db.r6g.2xlarge is an Amazon DocumentDB size with 8 vCPUs, 64 GiB memory (AWS Graviton2). In US East (N. Virginia) it costs $1.053 per hour on demand ($768.40 per month) for Standard storage. It is sold in 34 regions.
Prices by region
USD per hour, Standard storage. Reserved prices are no upfront, standard. Cheapest on-demand first.