r8a family
The r8a family has 9 sizes on AWS RDS, from 2 to 192 vCPUs and 16 to 1536 GiB of memory. In US East (N. Virginia), on-demand prices run $0.3019 to $28.982 per hour for PostgreSQL, Single-AZ. It is sold in 9 regions and listed as memory optimized.
Sizes and prices in US East (N. Virginia)
| Type | vCPUs | Memory (GiB) | On-demand /hr | 1-yr Savings Plan /hr |
|---|---|---|---|---|
| db.r8a.large | 2 | 16 | $0.3019 | $0.2415 |
| db.r8a.xlarge | 4 | 32 | $0.6038 | $0.483 |
| db.r8a.2xlarge | 4 | 64 | $1.208 | $0.9661 |
| db.r8a.4xlarge | 8 | 128 | $2.415 | $1.932 |
| db.r8a.8xlarge | 16 | 256 | $4.83 | $3.864 |
| db.r8a.12xlarge | 48 | 384 | $7.246 | $5.796 |
| db.r8a.16xlarge | 64 | 512 | $9.661 | $7.729 |
| db.r8a.24xlarge | 96 | 768 | $14.491 | $11.593 |
| db.r8a.48xlarge | 192 | 1536 | $28.982 | $23.186 |
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Prices in USD per hour for PostgreSQL, Single-AZ; reserved prices are 1 year, no upfront. Updated 2026-11-12 from AWS public price lists. Compare all AWS RDS sizes.