Dev Load Testing Plan Writer
============================

Create a load testing plan for [application/endpoint].

Application details:
- Target: [specific endpoints or full application]
- Current capacity: [known or unknown]
- Expected peak load: [requests per second/users]
- SLA requirements: [response time/error rate]
- Tool: [k6/JMeter/Locust/Artillery]
- Environment: [staging/production-like]

LOAD TESTING PLAN

1. OBJECTIVES
   - Establish baseline performance
   - Find breaking point (stress test)
   - Verify SLA can be met at peak load
   - Identify bottlenecks before production

2. TEST SCENARIOS

   SCENARIO 1 — BASELINE
   - Users: [expected normal load]
   - Duration: [10 minutes]
   - Ramp up: [1 minute]
   - Goal: [establish normal metrics]

   SCENARIO 2 — PEAK LOAD
   - Users: [expected peak]
   - Duration: [15 minutes]
   - Ramp up: [3 minutes]
   - Goal: [verify SLA at peak]

   SCENARIO 3 — STRESS TEST
   - Users: [2-3x expected peak]
   - Duration: [until failure or 20 minutes]
   - Goal: [find breaking point]

   SCENARIO 4 — SOAK TEST
   - Users: [normal load]
   - Duration: [1-2 hours]
   - Goal: [find memory leaks/degradation]

3. TARGET ENDPOINTS
   | Endpoint | Expected Load | SLA Target |
   | GET /api/products | [X req/s] | [<200ms p99] |
   | POST /api/orders | [X req/s] | [<500ms p99] |
   | GET /api/search | [X req/s] | [<300ms p99] |

4. SUCCESS CRITERIA
   - Response time: p99 < [Xms] at peak load
   - Error rate: < [X%] at peak load
   - Throughput: [X] requests/second sustained
   - No memory leaks: [memory stable over time]
   - CPU: < [X%] at peak load

5. TEST SCRIPT STRUCTURE (k6 example)
   ```javascript
   import http from 'k6/http'
   import { check, sleep } from 'k6'

   export const options = {
     stages: [
       { duration: '1m', target: 50 },  // ramp up
       { duration: '10m', target: 50 }, // stay
       { duration: '1m', target: 0 },   // ramp down
     ],
     thresholds: {
       http_req_duration: ['p99<500'],
       http_req_failed: ['rate<0.01'],
     },
   }

   export default function() {
     const res = http.get('https://staging.example.com/api/products')
     check(res, {
       'status is 200': (r) => r.status === 200,
       'response time OK': (r) => r.timings.duration < 500,
     })
     sleep(1)
   }
   ```

6. MONITORING DURING TEST
   - Response time: [dashboard link]
   - Error rate: [dashboard link]
   - Server CPU/Memory: [dashboard link]
   - Database connections: [monitor]
   - Cache hit rate: [monitor]

7. RESULTS DOCUMENTATION
   | Scenario | Peak RPS | p50 | p95 | p99 | Error Rate |
   | Baseline | [] | []ms | []ms | []ms | [%] |
   | Peak Load | [] | [] | [] | [] | [] |
   | Stress | [] | [] | [] | [] | [] |

Source: https://promptzyo.com/prompt/dev-load-testing-plan-writer