{
  "name": "Sabit istek hızı ve ani yük",
  "variables": { "base": "https://api.example.com" },
  "options": { "timeout": "5s" },
  "scenarios": [
    {
      "name": "normal",
      "executor": { "type": "constant-arrival-rate", "rate": 200, "timeUnit": "1s", "duration": "10m",
        "preAllocatedVUs": 50, "maxVUs": 400 },
      "steps": [
        { "id": "search", "name": "Arama",
          "request": { "url": "{{base}}/v1/search", "query": [ { "key": "q", "value": "urun{{$randInt 1 5000}}" } ] },
          "checks": [ { "type": "status", "value": 200 } ] }
      ]
    },
    {
      "name": "ani_yuk",
      "startTime": "4m",
      "executor": { "type": "ramping-arrival-rate", "startRate": 0, "timeUnit": "1s", "preAllocatedVUs": 50, "maxVUs": 600,
        "stages": [ { "duration": "30s", "target": 800 }, { "duration": "1m", "target": 800 }, { "duration": "30s", "target": 0 } ] },
      "steps": [
        { "id": "search_spike", "name": "Arama (ani yük)",
          "request": { "url": "{{base}}/v1/search", "query": [ { "key": "q", "value": "kampanya" } ] },
          "checks": [ { "type": "status", "value": 200 } ] }
      ]
    }
  ],
  "thresholds": [
    { "metric": "req_duration", "filter": { "scenario": "normal" }, "expr": "p(99)<500" },
    { "metric": "req_failed", "expr": "rate<0.02", "abortOnFail": true },
    { "metric": "dropped_iterations", "expr": "count<100" }
  ]
}