What's new in Postgres 19

Postgres 19 introduces significant enhancements, particularly in table management, query optimization, and default settings. The most notable feature is the incorporation of REPACK into the core system, which allows tables to be rewritten without locking them entirely, enhancing performance and usability compared to previous reliance on extensions like pg_repack and pg_squeeze. This release also disables Just-In-Time (JIT) compilation by default, acknowledging its inefficiencies for certain queries, while offering smarter query planners that can optimize operations such as eager aggregation and anti-joins. Additional updates include new SQL functions, improved handling of foreign-key inserts, and changes to default settings like lz4 for TOAST compression, aiming to streamline and accelerate database operations. With these advancements, Postgres 19 is set to provide more robust and efficient database management capabilities, with a general availability expected by September or October 2026.

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