Using PostgreSQL Replication Slots
In Postgres 9.4, replication slots were introduced. A process receiving changes via streaming replication can create a replication slot on the primary server.
pg-logical-replication - npm
ERROR: could not create replication slot "my_subscription": ERROR: logical decoding requires wal_level >= logical.
How to delete replication slot in postgres 9.4
Explore failover logical replication slots in Postgres v17, allowing you to keep track of how far a specific subscriber has consumed a database’s change event stream.