Instances›AWS EC2›m6i›m6i.4xlarge
Compute
vCPUs16
Memory64 GiB
Mem / vCPU4.00 GiB
ProcessorXeon 8375C
Clock speed3.5 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth10,000 Mbps
Throughput1250 MB/s
IOPS40,000
Networking
PerformanceUp to 12.5 Gigabit
Max ENIs8
IPv6Yes
GPUNone
Family sizes
m6i.large2 vCPU · 8 GiB
m6i.xlarge4 vCPU · 16 GiB
m6i.2xlarge8 vCPU · 32 GiB
m6i.4xlarge16 vCPU · 64 GiB
m6i.8xlarge32 vCPU · 128 GiB
m6i.12xlarge48 vCPU · 192 GiB
m6i.16xlarge64 vCPU · 256 GiB
m6i.24xlarge96 vCPU · 384 GiB
m6i.32xlarge128 vCPU · 512 GiB
m6i.metal128 vCPU · 512 GiB
m6i.4xlarge

m6i.4xlarge is AWS's general-purpose EC2 size at 16 vCPU and 64 GiB. In the name, "m" is the general-purpose line, "6" is the generation, "i" marks Intel processors and "4xlarge" is the size within the m6i family. It runs on Intel Xeon 8375C (Ice Lake) at 3.5 GHz, and AWS introduced it in August 2021. AWS has since shipped m7i, m8i and m9g; m7i.4xlarge is the direct replacement at this size, scoring 372,382 CoreMark/s against this instance's 266,024 — roughly 40% more throughput for the same vCPU count. On Rackspace Spot the same shape is gp.vs2.2xlarge — 16 vCPU, 64 GiB, matched on both dimensions, 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$0.768$0.165$0.508$0.348$0.041
$0.727 savings
US Central, Chicagono AWS region$0.041
US Central, Dallasno AWS region$0.051
Hong Kong$1.056$0.699$0.479$0.011
$1.045 savings
Sydney, Australia$0.960$0.429$0.635$0.435$0.161
$0.799 savings
London, UK$0.888$0.317$0.587$0.404$0.221
$0.667 savings
US West, San Jose$0.896$0.273$0.591$0.408$0.151
$0.745 savings
US Central, Dallas 2no AWS region$0.001
US East, N. Virginia 2$0.768$0.165$0.508$0.348$0.151
$0.617 savings
When to use it
Good for
  • ●Queue workers and scheduled jobs
  • ●Web and application servers with mixed CPU and memory demand
  • ●Microservices and container fleets
  • ●Workloads that fit inside 64 GiB of RAM
  • ●Parallel work that can occupy 16 vCPU
  • ●Network-heavy services — AWS rates this size at Up to 12.5 Gigabit
Avoid if
  • ●Starting a new deployment. m7i.4xlarge is the newer generation at this size.
  • ●The working set needs more than 64 GiB of RAM
  • ●More than 4.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
  • ●The work is single-threaded. Most of these 16 vCPU would sit idle.
  • ●Local NVMe or instance-store disk is a hard requirement
  • ●GPU or FPGA acceleration is needed
$561/mo on AWS on-demand against $30/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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