Aurora serverless raises its ceiling to 384 ACUs, tuning AWS’s serverless database for AI-agent spikes
On October 27, 2026, AWS raised Amazon Aurora serverless to a 384 ACU ceiling for PostgreSQL — 768 GiB of memory and 50 percent more capacity — while keeping scale-down to zero. For the bursty workloads of AI agents, this is the clearest signal yet that AWS wants the serverless database to be the default backplane, provided you treat the ACU ceiling as a real capacity decision.