PostgreSQL Replication Slots

Databases: repmgr 4 and postgres on ubuntu (ERROR: replication slot repmgr_slot_2

Important: A slot that's not conf file on the source instance if you see this error: ERROR: could not connect to the postgresql server in replication mode

replication slot should be UNIQUE and must contain NOT NULL columns; 28 Replica Identity ○ FULL ○ Entire old row is written in WAL ○ Most resource

replication slot does not exist Now a common cause for this kind of issue are replication slots which are not advanced: in that case, Postgres will hold on to all WAL