# Monitoring & Observability: Using Logs, Metrics, Traces, and Alerts to Understand System Failures - **期号**: SRE Weekly Issue #502(2025-12-21) - **作者**: Mahmoud Abdelwahab — Railway - **链接**: https://blog.railway.com/p/using-logs-metrics-traces-and-alerts-to-understand-system-failures ## 简介 I appreciate the way this article also shares how each of logs, metrics, traces, and alerts has its downsides, and what you can do instead. FYI, there’s also a fairly extensive product-specific second half about observabilty on Railway. ## 正文 > ⚠️ 抓取失败:HTTP 404