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Logs, metrics, traces, correlation IDs, dependency telemetry, health checks, sampling, and telemetry design for backend systems.
Practice items tagged with Observability Foundations.
Separates application composition in AppHost from reusable in-process defaults for telemetry, health, resilience, and service discovery.
Explains dependency duration, error rate, timeout rate, query tagging, Redis latency, HTTP downstream calls, and endpoint correlation.
Chooses counters, traces, stack snapshots, GC dumps, full dumps, or a profiler from the production symptom and investigation cost.
Designs controlled diagnostic access, collection triggers, container permissions, artifact egress, privacy, retention, and post-capture verification.
Compares vendor-neutral OpenTelemetry concepts with Application Insights usage for .NET production services.
Explains sampling, high-cardinality labels, retention, cost, and keeping enough signal for incident diagnosis.