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 ...
Amazon Aurora PostgreSQL parameters
The max_slot_wal_keep_size parameter controls the quantity of WAL data that the RDS for PostgreSQL DB instance retains in the pg_wal directory to serve slots.
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Summary We are using max_slot_wal_keep_size from Postgresql 13 to prevent master from being killed by a lagging replication.