Thank you so much.This information was really helpful for us understanding the working of these parameters.
One follow up question i have , as we are setting one of the standby/replica with value idle_in_transaction_session_timeout=-1 which can cause the WAL's to be heavily backlogged in a scenario where we have a query running for very long time on that instance. So in that case will there be chances of instance restart and if that can be avoided anyway?
And the plan is to set these system parameters with different values in writer/read replica , so in that case if we apply the "alter system" command on the primary , won't the WAL going to apply those same commands forcibly on reader instance making those same as the writer instance configuration( but we want the reader replica configuration to be different from writer)?
Appreciate your guidance.
My apologies. I was meant to say setting up "max_standby_streaming_delay" To -1. Which means unlimited lag.