Problems encountered:
This problem is mainly Linux server installation memcached service, phpinfo information does not memcache extension, so mainly to the PHP installation memcache extension, the tutorial is to install memcache extension, I think it should be installed memcached extension , it is not very clear on this point.
Tutorial Links 1:http://blog.csdn.net/hel12he/article/details/45537059
Link 2:http://blog.csdn.net/poechant/article/details/6802312
The Linux command to install the memcache extension in link 1./configure--enable-memcache--with-php-config=/usr/local/php5/bin/php-config-- With-zlib-dir, this sentence can be copied in link 2, link 1 is not available.
At this point, memcached is half the installation complete, PHP memcached extension is not installed. Server memcached after installation, the page picture loading speed significantly faster.
CentOS installation memcached and memcache extensions for PHP configuration