System Monitoring & Performance Diagnosis

1. 1. The "It's Slow" Starting Point: A Resource-First Diagnostic Mindset
2. 2. CPU: Reading Load, Utilization & Run Queues
3. 3. Memory: Used, Free, Cached & the "Available" Metric
4. 4. Disk I/O: IOPS, Throughput & Latency
5. 5. Disk Space: Filling Up, and Where It Actually Went
6. 6. Network as a Performance Symptom
7. 7. Reading Monitoring Dashboards: Grafana & Cloud Console Metrics at a Glance
8. 8. Process-Level Diagnosis: Finding the Specific Culprit
9. 9. Sustained vs. Transient Load: When a Spike Isn't a Problem
10. 10. Capstone — Triaging Three Real Performance Tickets