[thiago_fm]

They are very useful. Of your example "High CPU" could mean you need either a bigger CPU, more cores in the same host etc.

This will let you tune your application being run.

Also, this might change in a time of burst traffic, and if you don't have such tools like Prometheus, DD etc, you aren't able to tune accordingly.

The thing is that tuning a production setup is a bit of an art, there are many tradeoffs for what you do (typically, cost vs. benefit), so you need to make those decisions yourself.

If the alert is constantly ringing and you are satisfied with how the system is running and tradeoffs, you should disable it.