request_slowlog_timeout = 1
slowlog = /usr/local/php-fpm/var/log/www-slow.log
测试：
/usr/local/php-fpm/sbin/php-fpm -t
/etc/init.d/php-fpm reload
ls ../../var/log/ ????//生成日志
php-fpm.log ?www-slow.log
配置nginx的虚拟主机test.com.conf，把unix:/tmp/php-fcgi.sock改为unix:/tmp/www.sock(可以不改sock)
重新加载nginx服务
vim /data/wwwroot/test.com/sleep.php//写入如下内容
<?phpecho "test slow log";sleep(2);echo "done";?>
curl -x127.0.0.1:80 test.com/sleep.php
cat /usr/local/php-fpm/var/log/www-slow.log
[12-Dec-2017 17:45:14] ?[pool www] pid 58346
script_filename = /data/wwwroot/lsx.com/sleep.php
[0x00007f066c246fe0] sleep() /data/wwwroot/lsx.com/sleep.php:3
php-fpm慢执行日志
原文地址：http://blog.51cto.com/lsxme/2059565