Where to find how to change log settings

[jsents]

In searching the formums I have seen several messages on checking your log settings for performance increases but have not found how to do this. Does anyone know where I can find how to check/change my log settings?
I would like to know for
JBoss 2.4.x & 3.0
Jetty 4.0
Tomcat 4.0.

[jwkaltz]

For logging log4j is used. (See jakarta.apache.org for details on the log4j project).

You have a configuration file log4j.properties
The log level is set to DEBUG in the JBoss package. You can set it higher (for example, INFO)
-> lots of messages less that will be logged
-> higher performance

[davidjencks]

In 3.0 we now use the xml format log4j.xml.