近期一台高负荷web服务器（litespeed）经常出现进程异常退出的问题，看日志。
2018-11-05 10:32:57.009170 [NOTICE] Apache configuration file has changed, restart gracefully to apply the change …
2018-11-05 10:32:57.010803 [INFO] [220.181.108.120:18975] connection to [uds://tmp/lshttpd/APVH_vyrzhent_Suphp.sock] on request #0, confirmed, 0, associated process: -1, running: 0, error: Resource temporarily unavailable
尝试解决方法：
service lsws restart 重启 Litespeed，登录litespeed web console ，找到 CGI Settings 。
尝试修改：
Process Soft Limit
和
Process Hard Limit
参阅文献：
https://www.litespeedtech.com/docs/webserver/config/extapps/lsapi#procSoftLimit