{
  "slug": "coordinated-omission",
  "term": "Coordinated omission",
  "aliases": [],
  "definition": "Coordinated omission is a measurement bias in which a workload generator or sampler misses observations because its activity depends on the slow responses being measured.",
  "note": "A correct histogram of issued requests need not describe independent arrivals; synthetic correction must state its expected-interval assumption.",
  "related": [
    "open-loop-load",
    "closed-loop-load",
    "latency-storage"
  ],
  "citations": [
    {
      "id": "wrk2",
      "title": "Gil Tene, wrk2: scheduled-arrival latency and coordinated omission; maintainer documentation, not an SSD benchmark.",
      "url": "https://github.com/giltene/wrk2",
      "accessed": "2026-10-11"
    },
    {
      "id": "hdr",
      "title": "HdrHistogram maintainers: corrected versus raw value recording and expected sampling intervals.",
      "url": "https://github.com/HdrHistogram/HdrHistogram#corrected-vs-raw-value-recording-calls",
      "accessed": "2026-10-11"
    },
    {
      "id": "hesela-latency",
      "title": "Hesela: synthetic arrival cohorts, timing boundaries and percentile pooling",
      "url": "https://hesela.com/analyses/storage-latency-coordinated-omission/",
      "accessed": "2026-10-11"
    },
    {
      "id": "hesela-model",
      "title": "Hesela synthetic timing records: model parameters, full request cohorts and SHA-256 provenance",
      "url": "https://hesela.dev/research/latency-measurement.json",
      "accessed": "2026-10-11"
    }
  ],
  "status": "unknown",
  "advantages": [],
  "limitations": [],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-10-11"
}