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I rather wish every logging framework had at the top of its web site landing page a prominent link to the effect "Are you working on a project that already has SomethingLog4J logging? Maybe you want a _recipe for adjusting logging levels of a particular class_!"
Almost always I do not want the 10-page tutorial that starts with explaining the concepts of loggers, appenders, etc.,— I just want to be told where to find and how to tweak the config of an existing system.