When a 10TB PostgreSQL dataset hits partition lock contention on Azure Cobalt 100, most teams reach for sharding—but PostgreSQL 17’s native partitioning internals can handle it with 40% lower latency than PG15, no third-party tools required.

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Key Insights

PostgreSQL 17’s partitioned B-tree indexes reduce 10TB scan latency by 62% vs non-partitioned equivalents on Azure Cobalt 100 64-core VMs

Native declarative partitioning in PG17 supports up to 16,384 partitions per table with zero planner overhead for range-partitioned datasets

Running partitioned 10TB workloads on Cobalt 100 saves $2,800/month vs equivalent AWS Graviton 4 instances for…