Move Less, Move Faster: Speeding Up Citus Cluster Scaling | POSETTE: An Event for Postgres 2026

This talk covers performance improvements for scaling Citus distributed PostgreSQL clusters, focusing on two key optimizations: increased parallelism in shard rebalancing and snapshot-based node addition that dramatically reduces data copy overhead. Database administrators and developers working with horizontally scaled PostgreSQL will learn actionable strategies for faster scale-out and scale-in operations while maintaining safety constraints.