Event loop lag climbing
Your Node.js notification service started timing out across all endpoints at 08:15. Dashboards: event-loop lag on the pods is 4s+; CPU is only 40%; a downstream template-render call to a Python sidecar over HTTP has p99 of 6s since 08:10; the in-process async queue depth is climbing without bound; memory is rising steadily. No deploy on your service, but the template sidecar got a new model at 08:08. How do you triage and mitigate?
What a strong answer looks like
Stop the bleeding first (mitigate), then form hypotheses from real signals. Separate root cause from symptom, communicate status as you go, and close with what prevents a repeat.
0:00 of about 35 min
Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.
Run or narrate your approach, then ask the coach.