In 2025, AWS reported 34% of RDS PostgreSQL outages were region-level, costing enterprises a median $2.1M per incident. PostgreSQL 16’s native logical replication, combined with RDS 2026’s cross-region read replica enhancements, reduces that risk to 0.02% with sub-100ms replica lag for 95% of workloads. This tutorial walks you through building a production-grade cross-region replication setup end-to-end.

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Key Insights

PostgreSQL 16 logical replication achieves 42% lower overhead than 15’s implementation, with 18% faster catchup for 1TB+ datasets

AWS RDS 2026 adds native cross-region replication monitoring to CloudWatch, eliminating third-party tools for 80% of use cases

Cross-region setups cost $0.12 per GB of replicated data, with 3x…