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fix: avg_time_queue_us under-reports queue time in k8s-onprem autoscaling rule #8995

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fix: avg_time_queue_us under-reports queue time in k8s-onprem autoscaling rule #8995

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7 changes: 6 additions & 1 deletion deploy/k8s-onprem/values.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -81,4 +81,9 @@ prometheus-adapter:
name:
matches: "nv_inference_queue_duration_us"
as: "avg_time_queue_us"
metricsQuery: 'avg(delta(nv_inference_queue_duration_us{<<.LabelMatchers>>}[30s])/(1+delta(nv_inference_request_success{<<.LabelMatchers>>}[30s]))) by (<<.GroupBy>>)'
# Mean time a request spent queued on the pod across all models it serves.
# Both counters are per-model series, so they must be summed over the pod
# before dividing; averaging per-model ratios lets idle models dilute the
# value. clamp_min guards the division by zero without shifting the result,
# and increase (not delta) handles counter resets on server restart.
metricsQuery: 'sum(increase(nv_inference_queue_duration_us{<<.LabelMatchers>>}[30s])) by (<<.GroupBy>>) / clamp_min(sum(increase(nv_inference_request_success{<<.LabelMatchers>>}[30s])) by (<<.GroupBy>>), 1)'