在线上故障诊断的结构化方法，涵盖日志分类、指标峰值关联、发布窗口过滤和安全复现步骤。
使用场景
- Service returning 5xx errors
- Memory leak suspected
- Latency spike in production
主要功能
- Check error rate and latency dashboards for the affected service — identify the spike window
- Filter logs by service, severity, and time window — look for exceptions or unusual patterns
- Correlate the incident with recent deployments: which version is running, was there a deploy in the last hour?
- Check dependent service health — upstream failures often cascade downstream
- Identify a safe minimal reproduction: a curl or small script that reproduces the failure without side effects
- Open a targeted fix branch — never debug directly in production
- After fix, verify metrics return to baseline before marking incident resolved
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