服务器是1核心2GB内存，有时候网站系统并发在100左右就扛不住压力，top查看，php-fpm有10几个进程。 cpu占用直接飙到 98%，我就说今天上午为什么这么安静，没人了。查看了下后台支付订单只有10个左右，并且卡到实在难以忍受。打开后台也要1分多钟。

听了下老司机的建议是配置下 php-fpm.conf

vim /usr/local/php/etc/php-fpm.conf

[www]
listen = /tmp/php-cgi.sock
listen.backlog = -1
listen.allowed_clients = 127.0.0.1
listen.owner = www
listen.group = www
listen.mode = 0666
user = www
group = www
pm = dynamic
pm.max_children = 8
pm.start_servers = 4
pm.min_spare_servers = 4
pm.max_spare_servers = 4
pm.max_requests = 800
request_terminate_timeout = 100
request_slowlog_timeout = 0
slowlog = var/log/slow.log