[ovirt-devel] Updated Engine build options

[Vojtech Szocs]

Hi guys,

patch http://gerrit.ovirt.org/#/c/36739/ just landed in master branch.

It adds two new Makefile variables:

  # Maven JVM options.
  BUILD_JAVA_OPTS_MAVEN
  
  # GWT compiler & DevMode JVM options.
  BUILD_JAVA_OPTS_GWT

Use BUILD_JAVA_OPTS_MAVEN to specify JVM arguments for main "mvn" command.
Default value is "-XX:MaxPermSize=512M" which should be OK for most cases.

Use BUILD_JAVA_OPTS_GWT to specify JVM arguments for GWT compiler & DevMode.
Default value is "" which translates into following fallback value:

  # gwt.jvmArgs fallback in frontend/webadmin/modules/pom.xml
  -Xms1024M -Xmx8192M -XX:PermSize=512M -XX:MaxPermSize=1024M

Custom BUILD_JAVA_OPTS_GWT (non-empty string) value will be translated into
-Dgwt.jvmArgs="..." when invoking main "mvn" command.

TL;DR Engine build should work without any JVM argument tuning as before.

If you're running into "java.lang.OutOfMemoryError" during the build,
we suggest to limit max. simultaneous GWT permutation worker threads
to 1 and tune GWT compiler JVM arguments according to your system:

  $ export BUILD_JAVA_OPTS_MAVEN="-XX:MaxPermSize=512M -Dgwt.compiler.localWorkers=1"
  $ export BUILD_JAVA_OPTS_GWT="-Xms1024M -Xmx4096M -XX:MaxPermSize=1024M"

Regards,
Vojtech