Diabling logging in log4j

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 ?

You want to set the logging level something like:

If you set it to FATAL, then only vey serious errors will be logged, thats probably a good practice.

You can find full details and examples here.

I think I didnt make my question clear.
I dont want to know about levels. Infact my log4j.properties file has two appenders, one set to the level of fatal and another to debug. What I want to know is how to diable logging as a whole? I guess this can be done using log4j.diable=fatal.But it is not happening with this statement alone. It has to be preceded or followed by log4j.diableOverride. But I dont know what is the exact way of doing it. Can anybody clarify ?

My google search on log.disable returned results that make it look like that might have been used in some previous version of log4j.

Have you tried this one?

log4j.threshold=OFF

Thanks Carol .... it worked !!