KB4548103 - FIX: Performance degradation occurs on PMEM devices with Hybrid Buffer Pool enabled in SQL Server 2019

Applies to: SQL Server 2019 on Windows

Symptoms


Assume that you have Hybrid Buffer Pool enabled on a database in SQL Server 2019. When the Persistent memory (PMEM) devices have low memory, you may notice performance degradation.

Status


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

Resolution


This improvement is included in the following cumulative update for SQL Server:
Note To fix this issue, Trace Flag (TF) 888 has to be enabled.

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:

References


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