Technologies/Envoy/envoy.http.downstream.connection.active
EnvoyEnvoyMetric

envoy.http.downstream.connection.active

Active downstream HTTP connections
Dimensions:None
Available on:PrometheusPrometheus (1)OpenTelemetryOpenTelemetry (1)Native (1)
Interface Metrics (3)
PrometheusPrometheus
Current number of active downstream HTTP connections
Dimensions:None
OpenTelemetryOpenTelemetry
Current number of active HTTP connections from downstream clients
Dimensions:None
Native
Current number of active HTTP connections from downstream clients
Dimensions:None
Sources
envoy_http_downstream_cx_activewww.envoyproxy.io
envoy.http.downstream.connection.activegithub.com
http.downstream_cx_activewww.envoyproxy.io

Technical Annotations (7)

Configuration Parameters (1)
envoy.reloadable_features.http2_use_oghttp2recommended: false
Workaround to disable buggy oghttp2 codec
CLI Commands (2)
kubectl exec deploy/my-service -c istio-proxy -- pilot-agent request GET stats | grep "downstream_cx_active\|upstream_cx_active"diagnostic
kubectl exec deploy/my-service -c istio-proxy -- pilot-agent request GET stats | grep "downstream_cx_total\|upstream_cx_total"diagnostic
Technical References (4)
flow control windowconceptDATA framesprotocologhttp2componentQUICHEcomponent
Related Insights (3)
High active connection count indicates connection leakswarning
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Active connection spikes indicate load balancer misconfigurationwarning
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HTTP/2 flow control window leak with DATA frame padding causes connection deadlockcritical
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