Documentation: 17: 26.2. Log-Shipping Standby Servers
Rename configuration parameter wal_keep_segments to wal_keep_size (Fujii Masao) ... Allow WAL storage for replication slots to be limited by max_slot_wal_keep_size (Kyotaro Horiguchi).
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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® Extensions to the JDBC API | pgJDBC
postgres-config update --config max_slot_wal_keep_size=2GB. ... max_replication_slots: Defines the number of replication slots for data streaming.
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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.
