The only two log levels you need are INFO and ERROR

from blog ntietz.com blog, | ↗ original
Logging is a critical tool for maintaining any web application, and yet we're getting it wrong. With great logs, you can see what your application is doing. And without them? Things can be broken left and right without you ever finding out. Instead, you wonder why your customers don't come back, and shrug, and blame someone other than...