db.m6id.4xlargevsdb.r6id.4xlarge

db.m6id.4xlarge is 25% cheaper than db.r6id.4xlarge on demand in US East (N. Virginia), saving $432.16 a month.

At a glancedb.m6id.4xlargedb.r6id.4xlarge
On-demand$1.794/hr25% less$2.386/hr
Lowest rate$1.381/hr25% less1-yr reserved, no upfront$1.837/hr1-yr reserved, no upfront
Size16 vCPUs, 64 GiB16 vCPUs, 128 GiB

Prices in US East (N. Virginia)

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

Optiondb.m6id.4xlargedb.r6id.4xlargedb.r6id.4xlarge vs db.m6id.4xlarge
On-demandPay by the hour$1.794$2.386▲ 33%
1-yr reservedNo upfront23% off$1.38123% off$1.837▲ 33%

Key differences

The biggest lead each one has.

Where db.m6id.4xlarge leads
On-demand price$1.794 vs $2.386 per hour
25% cheaper
Where db.r6id.4xlarge leads
Memory (GiB)128 vs 64
2× higher

Specs

9 of 25 specs differ. Those are in bold.

Compute2 of 8 differdb.m6id.4xlargedb.r6id.4xlarge
vCPUs1616
Physical cores88
Threads per core22
Architecture–x86_64
Processor–Intel Xeon 8375
CPU makerIntelIntel
Sustained clock3.5 GHz3.5 GHz
BurstableNoNo
Memory1 of 1 differdb.m6id.4xlargedb.r6id.4xlarge
Memory (GiB)64128
Networking1 of 3 differdb.m6id.4xlargedb.r6id.4xlarge
Network–Up to 12.5 Gbps
Network baseline6.25 Gbps6.25 Gbps
Network peak12.5 Gbps12.5 Gbps
Storage1 of 8 differdb.m6id.4xlargedb.r6id.4xlarge
Storage–1 x 950 NVMe SSD
Local disks1 × 950 GB SSD1 × 950 GB SSD
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 details3 of 4 differdb.m6id.4xlargedb.r6id.4xlarge
Familym6idr6id
Category–Memory optimized
Current generation–Yes
Normalization factor3232
Other1 of 1 differdb.m6id.4xlargedb.r6id.4xlarge
Hardware Basism6id.4xlarger6id.4xlarge

On-demand prices by region

Cheapest for db.m6id.4xlarge first. PostgreSQL, USD per hour.

Regiondb.m6id.4xlargedb.r6id.4xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$1.794$2.386▲ 33%
US East (Ohio)us-east-2$1.794$2.386▲ 33%
US West (Oregon)us-west-2$1.794$2.386▲ 33%
Mexico (Central)mx-central-1$1.88$2.504▲ 33%
Canada West (Calgary)ca-west-1$1.971$2.622▲ 33%
EU (Ireland)eu-west-1$1.981$2.653▲ 34%
EU (Frankfurt)eu-central-1$2.144$2.895▲ 35%
Asia Pacific (Malaysia)ap-southeast-5$2.232$2.568▲ 15%
Asia Pacific (Thailand)ap-southeast-7$2.232$2.568▲ 15%
Asia Pacific (Taipei)ap-east-2$2.24$2.576▲ 15%
Asia Pacific (Tokyo)ap-northeast-1$2.485$2.861▲ 15%
Asia Pacific (Sydney)ap-southeast-2$2.494$2.886▲ 16%
Asia Pacific (New Zealand)ap-southeast-6$2.621$3.032▲ 16%

Keep exploring

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

db.m6id.4xlargem6id family
db.m6id.4xlarge prices and specsEvery size in the m6id family

Compare db.m6id.4xlarge with

db.m6i.4xlargedb.m6gd.4xlargedb.m5d.4xlarge
db.r6id.4xlargeMemory optimized, r6id family
db.r6id.4xlarge prices and specsEvery size in the r6id family

Compare db.r6id.4xlarge with

db.r6i.4xlargedb.r6i.4xlarge.tpc2.mem2xdb.r6i.4xlarge.tpc2.mem3xdb.r6i.4xlarge.tpc2.mem4xdb.r6gd.4xlargedb.r6i.4xlarge.tpc2.mem8xdb.r5d.4xlarge

Pay the committed rate, with commitment protection

The best committed rate on these two is 23% 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.