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
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; 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
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[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
