By default, WebSphere Application Server has a global log level of `info` (*=info). This means the following messages are logged: info, audit, warning, severe, and fatal. It is almost always a malpractice to use *=severe, *=fatal, or *=off, because warnings and errors generally occur infrequently and are critical to understanding why problems occurred. It is often a malpractice to use *=warning, because there are many informational messages that are very useful to understanding why problems occurred. If there are repeating messages flooding your logs, then the last resort should be to broadly disable core logging; instead, consider:
- Open a support ticket with the owner of the message to understand why the message occurs so frequently.
- Change the log level of the particular logger for those messages (after understanding what they mean in #1). Any log levels specified after the global log level override the log level for that particular logger. For example, if the log configuration is `*=info:com.test.Logger=warning`, then the threshold is only changed for com.test.Logger messages.