### **reactor_num** ***** <br> Reactor线程数 ``` $serv->set(array( 'reactor_num ' => 2 )); ``` 通过此参数来调节主进程内事件处理线程的数量，以充分利用多核。默认会启用CPU核数相同的数量。 * reactor_num建议设置为CPU核数的1-4倍 * reactor_num最大不得超过SWOOLE_CPU_NUM * 4 <br> **注：** > reactor_num必须小于或等于worker_num 如果设置的reactor_num大于worker_num，会自动调整使reactor_num等于worker_num 1.7.14以上版本在超过8核的机器上reactor_num默认设置为8