今天发了个链接，可能同时在线的人瞬间比较多，结果网站报503错误，回去打开php-fpm错误日志一看，php-fpm服务挂掉了，报如下错误：
[04-Apr-2016 15:38:04] NOTICE: systemdmonitorintervalsetto 10000ms [05-Apr-2016 19:03:08] WARNING: [poolwww] seemsbusy (youmayneedto increasepm.start_servers, or pm.min/max_spare_servers), spawning 8 children, thereare 0 idle, and 29 totalchildren [05-Apr-2016 19:03:09] WARNING: [poolwww] seemsbusy (youmayneedto increasepm.start_servers, or pm.min/max_spare_servers), spawning 16 children, thereare 0 idle, and 34 totalchildren [05-Apr-2016 19:03:11] WARNING: [poolwww] seemsbusy (youmayneedto increasepm.start_servers, or pm.min/max_spare_servers), spawning 32 children, thereare 0 idle, and 39 totalchildren [05-Apr-2016 19:03:12] WARNING: [poolwww] seemsbusy (youmayneedto increasepm.start_servers, or pm.min/max_spare_servers), spawning 32 children, thereare 0 idle, and 44 totalchildren [05-Apr-2016 19:03:13] WARNING: [poolwww] seemsbusy (youmayneedto increasepm.start_servers, or pm.min/max_spare_servers), spawning 32 children, thereare 0 idle, and 49 totalchildren [05-Apr-2016 19:03:14] WARNING: [poolwww] serverreachedpm.max_children setting (50), considerraisingit
