What is Memcache ?

Memcached is a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.

What is APC ?

I assume you have memcached daemon installed and running in your server.
If you still don't have memcached daemon running on your server, you need to install memcached daemon first.

You can follow this link for Installing Memcached daemon
[code]http://wowtutorial.org/en/tutorial/63.html [/code]

In order to connect to memcached daemon with PHP extension,
First we need to reconfigure PHP to support memcache extension

Reconfigure PHP

What is Memcached?

Memcached is a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.

How it Works?