What’s the issue?
Trace flag 9567 is enabled globally.
Why is this a problem?
This trace flag enables compression of the data stream for availability groups during automatic seeding. This compression can significantly reduce the transfer time during automatic seeding, but also increases the load on the processor.
What should you do about this?
If you are not currently automatically seeding a replica, or do not plan to do so in the future, you can disable this trace flag.
Read more…
Tune compression for availability group – SQL Server Always On | Microsoft Learn
