r4 family
The r4 family has 6 sizes on AWS RDS, from 2 to 64 vCPUs and 15.25 to 488 GiB of memory. In US East (N. Virginia), on-demand prices run $0.25 to $8.00 per hour for PostgreSQL, Single-AZ. It is sold in 18 regions and listed as memory optimized.
Sizes and prices in US East (N. Virginia)
| Type | vCPUs | Memory (GiB) | On-demand /hr | 1-yr reserved /hr |
|---|---|---|---|---|
| db.r4.large | 2 | 15.25 | $0.25 | – |
| db.r4.xlarge | 4 | 30.5 | $0.5 | – |
| db.r4.2xlarge | 8 | 61 | $1.00 | – |
| db.r4.4xlarge | 16 | 122 | $2.00 | – |
| db.r4.8xlarge | 32 | 244 | $4.00 | – |
| db.r4.16xlarge | 64 | 488 | $8.00 | – |
Compare r4
Categories
Regions
Asia Pacific (Tokyo)Asia Pacific (Seoul)Asia Pacific (Osaka)Asia Pacific (Mumbai)Asia Pacific (Singapore)Asia Pacific (Sydney)Canada (Central)EU (Frankfurt)EU (Ireland)EU (London)EU (Paris)South America (Sao Paulo)US East (N. Virginia)US East (Ohio)AWS GovCloud (US-East)AWS GovCloud (US-West)US West (N. California)US West (Oregon)
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.