php5.3.3以前php-fpm还没有被php收录，配置php基本都在php.ini里面，php5.3.3及以后，除了在php.ini配置以外，还可以在php-fpm.conf里面配置。
多个地方都可以配置的话，就存在一个优先级。php-fpm.conf优先级比php.ini高。
1，修改/etc/php-fpm.conf，或者，/etc/php-fpm.d/*.conf，或者，/usr/local/php/etc/php-fpm.conf
; Set session path to a directory owned by process user ;php_value[session.save_handler] = files ;php_value[session.save_path] = /var/lib/php/session php_value[session.save_handler] = redis php_value[session.save_path] = "tcp://127.0.0.1:6379"
如果php-fpm.conf设置了save_handler，那么php.ini的配置就不会起作用。
2，php-fpm成为内置进程
[root@localhost workspace]# php-fpm -v PHP 5.3.3 (fpm-fcgi) (built: Dec 11 2013 03:32:01) Copyright (c) 1997-2012 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies [root@localhost workspace]# php-cgi -v PHP 5.3.3 (cgi-fcgi) (built: Dec 11 2013 03:28:11) Copyright (c) 1997-2010 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies
