The m8g.16xlarge pairs 64 vCPU with 256 GiB of RAM, the 4.00 GiB-per-vCPU ratio that marks a general-purpose instance. In the name, "m" is the general-purpose line, "8" is the generation, "g" marks AWS Graviton (ARM) processors and "16xlarge" is the size within the m8g family. It runs on AWS Graviton4 Processor at 2.7 GHz, and AWS introduced it in September 2024. AWS has since shipped m9g; m9g.16xlarge is the direct replacement at this size, scoring 2,328,543 CoreMark/s against this instance's 1,941,748 — roughly 20% more throughput for the same vCPU count. Spot's node ladder tops out below this size, so m8g.16xlarge becomes 4 × gp.vs2.2xlarge (64 vCPU, 256 GiB combined), about 94% below the US East (N. Virginia) on-demand rate. Spot delivers compute as managed Kubernetes, so a node pool of that size is the native shape of the answer rather than a workaround — provided the workload scales horizontally.
| Region | AWS on-demand | AWS Spot | 1-yr Reserved | 3-yr Reserved | Rackspace Spot | You save |
|---|---|---|---|---|---|---|
| US East, N. Virginia | $2.872 | $0.785 | $1.900 | $1.303 | $0.164 | $2.708 savings |
| US Central, Chicago | no AWS region | $0.164 | ||||
| US Central, Dallas | no AWS region | $0.204 | ||||
| Hong Kong | $3.949 | $2.613 | $1.792 | $0.044 | $3.905 savings | |
| Sydney, Australia | $3.590 | $1.072 | $2.375 | $1.628 | $0.644 | $2.946 savings |
| London, UK | $3.322 | $0.560 | $2.194 | $1.510 | $0.884 | $2.438 savings |
| US West, San Jose | $3.351 | $0.750 | $2.210 | $1.527 | $0.604 | $2.747 savings |
| US Central, Dallas 2 | no AWS region | $0.004 | ||||
| US East, N. Virginia 2 | $2.872 | $0.785 | $1.900 | $1.303 | $0.604 | $2.268 savings |