SQL Server Always On Availability Group Performance

See

https://blogs.msdn.microsoft.com/psssql/2018/04/05/lesson-learned-from-an-availability-group-performance-case/?utm_source=dlvr.it&utm_medium=twitter

which references

https://blogs.msdn.microsoft.com/saponsqlserver/2013/04/21/sql-server-2012-alwayson-part-11-performance-aspects-and-performance-monitoring-i/

https://blogs.msdn.microsoft.com/saponsqlserver/2013/04/24/sql-server-2012-alwayson-part-12-performance-aspects-and-performance-monitoring-ii/

https://blogs.msdn.microsoft.com/psssql/2018/04/05/troubleshooting-data-movement-latency-between-synchronous-commit-always-on-availability-groups/

https://blogs.msdn.microsoft.com/psssql/2018/04/05/troubleshooting-sql-server-scheduling-and-yielding/

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