db.m8g.xlargevsdb.r8g.xlarge

db.m8g.xlarge is 30% cheaper than db.r8g.xlarge on demand in US East (N. Virginia), saving $103.66 a month.

At a glancedb.m8g.xlargedb.r8g.xlarge
On-demand$0.336/hr30% less$0.478/hr
Lowest rate$0.1579/hr30% less3-yr reserved, no upfront$0.2246/hr3-yr reserved, no upfront
Size4 vCPUs, 16 GiB4 vCPUs, 32 GiB
Architecturearm64arm64

Prices in US East (N. Virginia)

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

Optiondb.m8g.xlargedb.r8g.xlargedb.r8g.xlarge vs db.m8g.xlarge
On-demandPay by the hour$0.336$0.478▲ 42%
1-yr reservedNo upfront33% off$0.22533% off$0.32▲ 42%
3-yr reservedNo upfront53% off$0.157953% off$0.2246▲ 42%
1-yr savings planHourly commitment20% off$0.268820% off$0.3824▲ 42%

Key differences

The biggest lead each one has.

Where db.m8g.xlarge leads
On-demand price$0.336 vs $0.478 per hour
30% cheaper
Where db.r8g.xlarge leads
Memory (GiB)32 vs 16
2× higher

Specs

9 of 24 specs differ. Those are in bold.

Compute1 of 8 differdb.m8g.xlargedb.r8g.xlarge
vCPUs44
Physical cores44
Threads per core11
Architecturearm64arm64
ProcessorAWS Graviton4–
CPU makerAWSAWS
Sustained clock2.8 GHz2.8 GHz
BurstableNoNo
Memory1 of 1 differdb.m8g.xlargedb.r8g.xlarge
Memory (GiB)1632
Networking1 of 3 differdb.m8g.xlargedb.r8g.xlarge
NetworkUp to 12.5 Gigabit–
Network baseline1.875 Gbps1.875 Gbps
Network peak12.5 Gbps12.5 Gbps
Storage1 of 7 differdb.m8g.xlargedb.r8g.xlarge
StorageEBS Only–
EBS baseline bandwidth1,250 Mbps1,250 Mbps
EBS max bandwidth10,000 Mbps10,000 Mbps
EBS baseline throughput156.25 MB/s156.25 MB/s
EBS max throughput1,250 MB/s1,250 MB/s
EBS baseline IOPS6,0006,000
EBS max IOPS40,00040,000
Instance details4 of 4 differdb.m8g.xlargedb.r8g.xlarge
Familym8gr8g
CategoryGeneral purpose–
Current generationYes–
Normalization factor168
Other1 of 1 differdb.m8g.xlargedb.r8g.xlarge
Hardware Basism8g.xlarger8g.xlarge

On-demand prices by region

Cheapest for db.m8g.xlarge first. PostgreSQL, USD per hour.

Regiondb.m8g.xlargedb.r8g.xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$0.336$0.478▲ 42%
US East (Ohio)us-east-2$0.336$0.478▲ 42%
US West (Oregon)us-west-2$0.336$0.478▲ 42%
EU (Stockholm)eu-north-1$0.354$0.49▲ 38%
EU (Ireland)eu-west-1$0.372$0.536▲ 44%
Europe (Spain)eu-south-2$0.372$0.536▲ 44%
US West (N. California)us-west-1$0.384$0.536▲ 40%
EU (London)eu-west-2$0.39$0.561▲ 44%
EU (Paris)eu-west-3$0.39$0.561▲ 44%
Asia Pacific (Malaysia)ap-southeast-5$0.398$0.488▲ 23%
EU (Frankfurt)eu-central-1$0.4$0.582▲ 45%
Europe (Zurich)eu-central-2$0.442$0.64▲ 45%
Asia Pacific (Singapore)ap-southeast-1$0.468$0.574▲ 23%
Asia Pacific (Sydney)ap-southeast-2$0.468$0.574▲ 23%
Asia Pacific (Tokyo)ap-northeast-1$0.468$0.574▲ 23%
Asia Pacific (Seoul)ap-northeast-2$0.4688$0.574▲ 22%
Asia Pacific (Mumbai)ap-south-1$0.479$0.544▲ 14%
Asia Pacific (Hyderabad)ap-south-2$0.48$0.544▲ 13%
Asia Pacific (Hong Kong)ap-east-1$0.516$0.631▲ 22%
South America (Sao Paulo)sa-east-1$0.5342$0.76▲ 42%

Keep exploring

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

db.m8g.xlargeGeneral purpose, m8g family
db.m8g.xlarge prices and specsEvery size in the m8g family

Compare db.m8g.xlarge with

db.m8i.xlargedb.t4g.xlargedb.m8a.xlargedb.m8gd.xlargedb.m7g.xlargedb.m9g.xlarge
db.r8g.xlarger8g family
db.r8g.xlarge prices and specsEvery size in the r8g family

Compare db.r8g.xlarge with

db.r8gd.xlargedb.r8i.xlargedb.r8a.xlargedb.r7g.xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 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.