Specify a set of logger names and the corresponding log levels that this log recorder will collect. For example, if you specify jenkins.model and INFO then any events triggered for jenkins.model or its descendents (e.g. jenkins.model.Jenkins) with the log level INFO or above will show up in this log recorder.

If you have multiple entries, a log message will only be recorded if the most specific matching logger's level would collect it.

Also see this document for more about logging in Java and Jenkins.