RTE logo
← Back to Node.js performance map
Node.js Performance

Capacity Curve

Find the point where more RPS causes latency to explode.

capacity

Detailed Description

A capacity curve shows the relationship between concurrency, throughput, and latency. At first, RPS rises as concurrency increases; after saturation, latency climbs sharply and errors may appear.

The safe operating point is before the knee of the curve. Use that point to set autoscaling thresholds, queue limits, worker concurrency, and per-instance traffic budgets.

Mental Model

increase concurrency
-> plot RPS + p99
-> find knee of curve

When To Use

  • ->Decide instance count before launch
  • ->Choose autoscaling thresholds
  • ->Find max safe concurrency per pod
Tools: autocannon matrix, Grafana dashboard, SLO capacity planning
capacity-loop.sh

Live Editor

Loading...

Output

Run code to see output...

Comments

Sign in to leave a comment. Your name and photo come from Google; nothing else is shared.

Loading comments...