查看pid位置 

cat /etc/php-fpm.conf

pid = /usr/local/php/var/run/php-fpm.pid

#测试php-fpm配置
/usr/local/php/sbin/php-fpm -t
/usr/local/php/sbin/php-fpm -c /usr/local/php/etc/php.ini -y /usr/local/php/etc/php-fpm.conf -t

#启动php-fpm
/usr/local/php/sbin/php-fpm
/usr/local/php/sbin/php-fpm -c /usr/local/php/etc/php.ini -y /usr/local/php/etc/php-fpm.conf

#关闭php-fpm
kill -INT `cat /usr/local/php/var/run/php-fpm.pid`

#重启php-fpm
kill -USR2 `cat /usr/local/php/var/run/php-fpm.pid`

查看php-fpm进程数：
ps aux | grep -c php-fpm

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