We are still using SQL 2014.
We had some significant lag on one of our Secondary Server involving High Availability. It was bad enough that it stopped trying to catch up, until we restarted the SQL Service. That solved the problem until a week or so later it happened again. This happened several times until we gave up and dropped that Server from the Availability Group.
During this same period, we were having some performance issues on the Primary Server (i.e. same AG groups), during peek hours.
A few people on our team tried to say it was very likely that these 2 issues were connected. i.e. the H.A. Lag on that Secondary Server caused/contributed to the Performance problems on the Primary. For the most part, these 2 events didn't occur at the same time.
Has anyone experienced H.A. lag causing performance issues on the Primary - or think it is possible in some way? I personally don't see how this is possible. Aside from the obvious that the Tran Log files will continue to grow and eventually take over the Drive on Production.