Schema.ai· vLLM
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In vLLM v0.23.0, vllm:kv_block_idle_before_evict_seconds declares 21 literal histogram bucket boundaries in its registration, from 0.001 to 1800.0.

MetricvLLM v0.23.0confidence: highverified 17 min agoverified-code

Metric

kv_block_idle_before_evict_seconds

Applies when

PrometheusStatLogger metrics publisherV1 metricsobservability_config.kv_cache_metrics=True

Evidence

vLLM v0.23.0 v1 metrics loggers.py(vllm/v1/metrics/loggers.py:974-982)
definesprimarysource_codecode_introspection

Does not establish

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

Guards

  • vllm_version = v0.23.0
  • metric_name = vllm:kv_block_idle_before_evict_seconds

Freshness

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