php7.0-fpm.log显示每秒产生数百个孩子,然后被立即销毁.这种情况不停发生.日志看起来像这样：

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4980 started

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4978 exited with code 0 after 0.014658 seconds from start

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4981 started

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4980 exited with code 0 after 0.014354 seconds from start

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4982 started

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4979 exited with code 0 after 0.015170 seconds from start

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4983 started

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4981 exited with code 0 after 0.014709 seconds from start

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4984 started

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4982 exited with code 0 after 0.014741 seconds from start

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4985 started

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4983 exited with code 0 after 0.014727 seconds from start

[09-Mar-2017 02:58:25] NOTICE: [pool www] child 4986 started

/etc/php/7.0/fpm/php-fpm.conf中的设置：

pid = /run/php/php7.0-fpm.pid

error_log = /var/log/php7.0-fpm.log

include=/etc/php/7.0/fpm/pool.d/*.conf

/etc/php/7.0/fpm/pool.d/www.conf中的设置：

pm = dynamic

pm.max_children = 5

pm.start_servers = 2

pm.min_spare_servers = 1

pm.max_spare_servers = 3

;pm.process_idle_timeout = 10s;

;pm.max_requests = 500

catch_workers_output = yes

php_flag[display_errors] = on

php_admin_value[error_log] = /var/log/phperrors.log

php_admin_flag[log_errors] = on

所有其他行都注释掉了; (默认设置).这是Ubuntu 16.04,使用默认包. PHP和Nginx版本如下：

php-fpm7.0 -v

PHP 7.0.13-0ubuntu0.16.04.1 (fpm-fcgi)

Copyright (c) 1997-2016 The PHP Group

Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies

with Zend OPcache v7.0.13-0ubuntu0.16.04.1, Copyright (c) 1999-2016, by Zend Technologies

nginx -v

nginx version: nginx/1.10.0 (Ubuntu)

没有进行调整(除了启用日志记录).此服务器尚未部署到生产环境,因此没有用户负载.

为什么php-fpm产生并立即每秒摧毁数百名儿童？这是一个配置错误,还是Ubuntu 16.04附带了一个错误的php-fpm版本？