cache.m4.2xlarge is an AWS ElastiCache size with 8 vCPUs, 29.7 GiB memory. In US East (N. Virginia) it costs $0.623 per hour on demand ($454.79 per month) for Redis. It is sold in 14 regions.
Prices by region
USD per hour, Redis. Reserved prices are no upfront, standard. Cheapest on-demand first.