Practical Observability: Logging, Tracing, and Metrics for Better Debugging - RUBY 656

2682.008 - 2705.062 John Gallagher

And everything can be derived as a metric from the two rungs above. So if you've got only logs, you don't have any nested context. But you can get metrics from logs. Fine. If you just have metrics, I would say you're not in great shape because you can't understand why without pure guessing. And it amazes me how many people push back on this idea and think just having some metrics is enough.