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Serverless Cold Start Latency & Concurrency Planner
Simulate cold start probability, SLA latency penalties, and compute provisioned concurrency idle costs.
Inputs
Runtime & Capacity
Function Workload
Custom Latency Penalty
Results
Composite Average Latency
556.4 ms
Idle Provisioned Cost
$0.00
Formula
Cold Start Probability formula
P(Cold Start) = 1 - Poisson_CDF( Active_Containers, Provisioned_Concurrency )Uses Poisson queues to model the probability of incoming requests finding all provisioned warm instances occupied.
Step by step
How the calculation works
- 1Select the runtime language (Node, Go, Python, Java) to load typical cold start latency penalties.
- 2Define the incoming request rate (Ingress RPS) and average execution time (ms).
- 3Configure the Provisioned Concurrency value (warm reserved instances).
- 4Evaluate the balance between average composite latency, cold starts, and idle resource cost overhead.
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