Per this helpful post, I removed my ~/.sbtconfig, and added .sbtopts:
$cd myProject $cat .sbtopts -J-Xmx4G -J-XX:+CMSClassUnloadingEnabled -J-XX:MaxPermSize=4G Then I ran sbt. How can I, via the sbt console, verify those options set in .sbtopts?
3 Answers
If you man sbt, you'll see that there's a debug flag; so, you'll see something like this:
$ sbt -d [process_args] java_version = '1.7.0_72' # Executing command line: java -Xms1024m -Xmx1024m -XX:ReservedCodeCacheSize=128m -XX:MaxPermSize=256m -XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC -jar /usr/share/sbt-launcher-packaging/bin/sbt-launch.jar Here's my sbtopts file: /usr/share/sbt-launcher-packaging/conf/sbtopts
-J-XX:+CMSClassUnloadingEnabled -J-XX:+UseConcMarkSweepGC Latest versions of the jdk comes with a nice tool called jps that tells you about running java processes
jps -v should point you to the processes and show the passed-in options
I don't know if you can do it from within the sbt console but you can add -J-XX:+PrintFlagsFinal to .sbtopts and the JVM will print all the flags.
