Originally Posted by olivierx

The 10k people on a day, are they skimmed traffic ( view only one pages then leave ) or they view many page?

If most of your traffic don't view more then one page, here what i'd suggest ( i did it on a host gator shared hosting , i had 100k daily visit while only 5% where viewing more then 1 page yea lot of skimmed traffic )

You make a manual cached file, index.html, all your traffic goes to your home page which is html, then if they view other page they go the the PHP.

If that doesnt work, you may try cloudflare, they saved me huge amount of traffic by caching most of the content.

If you have 100 active users and all of them making php request it is normal to have many process running. Static html home page is needed if you have too many users.

Good cache plugins will make many statics html page which visitor will only view html unless your site actually need to make new php request for every hit..