db.r5.xlargevsdb.r5b.xlarge

db.r5.xlarge is 16% cheaper than db.r5b.xlarge on demand in US East (N. Virginia), saving $67.16 a month.

At a glancedb.r5.xlargedb.r5b.xlarge
On-demand$0.5/hr16% less$0.592/hr
Lowest rate$0.2888/hr16% less1-yr reserved, no upfront$0.3429/hr1-yr reserved, no upfront
Size4 vCPUs, 32 GiB4 vCPUs, 32 GiB

Prices in US East (N. Virginia)

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

Optiondb.r5.xlargedb.r5b.xlargedb.r5b.xlarge vs db.r5.xlarge
On-demandPay by the hour$0.5$0.592▲ 18%
1-yr reservedNo upfront42% off$0.288842% off$0.3429▲ 19%

Key differences

The biggest lead each one has.

Where db.r5.xlarge leads
On-demand price$0.5 vs $0.592 per hour
16% cheaper
Where db.r5b.xlarge leads
EBS max IOPS43,333 vs 18,750
2.3× higher

Specs

15 of 26 specs differ. Those are in bold.

Compute3 of 9 differdb.r5.xlargedb.r5b.xlarge
vCPUs44
Physical cores22
Threads per core22
Architecture–x86_64
Processor–Intel Xeon Platinum 8000 series
CPU makerIntelIntel
Clock speed–Up to 3.1 GHz
Sustained clock3.1 GHz3.1 GHz
BurstableNoNo
MemoryAll 1 matchdb.r5.xlargedb.r5b.xlarge
Memory (GiB)3232
Networking1 of 3 differdb.r5.xlargedb.r5b.xlarge
Network–Up to 10 Gigabit
Network baseline1.25 Gbps1.25 Gbps
Network peak10 Gbps10 Gbps
Storage7 of 8 differdb.r5.xlargedb.r5b.xlarge
StorageEBS OnlyEBS Only
EBS throughput–312 Mbps
EBS baseline bandwidth1,150 Mbps2,500 Mbps
EBS max bandwidth4,750 Mbps10,000 Mbps
EBS baseline throughput143.75 MB/s312.5 MB/s
EBS max throughput593.75 MB/s1,250 MB/s
EBS baseline IOPS6,00010,833
EBS max IOPS18,75043,333
Instance details3 of 4 differdb.r5.xlargedb.r5b.xlarge
Familyr5r5b
CategoryMemory optimizedMemory optimized
Current generation–Yes
Normalization factor16–
Other1 of 1 differdb.r5.xlargedb.r5b.xlarge
Hardware Basisr5.xlarger5b.xlarge

On-demand prices by region

Cheapest for db.r5.xlarge first. PostgreSQL, USD per hour.

Regiondb.r5.xlargedb.r5b.xlargeDifference
US East (N. Virginia)Used in summaryus-east-1$0.5$0.592▲ 18%
US East (Ohio)us-east-2$0.5$0.592▲ 18%
US West (Oregon)us-west-2$0.5$0.592▲ 18%
EU (Stockholm)eu-north-1$0.515$0.584▲ 13%
Canada (Central)ca-central-1$0.5405$0.603▲ 12%
EU (Ireland)eu-west-1$0.56$0.618▲ 10%
EU (London)eu-west-2$0.588$0.648▲ 10%
EU (Milan)eu-south-1$0.588$0.648▲ 10%
Asia Pacific (Seoul)ap-northeast-2$0.6$0.659▲ 10%
Asia Pacific (Singapore)ap-southeast-1$0.6$0.702▲ 17%
Asia Pacific (Sydney)ap-southeast-2$0.6$0.67▲ 12%
Asia Pacific (Tokyo)ap-northeast-1$0.6$0.714▲ 19%
EU (Frankfurt)eu-central-1$0.61$0.714▲ 17%
South America (Sao Paulo)sa-east-1$1.047$0.877▼ 16%

Keep exploring

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

db.r5.xlargeMemory optimized, r5 family
db.r5.xlarge prices and specsEvery size in the r5 family

Compare db.r5.xlarge with

db.m5.xlargedb.r5d.xlargedb.r5b.xlarge.tpc2.mem2xdb.r5b.xlarge.tpc2.mem4xdb.r4.xlargedb.r6i.xlargedb.r6i.xlarge.tpc2.mem2xdb.r6i.xlarge.tpc2.mem4x
db.r5b.xlargeMemory optimized, r5b family
db.r5b.xlarge prices and specsEvery size in the r5b family

Compare db.r5b.xlarge with

db.r5.xlarge.tpc2.mem2xdb.r5.xlarge.tpc2.mem4x

Pay the committed rate, with commitment protection

The best committed rate on these two is 42% 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.