If the config switch is not enabled, behavior is unchanged compared to previous versions. Or by setting environment variable COMPLUS_GCStaticsNoLockto a non-zero value.
A config switch has been introduced as a workaround. In scenarios with both high numbers of assemblies and high numbers of GC heaps, Server GC can encounter serious lock contention during generation 2 GCs. This update is cumulative and contains all previously released security improvements. There are no new security improvements in this release. Before you install this update, see the Prerequisites and Restart requirement sections. We recommend that you apply this update as part of your regular maintenance routines.
The Augupdate for Windows 10, version 2004, Windows Server, version 2004, Windows 10, version 20H2, and Windows Server, version 20H2, and Windows Version 21H1 includes cumulative reliability improvements in.