Instances›AWS EC2›r6a›r6a.large
Compute
vCPUs2
Memory16 GiB
Mem / vCPU8.00 GiB
ProcessorEPYC 7R13 Processor
Clock speed3.6 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth10,000 Mbps
Throughput1250 MB/s
IOPS40,000
Networking
PerformanceUp to 12.5 Gigabit
Max ENIs3
IPv6Yes
GPUNone
Family sizes
r6a.large2 vCPU · 16 GiB
r6a.xlarge4 vCPU · 32 GiB
r6a.2xlarge8 vCPU · 64 GiB
r6a.4xlarge16 vCPU · 128 GiB
r6a.8xlarge32 vCPU · 256 GiB
r6a.12xlarge48 vCPU · 384 GiB
r6a.16xlarge64 vCPU · 512 GiB
r6a.24xlarge96 vCPU · 768 GiB
r6a.32xlarge128 vCPU · 1024 GiB
r6a.48xlarge192 vCPU · 1536 GiB
r6a.metal192 vCPU · 1536 GiB
r6a.large

The r6a.large pairs 2 vCPU with 16 GiB of RAM, the 8.00 GiB-per-vCPU ratio that marks a memory-optimized instance. In the name, "r" stands for RAM, "6" is the generation, "a" marks AMD processors and "large" is the size within the r6a family. It runs on AMD EPYC 7R13 Processor at 3.6 GHz, and AWS introduced it in July 2022. AWS has since shipped r7a, r8a and r9g; r7a.large is the direct replacement at this size, scoring 65,782 CoreMark/s against this instance's 42,317 — roughly 55% more throughput for the same vCPU count. mh.vs2.medium on Rackspace Spot lines up one-for-one: 2 vCPU and 16 GiB, about 90% below the US East (N. Virginia) on-demand rate.

Pricing by region
1 hr
RegionAWS on-demandAWS Spot1-yr Reserved3-yr ReservedRackspace SpotYou save
US East, N. Virginia$0.113$0.045$0.075$0.051$0.011
$0.102 savings
US Central, Chicagono AWS region$0.021
US Central, Dallasno AWS region$0.041
Hong Kong$0.002
Sydney, Australia$0.136$0.054$0.090$0.062$0.011
$0.125 savings
London, UK$0.133$0.042$0.088$0.060$0.011
$0.122 savings
US West, San Jose$0.126$0.042$0.083$0.057$0.031
$0.095 savings
US Central, Dallas 2no AWS region$0.031
When to use it
Good for
  • ●Database instances that keep the working set in RAM
  • ●Graph and search workloads with large indexes
  • ●In-memory caches such as Redis and Memcached
  • ●Workloads that fit inside 16 GiB of RAM
  • ●Small, steady services that do not need more than 2 vCPU
  • ●Network-heavy services — AWS rates this size at Up to 12.5 Gigabit
Avoid if
  • ●Starting a new deployment. r7a.large is the newer generation at this size.
  • ●The working set needs more than 16 GiB of RAM
  • ●Local NVMe or instance-store disk is a hard requirement
  • ●GPU or FPGA acceleration is needed
  • ●CPU-bound work. You are paying for memory this workload will not use.
  • ●More than 8.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
$83/mo on AWS on-demand against $8/mo on Rackspace Spot for the equivalent — market-priced, not list-priced.
  • Spot sells spare capacity at market prices. It is the cheapest compute on the internet.
  • Prices are set by supply and demand. You pay what the market decides.
  • Compute is delivered as fully managed Kubernetes. All infrastructure is taken care of.
  • Egress costs $0.01/GB after the free allowance. AWS charges $0.09/GB.
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