Technical guide
How to Monitor Kafka Consumer Lag: CLI, Exporters, Alerts (2026)
Kafka consumer lag explained and monitored — kafka-consumer-groups.sh, Lag Exporter vs Burrow, lag-rate alert rules, and time-lag metrics that actually page correctly.
Technical guide
How to Monitor MySQL Slow Queries: Setup, Analysis, Alerts (2026)
Find and fix MySQL slow queries — enable the slow query log, analyze with pt-query-digest, catch them live with performance_schema, and alert before users notice.
Technical guide
Kubernetes CrashLoopBackOff: Meaning, Diagnosis, and the 8 Fixes (2026)
CrashLoopBackOff explained — what it actually means, the kubectl diagnosis sequence, and the 8 root causes with fixes: config, probes, OOM, init containers, and more.
Technical guide
Kubernetes OOMKilled: Exit Code 137 Explained, and How to Fix It (2026)
OOMKilled in Kubernetes — what exit code 137 means, limits vs node memory vs JVM heap, how to diagnose with kubectl, and the fixes that actually hold.
Explainer
Observability vs Monitoring: The Real Difference, With Examples (2026)
Observability vs monitoring explained — known unknowns vs unknown unknowns, side-by-side comparison table, real incident examples, and why you need both.
Technical guide
OpenTelemetry Not Showing Traces? The 7-Step Debug Checklist (2026)
OpenTelemetry traces missing? Debug in 7 steps — debug exporter, endpoint/TLS checks, sampling traps, context propagation, and the Collector logs that name the cause.
Explainer
What Is Observability? Definition, Three Pillars & Examples (2026)
Observability defined in plain terms — the control-theory origin, metrics/logs/traces pillars, observability vs monitoring, and concrete production examples.
Technical guide
Why Do Kubernetes Pods Restart? The 7 Causes and How to Diagnose Each (2026)
Kubernetes pods restarting? The 7 real causes — OOMKilled, CrashLoopBackOff, probe failures, eviction, node pressure — with the kubectl commands to diagnose each.