MemoryDB now supports Valkey, a drop-in replacement for Redis OSS offering significant cost and performance advantages. However, many deployments still default to Redis OSS, incurring higher hourly costs and unnecessary data write charges. For compatible workloads, continuing to use Redis OSS instead of Valkey represents a missed opportunity for savings and modernization.
MemoryDB charges based on provisioned instance hours, with costs varying by engine type. Valkey instances offer \~30% lower hourly rates and no data write charges up to 10 TB/month. Selecting Redis OSS instead of Valkey can lead to unnecessarily high compute and storage costs.
