You need SBT_OPTS
, here’s what I use in my .bash_profile:
export SBT_OPTS="-Xmx1536M -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=2G -Xss2M -Duser.timezone=GMT"
UPDATE:
To get your 2G heap space you can use this:
export SBT_OPTS="-Xmx2G -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=2G -Xss2M -Duser.timezone=GMT"
NOTE: SBT MUST BE LATEST VERSION
Older versions of sbt
contain bugs that override these settings, use brew upgrade sbt
for latest sbt
for Mac (assuming brew install) (IDK for Linux). https://github.com/sbt/sbt/issues/2945#issuecomment-277490848