db.m8g.xlargevsdb.m9g.xlarge

db.m8g.xlarge is 8% cheaper than db.m9g.xlarge on demand in US East (N. Virginia), saving $21.90 a month.

At a glancedb.m8g.xlargedb.m9g.xlarge
On-demand$0.336/hr8% less$0.366/hr
Lowest rate$0.2688/hr8% less1-yr savings plan, hourly commitment$0.2928/hr1-yr savings plan, hourly commitment
Size4 vCPUs, 16 GiB4 vCPUs, 16 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.m9g.xlargedb.m9g.xlarge vs db.m8g.xlarge
On-demandPay by the hour$0.336$0.366▲ 9%
1-yr reservedNo upfront33% off$0.225——
3-yr reservedNo upfront53% off$0.1579——
1-yr savings planHourly commitment20% off$0.268820% off$0.2928▲ 9%

Key differences

The biggest lead each one has.

Where db.m8g.xlarge leads
On-demand price$0.336 vs $0.366 per hour
8% cheaper
Where db.m9g.xlarge leads
Network peak15 Gbps vs 12.5 Gbps
20% higher
EBS baseline bandwidth1,500 Mbps vs 1,250 Mbps
20% higher
Sustained clock3.3 GHz vs 2.8 GHz
18% higher

Specs

16 of 24 specs differ. Those are in bold.

Compute2 of 8 differdb.m8g.xlargedb.m9g.xlarge
vCPUs44
Physical cores44
Threads per core11
Architecturearm64arm64
ProcessorAWS Graviton4–
CPU makerAWSAWS
Sustained clock2.8 GHz3.3 GHz
BurstableNoNo
MemoryAll 1 matchdb.m8g.xlargedb.m9g.xlarge
Memory (GiB)1616
Networking3 of 3 differdb.m8g.xlargedb.m9g.xlarge
NetworkUp to 12.5 Gigabit–
Network baseline1.875 Gbps2.1 Gbps
Network peak12.5 Gbps15 Gbps
Storage6 of 7 differdb.m8g.xlargedb.m9g.xlarge
StorageEBS Only–
EBS baseline bandwidth1,250 Mbps1,500 Mbps
EBS max bandwidth10,000 Mbps12,000 Mbps
EBS baseline throughput156.25 MB/s187.5 MB/s
EBS max throughput1,250 MB/s1,500 MB/s
EBS baseline IOPS6,0006,000
EBS max IOPS40,00048,000
Instance details4 of 4 differdb.m8g.xlargedb.m9g.xlarge
Familym8gm9g
CategoryGeneral purpose–
Current generationYes–
Normalization factor168
Other1 of 1 differdb.m8g.xlargedb.m9g.xlarge
Hardware Basism8g.xlargem9g.xlarge

On-demand prices by region

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

Regiondb.m8g.xlargedb.m9g.xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$0.336$0.366▲ 9%
US East (Ohio)us-east-2$0.336$0.366▲ 9%
US West (Oregon)us-west-2$0.336$0.366▲ 9%
EU (Frankfurt)eu-central-1$0.4$0.436▲ 9%

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.r8g.xlargedb.m8a.xlargedb.m8gd.xlargedb.m7g.xlarge
db.m9g.xlargem9g family
db.m9g.xlarge prices and specsEvery size in the m9g family

Compare db.m9g.xlarge with

db.t4g.xlarge

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.