suppose I am having a AG with 2 replica , both in Sync mode. And we know in order to commit a transaction , the log required to be hardened in the secondary replica and acknowledge the primary it's hardened.
So what's the mechanism on the primary to give up to receive the acknowledgement from secondary (Suppose the hardening for log is successful ) and commit the transaction without waiting it ??
And secondly is that the default always-on xevent should be turn on ? will it draw so much overhead on the overall system ?