# Amazon RDS Memory-optimized (R-family) 4xlarge instances compared

> Compare all 15 Amazon RDS Memory-optimized (R-family) 4xlarge instances — monthly price across regions and engines, side by side.

Source: https://www.bytebase.com/dbcost/rds/compare/r-4xlarge/

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Pricing below is for US East (N. Virginia) (us-east-1); other regions, engines are on the page.

## PostgreSQL (us-east-1)

| Instance | vCPU | RAM (GB) | On-Demand | 1-yr Reserved | 3-yr Reserved |
|---|---|---|---|---|---|
| db.r3.4xlarge | 16 | 122 | $1,453 | — | — |
| db.r4.4xlarge | 16 | 122 | $1,460 | — | — |
| db.r5.4xlarge | 16 | 128 | $1,460 | $787 | $529 |
| db.r5b.4xlarge | 16 | 128 | $1,729 | $932 | $621 |
| db.r5d.4xlarge | 16 | 128 | $1,669 | $1,218 | $884 |
| db.r6g.4xlarge | 16 | 128 | $1,313 | $708 | $476 |
| db.r6gd.4xlarge | 16 | 128 | $1,502 | $1,096 | $796 |
| db.r6i.4xlarge | 16 | 128 | $1,460 | $787 | $529 |
| db.r6id.4xlarge | 16 | 128 | $1,742 | $1,271 | $923 |
| db.r6idn.4xlarge | 16 | 128 | $2,264 | $1,653 | $1,200 |
| db.r6in.4xlarge | 16 | 128 | $2,020 | $1,475 | $1,071 |
| db.r7g.4xlarge | 16 | 128 | $1,396 | $1,019 | $740 |
| db.r7i.4xlarge | 16 | 128 | $1,460 | $920 | — |
| db.r8g.4xlarge | 16 | 128 | $1,396 | $880 | — |
| db.r8gd.4xlarge | 16 | 128 | $1,594 | — | — |

## MySQL (us-east-1)

| Instance | vCPU | RAM (GB) | On-Demand | 1-yr Reserved | 3-yr Reserved |
|---|---|---|---|---|---|
| db.r3.4xlarge | 16 | 122 | $1,380 | — | — |
| db.r4.4xlarge | 16 | 122 | $1,402 | — | — |
| db.r5.4xlarge | 16 | 128 | $1,402 | $756 | $508 |
| db.r5b.4xlarge | 16 | 128 | $1,729 | $932 | $621 |
| db.r5d.4xlarge | 16 | 128 | $1,669 | $1,218 | $884 |
| db.r6g.4xlarge | 16 | 128 | $1,254 | $676 | $455 |
| db.r6gd.4xlarge | 16 | 128 | $1,502 | $1,096 | $796 |
| db.r6i.4xlarge | 16 | 128 | $1,402 | $755 | $508 |
| db.r6id.4xlarge | 16 | 128 | $1,742 | $1,271 | $923 |
| db.r6idn.4xlarge | 16 | 128 | $2,264 | $1,653 | $1,200 |
| db.r6in.4xlarge | 16 | 128 | $2,020 | $1,475 | $1,071 |
| db.r7g.4xlarge | 16 | 128 | $1,396 | $1,019 | $740 |
| db.r7i.4xlarge | 16 | 128 | $1,460 | $920 | — |
| db.r8g.4xlarge | 16 | 128 | $1,396 | $880 | — |
| db.r8gd.4xlarge | 16 | 128 | $1,594 | — | — |

## MariaDB (us-east-1)

| Instance | vCPU | RAM (GB) | On-Demand | 1-yr Reserved | 3-yr Reserved |
|---|---|---|---|---|---|
| db.r3.4xlarge | 16 | 122 | $1,380 | — | — |
| db.r4.4xlarge | 16 | 122 | $1,402 | — | — |
| db.r5.4xlarge | 16 | 128 | $1,402 | $756 | $508 |
| db.r5b.4xlarge | 16 | 128 | $1,729 | $932 | $621 |
| db.r5d.4xlarge | 16 | 128 | $1,669 | — | — |
| db.r6g.4xlarge | 16 | 128 | $1,254 | $676 | $455 |
| db.r6gd.4xlarge | 16 | 128 | $1,502 | $1,096 | $796 |
| db.r6i.4xlarge | 16 | 128 | $1,402 | $755 | $508 |
| db.r6id.4xlarge | 16 | 128 | $1,742 | $1,271 | $923 |
| db.r6idn.4xlarge | 16 | 128 | $2,264 | $1,653 | $1,200 |
| db.r6in.4xlarge | 16 | 128 | $2,020 | $1,475 | $1,071 |
| db.r7g.4xlarge | 16 | 128 | $1,396 | $1,019 | $740 |
| db.r7i.4xlarge | 16 | 128 | $1,460 | $920 | — |
| db.r8g.4xlarge | 16 | 128 | $1,396 | $880 | — |
| db.r8gd.4xlarge | 16 | 128 | $1,594 | — | — |