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Evaluate, configure, and migrate workloads to AWS Lambda Managed Instances (LMI).
Passed 18 of 20 test cases with the skill, and 5 of 20 without it.
and 20 more in the full report
15 fixed5 passed either way1 still failing1 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 14 test cases the skill fixed. Same model, same prompt, with and without the skill.
We are configuring multi-concurrency limits for two backend services running on managed instance infrastructure: one written in Node.js and another in Python. What are the maximum concurrency settings per vCPU for each runtime?
| Checked | Without skill | With skill |
|---|---|---|
| Specifies 64 concurrent executions per vCPU for Node.js. | Missed | Passed |
| Specifies 16 concurrent executions per vCPU for Python. | Missed | Passed |
The instructions your model reads when the skill loads.
Run Lambda functions on current-generation EC2 instances in your account while AWS manages provisioning, patching, scaling, routing, and load balancing. Combines Lambda's developer experience with EC2's pricing and hardware options.
For standard Lambda development, see aws-lambda skill. For SAM/CDK deployment, see aws-serverless-deployment skill.
| Signal | LMI is a strong fit | Standard Lambda is better |
|---|---|---|
| Traffic | Steady, predictable, 50M+ req/mo | Bursty, unpredictable, long idle |
| Cost | Duration-heavy spend at scale | Low or sporadic invocations |
| Cold starts | Unacceptable (LMI eliminates for provisioned capacity; scale-out may have brief delays) | Tolerable or mitigated by SnapStart |
| Compute | Latest CPUs, specific families, high network bandwidth | Standard Lambda memory/CPU sufficient |
| Isolation | Dedicated EC2 instances in your account, full VPC control | Shared Firecracker micro-VMs acceptable |
| Scale-to-zero | Not needed (execution environments always running) | Required (pay nothing when idle) |
| Code readiness | Thread-safe (Node.js/Java/.NET) or any Python code | Non-thread-safe Node.js/Java/.NET, expensive to change |
Gather these signals before recommending:
/tmp paths? Per-invocation DB connections?test cases passed, vs 5 / 20 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.