# Simple/hard metrics that help reduce MTTR when looking for a root cause

- **期号**: SRE Weekly Issue #136（2018-08-26）
- **作者**: Pavel Trukhanov — okmeter
- **链接**: https://blog.okmeter.io/simple-hard-metrics-that-help-reduce-mttr-when-looking-for-a-root-cause-637eaf5b3518

## 简介

A story of a somewhat rare failure case (a datacenter heat buildup event) and how to monitor for such a thing without contributing to metrics overload.

## 正文

> ⚠️ 抓取失败：URLError: _ssl.c:1015: The handshake operation timed out