db.m8a.16xlargevsdb.r8a.16xlarge

db.m8a.16xlarge is 29% cheaper than db.r8a.16xlarge on demand in US East (N. Virginia), saving $2,032.32 a month. Per vCPU, db.r8a.16xlarge costs 30% less.

At a glancedb.m8a.16xlargedb.r8a.16xlarge
On-demand$6.877/hr29% less$9.661/hr
Lowest rate$5.501/hr29% less1-yr savings plan, hourly commitment$7.729/hr1-yr savings plan, hourly commitment
Size32 vCPUs, 256 GiB64 vCPUs, 512 GiB
Processor5th Generation AMD EPYC5th Generation AMD EPYC
Architecturex86_64x86_64

Prices in US East (N. Virginia)

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

Optiondb.m8a.16xlargedb.r8a.16xlargedb.r8a.16xlarge vs db.m8a.16xlarge
On-demandPay by the hour$6.877$9.661▲ 40%
1-yr savings planHourly commitment20% off$5.50120% off$7.729▲ 40%

Key differences

The biggest lead each one has.

Where db.m8a.16xlarge leads
On-demand price$6.877 vs $9.661 per hour
29% cheaper
Where db.r8a.16xlarge leads
vCPUs64 vs 32
2× higher
Memory (GiB)512 vs 256
2× higher

Specs

6 of 24 specs differ. Those are in bold.

Compute1 of 8 differdb.m8a.16xlargedb.r8a.16xlarge
vCPUs3264
Physical cores6464
Threads per core11
Architecturex86_64x86_64
Processor5th Generation AMD EPYC5th Generation AMD EPYC
CPU makerAMDAMD
Sustained clock4.5 GHz4.5 GHz
BurstableNoNo
Memory1 of 1 differdb.m8a.16xlargedb.r8a.16xlarge
Memory (GiB)256512
NetworkingAll 3 matchdb.m8a.16xlargedb.r8a.16xlarge
Network30000 Mbps30000 Mbps
Network baseline30 Gbps30 Gbps
Network peak30 Gbps30 Gbps
StorageAll 7 matchdb.m8a.16xlargedb.r8a.16xlarge
StorageEBS OnlyEBS Only
EBS baseline bandwidth20,000 Mbps20,000 Mbps
EBS max bandwidth20,000 Mbps20,000 Mbps
EBS baseline throughput2,500 MB/s2,500 MB/s
EBS max throughput2,500 MB/s2,500 MB/s
EBS baseline IOPS80,00080,000
EBS max IOPS80,00080,000
Instance details3 of 4 differdb.m8a.16xlargedb.r8a.16xlarge
Familym8ar8a
CategoryGeneral purposeMemory optimized
Current generationYesYes
Normalization factor–256
Other1 of 1 differdb.m8a.16xlargedb.r8a.16xlarge
Hardware Basism8a.16xlarger8a.16xlarge

On-demand prices by region

Cheapest for db.m8a.16xlarge first. PostgreSQL, USD per hour.

Regiondb.m8a.16xlargedb.r8a.16xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$6.877$9.661▲ 40%
US East (Ohio)us-east-2$6.877$9.661▲ 40%
US West (Oregon)us-west-2$6.877$9.661▲ 40%
EU (Ireland)eu-west-1$7.613$10.819▲ 42%
Europe (Spain)eu-south-2$7.613$10.819▲ 42%
EU (Frankfurt)eu-central-1$8.192$11.786▲ 44%
Asia Pacific (Tokyo)ap-northeast-1$9.546$11.594▲ 21%

Keep exploring

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

db.m8a.16xlargeGeneral purpose, m8a family
db.m8a.16xlarge prices and specsEvery size in the m8a family

Compare db.m8a.16xlarge with

db.m8g.16xlargedb.m8i.16xlarge
db.r8a.16xlargeMemory optimized, r8a family
db.r8a.16xlarge prices and specsEvery size in the r8a family

Compare db.r8a.16xlarge with

db.r8i.16xlargedb.r8g.16xlarge

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.