tech calculator
Kubernetes HPA Replica Count Simulator
Simulate Kubernetes Horizontal Pod Autoscaler scaling metrics, expected replica counts, and pod resource utilization.
Inputs
Scale Constraints
HPA Metric Tuning
Ingress Workload
Results
Recommended Replicas
7
Over-provisioning Factor
0.93x
Formula
Kubernetes HPA scaling formula
Target Replicas = ceil( Current Replicas × ( Current Metric / Target Metric ) )Computes target pods by comparing resource metrics. Scale is constrained by configured limits.
Step by step
How the calculation works
- 1Specify your deployment’s current active replicas and minimum/maximum constraints.
- 2Define HPA target resource usage (CPU or memory) and the current active utilization.
- 3Enter peak incoming HTTP Ingress Request Rate (RPS) and the maximum request capacity a single pod can sustain.
- 4Analyze the resulting pod count, over-provisioning margin, and check if scaling limits cause request drop/rejections.
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