# @mipsytipsy on Twitter: what to alert on

- **期号**: SRE Weekly Issue #160（2019-02-17）
- **作者**: Charity Majors (and Liz Fong-Jones in reply)
- **链接**: https://twitter.com/mipsytipsy/status/1096278212257054720

## 简介

> How does one resolve the emerging consensus for alerting exclusively on user-visible outages, with the undeniable need to learn about and react to things +before* users notice? Like a high cache eviction rate?

There’s a real gem in here, definitely worth a read.

## 正文

![@mipsytipsy](https://pbs.twimg.com/profile_images/1576759705933819904/iDotz1Gw_normal.jpg)

This reminds me of something 

[@chimeracoder](https://x.com/chimeracoder)was just asking about. How does one resolve the emerging consensus for alerting exclusively on user-visible outages, with the undeniable need to learn about and react to things +before* users notice? Like a high cache eviction rate?
[5:21 AM · Feb 15, 2019](https://twitter.com/mipsytipsy/status/1096278212257054720)

[San Francisco, CA](https://twitter.com/places/5a110d312052166f)