PBPaul Baeinbitstoagent.hashnode.dev·May 31 · 14 min readModern Observability Architecture — Designing Cross-Signal Correlation from First Principles (3)Part III — End-to-End Debugging Walkthrough 12. P99 Latency Spike Runbook: Metric → (Exemplar) → Trace → Log 12.1 Step 0: Symptom Confirmation Which SLI (P99) degraded, and in which dimension (servic00
PBPaul Baeinbitstoagent.hashnode.dev·May 31 · 3 min readModern Observability Architecture — Designing Cross-Signal Correlation from First Principles (2)Why Trace ↔ Metric Full Direct Correlation Breaks 4.1 The Nature of Metrics: Aggregated Time Series + Label Index The OTel metric model assumes "pre-aggregated timeseries." Metrics are not per-reques00
PBPaul Baeinbitstoagent.hashnode.dev·May 31 · 14 min readModern Observability Architecture — Designing Cross-Signal Correlation from First Principles (1)(APM SDK vs OpenTelemetry SDK) 0. Introduction: Why This Document Exists 0.1 Observability Correlation Determines Debugging Cost The cost of modern incident response is determined not by "whether dat00
PBPaul Baeinbitstoagent.hashnode.dev·May 31 · 5 min readWhy do modern programming languages exist?Why do modern programming languages exist? When you write programs in C, you rarely talk to the operating system or hardware directly. Most of the time you go through the standard library. For example00
PBPaul Baeinbitstoagent.hashnode.dev·Apr 20 · 30 min readWhere State Lives in Backend Systems0. Introduction — Name the State Before the Product Most backend architecture discussions become product discussions too early. The team asks whether it should use Redis, Kafka, RabbitMQ, SQS, EventBr00
