I want to know how to find the site no.of visitors maximum allowed ,
for example i want to develop a site ,but i don't know how many no.of users can acess the site maximum.
Is it possible to know and improve this visiting users capacity through PHP code.
I think google,Yahoo,amazon sites millions of users are browsing ,But the sites are not crashed.
How we can maintain the site like that
what are the development causes involved to develop and maintain site like that.