Android Circle Gradle Warning: The build VMs have a memory limit of 4G

Question

Trying to run my Gradle Android project on circleci.com I got the following Warning:

Warning: The build VMs have a memory limit of 4G. Your build hit this limit on one or more containers, and your build results are likely invalid.

Answer 1

The GRADLE_OPTS can be set in the circle.yml file:

machine:
   environment:
     GRADLE_OPTS: -Xmx512m -XX:MaxPermSize=512m

Allowing you to keep development configs and build configs separate.

Edit:

CircleCi have updated their documentation, this is the recommended config for Android builds:

machine:
  environment:
    GRADLE_OPTS: '-Dorg.gradle.jvmargs="-Xmx2048m -XX:+HeapDumpOnOutOfMemoryError"'