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Learn how to implement selective data synchronization in PostgreSQL using Logical Replication, including configuration steps, monitoring for WAL buildup, and failure mode analysis.
Goal Determine whether a standby server that was initially set up with wal_level=replica must be restarted, reinitialized, or simply have its wal_level parameter changed and reloaded after the primary’s wal_level is switched to logical during a pg_upgrade to PostgreSQL 14, in order to maintain logical replication compatibility. Constraints and Uncertainty Po