Suppose the MCPC server normally spawns in 300 milliseconds, but suddenly a request takes more than 10 seconds. The database and other backends appear healthy. How would you investigate this?

First, confirm the symptom by reproducing the slow request in a staging environment. Enable detailed logging on the MCPC server to capture timestamps for each stage: request receipt, authentication, business logic, external calls, and response. Use distributed tracing (e.g., OpenTelemetry) to see where the latency is added. Check metrics for CPU, memory, GC pauses, and thread contention on the server. Inspect network latency to any external services or databases; even if the database reports healthy, a slow query or lock could be hidden. Verify that no new code or configuration changes were deployed recently. Look at the request payload size and any serialization/deserialization overhead. If the server uses a thread pool, ensure it isn’t saturated. Finally, run a profiler or use a tool like JProfiler or VisualVM to identify hotspots. Once the culprit is identified, apply the appropriate fix (e.g., optimize code, increase resources, adjust timeouts).