db.r8a.largevsdb.r8g.large

db.r8g.large is 21% cheaper than db.r8a.large on demand in US East (N. Virginia), saving $45.92 a month.

At a glancedb.r8a.largedb.r8g.large
On-demand$0.3019/hr$0.239/hr21% less
Lowest rate$0.2415/hr1-yr savings plan, hourly commitment$0.1912/hr21% less1-yr savings plan, hourly commitment
Size2 vCPUs, 16 GiB2 vCPUs, 16 GiB

Prices in US East (N. Virginia)

“Off” is the discount against each type’s own on-demand price. PostgreSQL, USD per hour.

Optiondb.r8a.largedb.r8g.largedb.r8g.large vs db.r8a.large
On-demandPay by the hour$0.3019$0.239▼ 21%
1-yr reservedNo upfront—33% off$0.16—
3-yr reservedNo upfront—53% off$0.1123—
1-yr savings planHourly commitment20% off$0.241520% off$0.1912▼ 21%

Key differences

The biggest lead each one has.

Where db.r8a.large leads
Sustained clock4.5 GHz vs 2.8 GHz
61% higher
EBS baseline bandwidth650 Mbps vs 630 Mbps
3% higher
Where db.r8g.large leads
On-demand price$0.239 vs $0.3019 per hour
21% cheaper

Specs

13 of 24 specs differ. Those are in bold.

Compute4 of 8 differdb.r8a.largedb.r8g.large
vCPUs22
Physical cores22
Threads per core11
Architecture–arm64
Processor–AWS Graviton4
CPU makerAMDAWS
Sustained clock4.5 GHz2.8 GHz
BurstableNoNo
MemoryAll 1 matchdb.r8a.largedb.r8g.large
Memory (GiB)1616
Networking1 of 3 differdb.r8a.largedb.r8g.large
Network–Up to 12.5 Gigabit
Network baseline0.937 Gbps0.937 Gbps
Network peak12.5 Gbps12.5 Gbps
Storage3 of 7 differdb.r8a.largedb.r8g.large
Storage–Aurora IO Optimization Mode
EBS baseline bandwidth650 Mbps630 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput81.25 MB/s78.75 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS3,6003,600
EBS max IOPS40,00040,000
Instance details4 of 4 differdb.r8a.largedb.r8g.large
Familyr8ar8g
Category–Memory optimized
Current generation–Yes
Normalization factor45.2
Other1 of 1 differdb.r8a.largedb.r8g.large
Hardware Basisr8a.larger8g.large

On-demand prices by region

Cheapest for db.r8a.large first. PostgreSQL, USD per hour.

Regiondb.r8a.largedb.r8g.largeDifference
US East (N. Virginia)Used in summaryus-east-1$0.3019$0.239▼ 21%
US East (Ohio)us-east-2$0.3019$0.239▼ 21%
US West (Oregon)us-west-2$0.3019$0.239▼ 21%
Canada (Central)ca-central-1$0.326$0.258▼ 21%
EU (Ireland)eu-west-1$0.3381$0.268▼ 21%
Europe (Spain)eu-south-2$0.3381$0.268▼ 21%
Asia Pacific (Tokyo)ap-northeast-1$0.3623$0.287▼ 21%
EU (Frankfurt)eu-central-1$0.3683$0.291▼ 21%

Keep exploring

Each type’s own page, and how it compares with others.

db.r8a.larger8a family
db.r8a.large prices and specsEvery size in the r8a family

Compare db.r8a.large with

db.r8i.largedb.m8a.large
db.r8g.largeMemory optimized, r8g family
db.r8g.large prices and specsEvery size in the r8g family

Compare db.r8g.large with

db.m8g.largedb.r8gd.largedb.r8i.largedb.r7g.large

Pay the committed rate, with commitment protection

The best committed rate on these two is 20–53% below on-demand. Connect your cloud accounts to unlock greater savings with commitment protection.

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AWS RDS PostgreSQL prices in USD. Monthly figures use 730 hours. Prices last updated 12 Nov 2026.