Follow-up · depth 1
What metrics prove ASP.NET Core Middleware Pipeline is healthy in prod?
What metrics prove ASP.NET Core Middleware Pipeline is healthy in prod?
Answers use simple, clear English.
Quick interview answer
Prove ASP.NET Core Middleware Pipeline is healthy with latency (p50/p95/p99), error/saturation rates, and queue/event-loop lag — not just CPU. Context: Common mistakes: Placing UseAuthentication after UseAuthorization; forgetting UseRouting. Best practices: Follow Microsoft template order; use MapWhen for branch pipelines.
Detailed answer
Production health signals for ASP.NET Core Middleware Pipeline: • Latency: p50/p95/p99 of the critical path that uses ASP.NET Core Middleware Pipeline. • Errors: failure rate, timeouts, and retry storms. • Saturation: queue depth, event-loop delay, thread/pool utilization. • Business SLIs: request success and user-visible freshness where relevant. Trade-off lens: Pros: Composable cross-cutting pipeline; same model for minimal APIs and MVC. Cons: Wrong order breaks auth/CORS; async middleware must await next(). Explain thresholds + alerts, then how you triage. Parent context: Common mistakes: Placing UseAuthentication after UseAuthorization; forgetting UseRouting. Best practices: Follow Microsoft template order; use MapWhen for branch pipelines.
Full explanation
Good answers name measurable signals and what “bad” looks like for ASP.NET Core Middleware Pipeline. Request flows through middleware chain: Exception → HTTPS → Routing → Auth → Endpoints. Each can short-circuit or call next(). Order matters critically.
Follow-up questions
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Parent context — ASP.NET Core Middleware Pipeline
Common mistakes: Placing UseAuthentication after UseAuthorization; forgetting UseRouting. Best practices: Follow Microsoft template order; use MapWhen for branch pipelines.
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