Java Heap Allocation for Tomcat on EC2 Instance

Question

I am writing a Java servlet that I plan to deploy to Amazon AWS using Elastic Beanstalk. My tests show that everything works well using the Small EC2 instance, using their Tomcat AMI stock, which uses Beanstalk.

I am trying to figure out how to properly allocate Java heap space for this configuration. A small instance has 1.7 GB of memory, so I think a bunch of 1024 MB will work well. I understand that memory will be needed for other things, although the only "real" purpose of this instance is to run Tomcat. And I also know that there is a point with large heaps where the standard Sun / Oracle JVM does not really work.

Is this a smart way to allocate memory? Should I use more or less? What tools can I use to determine the best configuration?

Answer 1

1024 looks ok maybe a little.

I'm not quite sure what your servlet is doing, but in order to give you an idea, I have an e-commerce application with about 1000 daily users working on two small copies of ec2. Tomcat downloads are distributed via mod_jk.

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Answer 2

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