r8g family
The r8g 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 $0.239 to $22.944 per hour for PostgreSQL, Single-AZ. It is sold in 27 regions and listed as memory optimized and Arm (Graviton).
Sizes and prices in US East (N. Virginia)
| Type | vCPUs | Memory (GiB) | On-demand /hr | 1-yr reserved /hr |
|---|---|---|---|---|
| db.r8g.large | 2 | 16 | $0.239 | $0.16 |
| db.r8g.xlarge | 4 | 32 | $0.478 | $0.32 |
| db.r8g.2xlarge | 8 | 64 | $0.956 | $0.641 |
| db.r8g.4xlarge | 16 | 128 | $1.912 | $1.281 |
| db.r8g.8xlarge | 32 | 256 | $3.824 | $2.562 |
| db.r8g.12xlarge | 48 | 384 | $5.736 | $3.843 |
| db.r8g.16xlarge | 64 | 512 | $7.648 | $5.124 |
| db.r8g.24xlarge | 96 | 768 | $11.472 | $7.686 |
| db.r8g.48xlarge | 192 | 1536 | $22.944 | $15.372 |
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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.