The PostgreSQL 19 Beta 4 build focuses on improved query performance and autovacuum management, including fixes to autovacuum metrics for TOAST tables and balanced maintenance costs in parallel autovacuum workers. These enhancements support better tuning of autovacuum prioritization, benefiting large table maintenance and system stability.
Instances in the Preview Environment persist for a maximum of 60 days and are automatically deleted thereafter. Snapshots within this environment are restricted to use within the preview. Import and export capabilities use PostgreSQL dump and load. The Preview Environment pricing aligns with the US East (Ohio) AWS Region, providing developers a controlled environment to assess upcoming PostgreSQL improvements.
Source & further reading
Amazon RDS for PostgreSQL now supports PostgreSQL 19 Beta 4 in the Amazon RDS Database Preview Environment ↗Source published 2026-09-24. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.