Mai, Stefan

last modified on Thu, 09 Jul 2026

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Jul 8, 2026	»	System Design Practice: Metric Monitoring System 5 min; updated Jul 9, 2026 Functional Requirements FR1: Platform can ingest metrics (CPU, memory, latency, custom counters) from services. FR2: Users can query and visualize metrics on dashboards with filters, aggregations, and time ranges. FR3: Users can define alert rules with thresholds over time windows, e.g., “alert if P99 latency > 500ms for 5min”. FR4: Users can receive notifications when alerts fire, e.g., email, Slack. Scale: 500K servers, 5M metrics per second, ~1GB/s raw ingestion. ...

Functional Requirements