← 📈 Observability & Reliability
Core
Prometheus native histograms: query distributions and migrate without blind spots
Compare classic and native Prometheus histogram representations, write service-level queries and plan a migration that preserves alert coverage and threshold meaning.
a free account opens the core tier · no card
RELATED CONCEPTS
PRACTICE THIS IN REAL QUESTIONS
Observability, SLOs & ReliabilityPrometheus memory jumped 400% overnight. Find the cause and stop it recurring.→Observability, SLOs & ReliabilityCounter, gauge, histogram, summary: which do you use for request latency, and why not the others?→Observability, SLOs & ReliabilityForty services each ship a different vendor agent. You are consolidating on OpenTelemetry. What improves, what breaks, what of the vendors?→Observability, SLOs & ReliabilityWrite the PromQL behind our availability SLO and tell me where these queries usually go wrong.→Observability, SLOs & ReliabilityHow does Prometheus collect metrics? Explain the pull model, exporters and when you need a pushgateway.→Observability, SLOs & ReliabilityLogs, metrics and traces: what is each one good at, and which do you reach for first in an incident?→