The m8g.12xlarge pairs 48 vCPU with 192 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 "12xlarge" 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.12xlarge is the direct replacement at this size, scoring 1,757,705 CoreMark/s against this instance's 1,434,549 — roughly 23% more throughput for the same vCPU count. Spot's node ladder tops out below this size, so m8g.12xlarge becomes 3 × gp.vs2.2xlarge (48 vCPU, 192 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 | $2.154 | $0.524 | $1.425 | $0.977 | $0.123 | $2.031 savings |
| US Central, Chicago | no AWS region | $0.123 | ||||
| US Central, Dallas | no AWS region | $0.153 | ||||
| Hong Kong | $2.962 | $1.959 | $1.344 | $0.033 | $2.929 savings | |
| Sydney, Australia | $2.693 | $0.789 | $1.781 | $1.221 | $0.483 | $2.210 savings |
| London, UK | $2.491 | $0.265 | $1.645 | $1.133 | $0.663 | $1.828 savings |
| US West, San Jose | $2.513 | $0.658 | $1.657 | $1.145 | $0.453 | $2.060 savings |
| US Central, Dallas 2 | no AWS region | $0.003 | ||||
| US East, N. Virginia 2 | $2.154 | $0.524 | $1.425 | $0.977 | $0.453 | $1.701 savings |