How to set heap size for sbt?

Question

I am using SBT 0.12.0. I have read other answers on stack overflow and followed them, however none of them helps, for example:

• create ForkRun clas

Answer 1

In my case, the configuration of my service was overwriting the environment variable SBT_OPTS and JAVA_OPTS. I was able to set the limits by setting in my build.sbt the following:

javaOptions in Universal ++= Seq(
  "-J-Xms1g",
  "-J-Xmx2g")

Reference: https://www.scala-sbt.org/sbt-native-packager/archetypes/java_app/customize.html