consistently timing out, the ForceLastGoodPlan feature won't detect and correct the plan regression.

Resolution

Cumulative update information

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

Cumulative Update 14 for SQL Server 2019

Each new cumulative update for SQL Server contains all the hotfixes and security fixes that were in the previous build. We recommend that you install the latest build for your version of SQL Server:

Latest cumulative update for SQL Server 2019

Status

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

References

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

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