1. # to nimbus 
    2. nimbus.childopts: "-Xmx1024m" 
    4. # to supervisor 
    5. supervisor.childopts: "-Xmx1024m" 
    7. # to worker 
    8. worker.childopts: "-Xmx768m" 
    10. 如果worker在运行时，需要用指定的JVM参数，那么可以像这样配置：
    11. worker.childopts: "-Dworker=worker -Xmx768m -Xdebug –Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=8111,suspend=y,server=y "