We are trying to move one of our web-services (Java) to the cloud from a development server, here are the details:
There is a PHP front-end, connecting to a Java-based web-service that is connected to a MySQL database (all requests to the database are sent from the web-service, the php part is communicating with the Java back-end only, no direct connection to the database).
Start Point
Dev Server - CentOS (cPanel), 765MB-1.5GB RAM, 4CPU, Tomcat 7
*the software is running fast, no speed issues, logs show normal CPU and memory usage
Scenario #1
PHP front-end on Elastic Beanstalk and Java web-service with database on Elastic Beanstalk
*the software is about 80% slower, logs show normal CPU and memory usage
Scenario #2
PHP front-end on VPS (same company/location with Jelastic) and Java web-service with database on Jelastic
*the software is about 70% slower, logs show normal CPU and memory usage
Scenario #3
PHP front-end on VPS, Java web-service with database on Elastic Beanstalk and Jelastic (swithing)
*the software is about 70-80% slower, logs show normal CPU and memory usage on both cloud environments
What I figured out, no matter where the PHP front-end is located, that will load fast, nothing to search here.
As soon as the Java back-end is moved from the VPS to the cloud (doesn't matter if Amazon or Jelastic), the whole software slows down extremely. Based on the logs and since we tried with two providers, this doesn't seem like a resource issue.
It cannot be a connection issue since we tried to have the PHP and Java in the same environment (Scenario #1).
It is either the Java web-service slowing down extremely (for unknown reason as logs show low resource usage) or it could be the connection between the Java application and the database (I doubt since in the first scenario, all three components are on Amazon, same environment, location).
Anyone ever had such an issue before? Any ideas? Thank you!
(note, I have zero experience with cloud hosting)
