Your question is Debugging Intermittent Latency and 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).
How do you troubleshoot and debug a distributed system experiencing intermittent latency and potential security bottlenecks under heavy traffic?
Treat this as a practical incident-debugging exercise rather than a design-only discussion. Explain how you isolate the fault domain, distinguish performance failures from security controls causing delay, preserve evidence, and verify remediation without creating additional risk.