title: How to know the Number of Core and RAM Required?
body: <p>I have a Spring Application which is running on Apache Tomcat 7 and is fully providing REST based services. I have around 1 Million people who would be using it across the globe. My question is that is there any standard way for calculating the number of Processors required as well the RAM required for such a site. Since I have the most at my disposal but I would like to order the product wisely. I am seriously looking ahead for a formula or something that can make me do such an estimate. Please point me to this.</p>
  
  <p>Or Please point me to the various constraints that should be taken into account in order to get such an infrastructure up and running. I would like you to point the requirements for </p>
  
  <ol>
  <li>webserver with apache running</li>
  <li>app server with Tomcat running</li>
  <li>database server with Redis,postgres and mongodb running.</li>
  </ol>
  
  <p>Thanks a ton.</p>