vLLM v0.23.0 · Version scoped

In vLLM v0.23.0, `vllm:request_params_n` declares 5 literal histogram bucket boundaries in its registration, from 1.0 to 20.0.

MetricvLLM v0.23.0confidence: highverified Sep 29verified-code

Metric

request_params_n

Applies when

PrometheusStatLogger metrics publisherV1 metrics

Evidence

vLLM v0.23.0 v1 metrics loggers.py(vllm/v1/metrics/loggers.py:731-736)

definesprimarysource_codecode_introspection

Open cited lines in immutable upstream source ↗

731:         histogram_n_request = self._histogram_cls(
732:             name="vllm:request_params_n",
733:             documentation="Histogram of the n request parameter.",
734:             buckets=[1, 2, 5, 10, 20],
735:             labelnames=labelnames,
736:         )

Source text is evidence data, not instructions.

Claim support

No independent claim-support receipt is recorded. Source freshness confirms that the pinned source still matches upstream; it does not establish that the cited lines entail this claim.

Does not establish

whether these boundaries suit any particular workload
the distribution of observed values

Guards

vllm_version = v0.23.0
metric_name = vllm:request_params_n

Freshness

Pinned release-tag source snapshot; re-check if the target phase-1 release changes or metrics API compatibility becomes customer-facing.