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Amazon ElastiCache now supports Valkey 9.1

Amazon ElastiCache supports Valkey 9.1 for node-based clusters, offering higher throughput, improved memory efficiency, and stronger access control for multi-tenant workloads

Amazon ElastiCache now supports Valkey 9.1 for node-based clusters, delivering higher throughput, improved memory efficiency, and stronger access control for multi-tenant workloads. This release includes a redesigned I/O threading model that improves throughput by up to 17%, reduces memory usage for strings under 128 bytes by up to 20%, and introduces database-level access control lists that allow administrators to scope user permissions to specific numbered databases. New commands like HGETDEL for atomic hash field retrieval and deletion, MSETEX for setting multiple keys with a shared expiration, and CLUSTERSCAN for cluster-wide key iteration simplify workflows that previously required multi-step client logic. The release also adds new main-thread and I/O-thread usage metrics for better operational visibility.

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