vllm:num_preemptions

Counter for cumulative preemptions from the engine.

MetricPrometheusvLLM v0.23.0verified 7 hr ago

Claim	Verified
In vLLM v0.23.0, `vllm:num_preemptions` is a Prometheus counter for cumulative preemptions from the engine.	7 hr ago
In vLLM v0.23.0, `vllm:num_preemptions` increments from `IterationStats.num_preempted_reqs`, which is increased when engine-core events mark requests as preempted.	7 hr ago

vllm:num_preemptions is registered as a Prometheus counter in vLLM v0.23.0.

vllm.surface.prometheus_metricscomplete_inventoryPrometheusStatLogger metrics publisher

vLLM v0.23.0 v1 metrics loggers.py · vllm/v1/metrics/loggers.py:619-626