AWS Elastic Beanstalk and JAVA_OPTS

Question

I have a java application which is deployed to Elastic Beanstalk. There are two environments: test and production, production is configured to use bigger instances than test. With the default config for java environment max heap size is around 1/4 of all instance RAM (for 2G RAM instance it's about 0.5G) and I'd like to increase it ( -Xmx ). Available options are:

• using .ebextensions - this way config for both environment will be the same (not good)
• using Procfile - the same as above
• using Environment properties in console does not work - those properties are passed to application ( -D ), not to java .

Any ideas how to set -Xmx depending on environment / available memory size? Thanks

Answer 1

I think of two ways to resolve the issue:

1. two sets of .ebextensions , one for test and one for prod , when you do the app package, just put .ebextensions under webapp folder, it will be picked up by Beanstalk

2. customized catalina.sh to grep the free memory and adjust the -Xmx accordingly.