How to unlimited web users

Hi !
A problem that bumped up to 100-110 visitors what the page allows . the number of visitors coming to me would be 300-350 . What causes it to 100 visitors railing and the other is unable to access the page.
- Excuse my English is very poor -

I believe this will solve your problem:
http://stackoverflow.com/questions/3389496/how-do-you-increase-the-max-number-of-concurrent-connections-in-apache