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feat(grafana): chart the tracker's event-loop delay - #143
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The event-loop delay gauges were exported and used by the capacity guide and the EventLoopLag alert, but the dashboard did not show them. The Signaling row now has three panels: subscribers, signaling traffic, and event-loop delay (p50, p99, max, in seconds).
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# Conflicts: # CHANGELOG.md
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The
openstreamgrid_event_loop_delay_{p50,p99,max}_secondsgauges drive the capacity guide and theOpenStreamGridEventLoopLagalert (#137), but the dashboard did not chart them.The Signaling row now has three panels, each 8 columns wide:
The k8s README dashboard description is updated. The monitoring-metrics test confirms that the new queries use exported metrics.