BusinessWorker 进程出现busy

1692    N/A     none                               N/A        BusinessWorker N/A            N/A        N/A          N/A          N/A       N/A             N/A       busy
1716    N/A     none                               N/A        BusinessWorker N/A            N/A        N/A          N/A          N/A       N/A             N/A       busy

cat BusinessWorker.conf
;业务进程入口文件
worker_file =../Bootstrap/BusinessWorker.php
;启动多少业务进程
start_workers = 40
;运行业务进程的用户，为了安全，请使用权限较低的用户如 www-data nobody
user = nobody
;预读长度
preread_length = 27
;长连接
persistent_connection = 1