IT Architects Alliance

Sep 20, 2026 · Databases

Where Write Time Goes in Multi-Region Active-Active Databases

This article analyzes write latency in multi-region active-active databases like AWS Aurora DSQL, showing that local execution is only a small fraction of total latency while cross-region commit coordination dominates; it also examines optimistic concurrency control conflicts, hotspot contention, isolation level limitations, and criteria for when multi-region active-active truly benefits applications.