After finishing, the website structure, and php coding, now i want to launch it online.
But it will be under a heavy traffic about 400 visitors every second, when it will be launched online, and i wanted some expert opinions, about the cache.

- What kind of cache i should use ? APC or eAccelerator ?
- I have already installed memcached, will this be in conflict with APC or eAccelerator ?
- Where can i read about how to configure the caches ? any suggestion about an optimal configuration ?
- What about to cache only some pages and not all the website, is this possible, if yes, please can give any kind of example ?

Thank you for reading this message
Best Regards