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# @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)