Need to know more about logical replication slots : rPostgreSQL

Set up logical replication and decoding replication slot A replication slot is created on the primary database server for each standby server The slot keeps track of the last confirmed receive location of WAL data on replication slot does not exist By themselves, replication slots occupy very little disk space They just store tiny bit of metadata, including a pointer to a position in WAL

replication slot Take Away The morale of the story? Don't leave your replication slots unattended! There shouldn't be any slots which are inactive for too long