KB4570571 - FIX: Query slowness may occur when CPU-intensive SQL Server system tasks run in SQL Server 2019

Applies to: SQL Server 2019 on Windows


When using Availability Groups with SQL Server 2019, you notice that some query slowness may occur on one or more replicas when there are CPU-intensiveSQL Server system tasks running.


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


This improvement is included in the following cumulative update for SQL Server:
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