PostgreSQL in ever more critical environments
summary
Postgres powers banks, insurers, crypto and government sites and a 2017 telecom deployment exposes scalability limits that trigger a decade of work. The Postgres 19 execution plan now chooses to aggregate first then join for certain queries, yielding roughly 2x–3x faster performance on those workloads. The change is community-built, driven by real-world problems, and ships in production — a feature born from a specific failure that actually fixes the bottleneck.
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