wal_level = hot_standby                 # minimal, replica, or logical 
max_wal_senders = 7             # max number of walsender processes
wal_keep_segments = 100         # in logfile segments, 16MB each; 0 disables
max_replication_slots = 5       # max number of replication slots
hot_standby = on                        # "on" allows queries during recovery