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When the new trace flag (TF) 8089 is specified as one of the startup parameters, SQL Server starts to track memory allocations for faster filtered dump generation. The small amount of overhead may be observed with this trace flag.

As soon as the TF 8089 is enabled, you will notice an error message that resembles the following in the error log:

Datetime Server      Page exclusion bitmap is enabled.


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

Important: Starting with SQL Server 2017 Cumulative Update 20 (CU20), the bitmap filtering functionality is enabled by default. Trace flag T8089 will no longer be applied and it will be ignored even if it is turned on. The bitmap filtering functionality can be disabled through trace flag T8095.

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:


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

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