I am looking to setup a replica for OLAP queries. Currently in my prod I have a master (OLTP node) replicating to a slave via streaming replica. I don't want to use streaming replica for OLAP queries because I would probably need different set of indexes and permissions on OLAP db. So I am planning to setup a pglogical replica.
Will there be any performance hit on master because of this?
Also I am planning to have master replicating to both a streaming replica (for HA) and a pglogical replica (for OLAP). Is it possible?
Any other implications/side-effects I should be worried about?