Is there a standard way of estimating what total bandwidth requirements are between a primary and replica using streaming replication? I understand we can take the size and number of the WAL files but I also understand that using streaming replication data is propagated ahead of the WAL file being filled so I assume that there is a streamed + WAL file type calculation to perform. Short of tracking the data at the network level is there a rough way to calculate the requirement?
Thanks
Simon
WAL information is not transferred using log file shipping, but it is still the same WAL. So the amount of WAL written to the log files is a good measure for the required bandwidth.