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PostgreSQL 18 Adds Native Sharding and Distributed Queries

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PostgreSQL 18 introduces native sharding with automatic partition routing achieving 5x write throughput for horizontally scaled deployments. PostgreSQL Foundation reports 80% reduction in cross-shard query latency through parallel execution and query pushdown, while built-in rebalancing tools enable zero-downtime shard splitting for multi-TB databases. Enterprises migrating from MongoDB and Cassandra see 40% cost savings and 99.99% uptime with native ACID guarantees across distributed transactions in 500K+ production PostgreSQL clusters.

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