Tagged articles

production incident response

2 articles · Page 1 of 1

Sep 13, 2026 · Backend Development

Java CPU 100% Spike: Complete Production Troubleshooting & Root Cause Analysis

This article provides a comprehensive guide to troubleshooting Java CPU 100% spikes in production, covering root cause categories, a standard SOP using top, jstack, and thread analysis, a real-world infinite loop case study, GC-related CPU issues, emergency mitigation steps, and long-term prevention practices.

Garbage CollectionJavaPerformance Tuning

0 likes · 13 min read

Java CPU 100% Spike: Complete Production Troubleshooting & Root Cause Analysis

Raymond Ops

Sep 4, 2026 · Operations

CPU 100% at 3 AM: Complete Troubleshooting Guide with Real Incident Analysis

This article provides a step-by-step guide to troubleshooting CPU 100% incidents in production, covering Linux CPU metrics, Java GC and thread analysis with jstat/jstack/Arthas, system-level tools like perf and flame graphs, and a detailed case study where MySQL backup-induced replica lag triggered cascading Full GCs and CPU saturation.

GC AnalysisJVM TuningJava performance

0 likes · 49 min read

CPU 100% at 3 AM: Complete Troubleshooting Guide with Real Incident Analysis