db.m8a.4xlargevsdb.r8a.4xlarge

db.m8a.4xlarge is 29% cheaper than db.r8a.4xlarge on demand in US East (N. Virginia), saving $508.08 a month.

At a glancedb.m8a.4xlargedb.r8a.4xlarge
On-demand$1.719/hr29% less$2.415/hr
Lowest rate$1.375/hr29% less1-yr savings plan, hourly commitment$1.932/hr1-yr savings plan, hourly commitment
Size8 vCPUs, 64 GiB8 vCPUs, 128 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.4xlargedb.r8a.4xlargedb.r8a.4xlarge vs db.m8a.4xlarge
On-demandPay by the hour$1.719$2.415▲ 40%
1-yr savings planHourly commitment20% off$1.37520% off$1.932▲ 40%

Key differences

The biggest lead each one has.

Where db.m8a.4xlarge leads
On-demand price$1.719 vs $2.415 per hour
29% cheaper
Where db.r8a.4xlarge leads
Memory (GiB)128 vs 64
2× higher

Specs

4 of 23 specs differ. Those are in bold.

ComputeAll 8 matchdb.m8a.4xlargedb.r8a.4xlarge
vCPUs88
Physical cores1616
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.4xlargedb.r8a.4xlarge
Memory (GiB)64128
NetworkingAll 3 matchdb.m8a.4xlargedb.r8a.4xlarge
NetworkUp to 15000 MbpsUp to 15000 Mbps
Network baseline7.5 Gbps7.5 Gbps
Network peak15 Gbps15 Gbps
StorageAll 7 matchdb.m8a.4xlargedb.r8a.4xlarge
StorageEBS OnlyEBS Only
EBS baseline bandwidth5,000 Mbps5,000 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput625 MB/s625 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS20,00020,000
EBS max IOPS40,00040,000
Instance details2 of 3 differdb.m8a.4xlargedb.r8a.4xlarge
Familym8ar8a
CategoryGeneral purposeMemory optimized
Current generationYesYes
Other1 of 1 differdb.m8a.4xlargedb.r8a.4xlarge
Hardware Basism8a.4xlarger8a.4xlarge

On-demand prices by region

Cheapest for db.m8a.4xlarge first. PostgreSQL, USD per hour.

Regiondb.m8a.4xlargedb.r8a.4xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$1.719$2.415▲ 40%
US East (Ohio)us-east-2$1.719$2.415▲ 40%
US West (Oregon)us-west-2$1.719$2.415▲ 40%
EU (Ireland)eu-west-1$1.903$2.705▲ 42%
Europe (Spain)eu-south-2$1.903$2.705▲ 42%
EU (Frankfurt)eu-central-1$2.048$2.946▲ 44%
Asia Pacific (Tokyo)ap-northeast-1$2.386$2.898▲ 21%

Keep exploring

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

db.m8a.4xlargeGeneral purpose, m8a family
db.m8a.4xlarge prices and specsEvery size in the m8a family

Compare db.m8a.4xlarge with

db.m8g.4xlargedb.m8i.4xlarge
db.r8a.4xlargeMemory optimized, r8a family
db.r8a.4xlarge prices and specsEvery size in the r8a family

Compare db.r8a.4xlarge with

db.r8i.4xlargedb.r8g.4xlarge

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.