I read this in one log4j document on net:

"When moving code to production, for speedy performance, you can disable logging wholesale equal to or below a certain priority for all categories in a hierarchy. For example, To log nothing at all ever, specify log.disable=FATAL in the configuration properties file. "

But this is not working in my case. Should I use "log.disableOverride". If yes, then how exactly to use this ?