Your question is Troubleshooting Distributed Bottlenecks. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Describe a time you had to troubleshoot a bottleneck in a distributed system.
Walk through the symptoms, your investigation strategy, the evidence that identified the bottleneck, and the remediation. Explain how you balanced mitigation with root-cause analysis, validated the fix, and prevented recurrence. Be specific about observability, dependencies, capacity, latency, and any tradeoffs.