Giới thiệu về chức năng Replication(đồng bộ dữ liệu) của ...
If max_slot_wal_keep_size is -1 (the default), replication slots may retain an unlimited amount of WAL files. Otherwise, if restart_lsn of a replication slot ...
PostgreSQL: Documentation: 17: 19.6. Replication
postgres-config update --config max_slot_wal_keep_size=2GB.
Working with read replicas for Amazon RDS for PostgreSQL
The last two states are seen only when max_slot_wal_keep_size is non-negative. If restart_lsn is NULL, this field is null.