vLLM v0.23.0 · Version scoped

In vLLM v0.23.0, `vllm:request_prompt_tokens` is registered with the label names `model_name`, engine.

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

Metric

request_prompt_tokens

Applies when

PrometheusStatLogger metrics publisherV1 metrics

Evidence

vLLM v0.23.0 v1 metrics loggers.py(vllm/v1/metrics/loggers.py:688-693)

definesprimarysource_codecode_introspection

Open cited lines in immutable upstream source ↗

688:         histogram_num_prompt_tokens_request = self._histogram_cls(
689:             name="vllm:request_prompt_tokens",
690:             documentation="Number of prefill tokens processed.",
691:             buckets=build_1_2_5_buckets(max_model_len),
692:             labelnames=labelnames,
693:         )

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

the set of values any of these labels takes at runtime
label cardinality in a deployment

Guards

vllm_version = v0.23.0
metric_name = vllm:request_prompt_tokens

Freshness

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