Discussion on: Logging! How do you decide on your app log levels and outputs?

[Dian Fay]

The answers to 1 and 2 are pretty contextual. The best I can give for 1 is "when you think you might need it", which is less than helpful. 3 though:

• trace is for following something through the code line by agonizing line
• debug is for stuff you'll want to know when you're trying to analyze application behavior
• info is for 'good to know' status messaging
• warn is for a problem you'll start caring about if it starts happening a lot
• error is for a problem you'll care about no matter what
• the occasionally-available fatal is for when something has literally caught fire
• I've never seen a "verbose" log level; it's usually a flag that enables higher-level messaging (debug and up)

Or:

John Barnette

@jbarnette

Revised log levels proposal: "fyi," "wtf," and "omg."

14:53 PM - 08 Dec 2011

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