db.m8a.8xlargevsdb.r8a.8xlarge

db.m8a.8xlarge is 29% cheaper than db.r8a.8xlarge on demand in US East (N. Virginia), saving $1,016.16 a month. Per vCPU, db.m8a.8xlarge costs 64% less.

At a glancedb.m8a.8xlargedb.r8a.8xlarge
On-demand$3.438/hr29% less$4.83/hr
Lowest rate$2.751/hr29% less1-yr savings plan, hourly commitment$3.864/hr1-yr savings plan, hourly commitment
Size32 vCPUs, 128 GiB16 vCPUs, 256 GiB

Prices in US East (N. Virginia)

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

Optiondb.m8a.8xlargedb.r8a.8xlargedb.r8a.8xlarge vs db.m8a.8xlarge
On-demandPay by the hour$3.438$4.83▲ 40%
1-yr savings planHourly commitment20% off$2.75120% off$3.864▲ 40%

Key differences

The biggest lead each one has.

Where db.m8a.8xlarge leads
On-demand price$3.438 vs $4.83 per hour
29% cheaper
vCPUs32 vs 16
2× higher
Where db.r8a.8xlarge leads
Memory (GiB)256 vs 128
2× higher

Specs

10 of 23 specs differ. Those are in bold.

Compute3 of 8 differdb.m8a.8xlargedb.r8a.8xlarge
vCPUs3216
Physical cores3232
Threads per core11
Architecture–x86_64
Processor–5th Generation AMD EPYC
CPU makerAMDAMD
Sustained clock4.5 GHz4.5 GHz
BurstableNoNo
Memory1 of 1 differdb.m8a.8xlargedb.r8a.8xlarge
Memory (GiB)128256
Networking1 of 3 differdb.m8a.8xlargedb.r8a.8xlarge
Network–15000 Mbps
Network baseline15 Gbps15 Gbps
Network peak15 Gbps15 Gbps
Storage1 of 7 differdb.m8a.8xlargedb.r8a.8xlarge
Storage–EBS Only
EBS baseline bandwidth10,000 Mbps10,000 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput1,250 MB/s1,250 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS40,00040,000
EBS max IOPS40,00040,000
Instance details3 of 3 differdb.m8a.8xlargedb.r8a.8xlarge
Familym8ar8a
Category–Memory optimized
Current generation–Yes
Other1 of 1 differdb.m8a.8xlargedb.r8a.8xlarge
Hardware Basism8a.8xlarger8a.8xlarge

On-demand prices by region

Cheapest for db.m8a.8xlarge first. PostgreSQL, USD per hour.

Regiondb.m8a.8xlargedb.r8a.8xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$3.438$4.83▲ 40%
US East (Ohio)us-east-2$3.438$4.83▲ 40%
US West (Oregon)us-west-2$3.438$4.83▲ 40%
EU (Ireland)eu-west-1$3.806$5.41▲ 42%
Europe (Spain)eu-south-2$3.806$5.41▲ 42%
EU (Frankfurt)eu-central-1$4.096$5.893▲ 44%
Asia Pacific (Tokyo)ap-northeast-1$4.773$5.797▲ 21%

Keep exploring

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

db.m8a.8xlargem8a family
db.m8a.8xlarge prices and specsEvery size in the m8a family

Compare db.m8a.8xlarge with

db.m8g.8xlargedb.m8i.8xlarge
db.r8a.8xlargeMemory optimized, r8a family
db.r8a.8xlarge prices and specsEvery size in the r8a family

Compare db.r8a.8xlarge with

db.r8i.8xlargedb.r8g.8xlarge

Pay the committed rate, with commitment protection

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

Connect AWS account

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