Storm JVM 参数优化

在配置文件storm.yaml中，有：

# to nimbus 
nimbus.childopts: "-Xmx1024m" 

# to supervisor 
supervisor.childopts: "-Xmx1024m" 

# to worker 
worker.childopts: "-Xmx768m" 

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：
worker.childopts: "-Dworker=worker -Xmx768m -Xdebug –Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=8111,suspend=y,server=y "