Asynchronous logger in log4j

Hi,

I want to make the loggers asynchronous in Log4j.

//To make all loggers asynchronous, add disruptor-3.0.0.jar to the classpath and set the system property Log4jContextSelector to org.apache.logging.log4j.core.async.AsyncLoggerContextSelector.

Can anyone explain how to set the system property.

Thanks,
Raj