Freelancer from MUMBAI required - Advice required on Web Servers / Hosting / Architecture

Freelancer from MUMBAI required - Advice required on Web Servers / Hosting / Architecture

Cancelled

Job Description

Have an ongoing site which goes slow when more than 25 concurrent users log on. Sometimes it even crashes (once so far)

Not sure if the web architecture / configuration / server / hosting is appropriate

Need help and advice on the same

Application - Java + PHP
Web Server - Apache
App Server - Tom Cat
Hosted on - Dedicated Go Daddy Server with Windows OS