Instances›AWS EC2›r8ib›r8ib.large
Compute
vCPUs2
Memory16 GiB
Mem / vCPU8.00 GiB
ProcessorXeon Scalable
Clock speed3.9 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth25,000 Mbps
Throughput3125 MB/s
IOPS120,000
Networking
PerformanceUp to 16.66 Gigabit
Max ENIs4
IPv6Yes
GPUNone
Family sizes
r8ib.large2 vCPU · 16 GiB
r8ib.xlarge4 vCPU · 32 GiB
r8ib.2xlarge8 vCPU · 64 GiB
r8ib.4xlarge16 vCPU · 128 GiB
r8ib.8xlarge32 vCPU · 256 GiB
r8ib.12xlarge48 vCPU · 384 GiB
r8ib.16xlarge64 vCPU · 512 GiB
r8ib.24xlarge96 vCPU · 768 GiB
r8ib.32xlarge128 vCPU · 1024 GiB
r8ib.48xlarge192 vCPU · 1536 GiB
r8ib.metal-48xl192 vCPU · 1536 GiB
r8ib.96xlarge384 vCPU · 3072 GiB
r8ib.metal-96xl384 vCPU · 3072 GiB
r8ib.large

The r8ib.large is a memory-optimized AWS EC2 instance: 2 vCPU and 16 GiB of memory, 8.00 GiB per vCPU. In the name, "r" stands for RAM, "8" is the generation, "ib" marks Intel processors and block-storage optimisation and "large" is the size within the r8ib family. It runs on Intel Xeon Scalable (Granite Rapids) at 3.9 GHz, and AWS introduced it in April 2026. AWS has since shipped r9g; r9g.large is the direct replacement at this size. Rackspace Spot's mh.vs2.medium is a like-for-like substitute at 2 vCPU and 16 GiB, about 95% 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$0.209$0.061$0.011
$0.198 savings
US Central, Chicagono AWS region$0.021
US Central, Dallasno AWS region$0.041
Hong Kong$0.002
Sydney, Australia$0.011
London, UK$0.011
US West, San Jose$0.251$0.074$0.031
$0.220 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 16.66 Gigabit
Avoid if
  • ●The working set needs more than 16 GiB of RAM
  • ●More than 8.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
  • ●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.
$153/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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