Amazon RDS enhanced its Multi-AZ high-availability configurations by utilizing ENA Express for replication traffic, improving network performance with up to 25 Gbps bandwidth, dynamic multipath routing, and advanced congestion control. This reduces replication latency variability and increases write throughput for write-heavy workloads.
The integration benefits various database engines including MariaDB, MySQL, PostgreSQL, Db2, and Oracle, and is deployed across dozens of AWS regions worldwide, including GovCloud. Existing RDS instances can opt-in by performing configuration changes like start-stop or compute scaling. The feature is provided at no extra cost to customers.
Source & further reading
Amazon RDS now supports ENA Express for Multi-AZ replication ↗Source published 2026-05-26. 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.