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"hot_standby" and "archive" are mapped to "replica" See https://www.postgresql.org/docs/10/runtime-config-wal.html#GUC-WAL-LEVEL > In releases prior to 9.6, this parameter also allowed the values > archive and hot_standby. > These are still accepted but mapped to replica.
Upstream change on 9.6 postgres/postgres@8f2977b > max_wal_size = (3 * checkpoint_segments) * 16MB > Note that the default setting for max_wal_size is > much higher than the default checkpoint_segments used > to be, so setting this might no longer necessary.
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This PR applies some minor changes (introduced: v9.6) to postgresql.conf.
wal_levelon hot standby fromhot_standbytoreplica(same meaning)checkpoint_segments_settingon hot standby