[GR-46399] Set Xmx when building native images to use a reliable amount of memory

PullRequest: truffleruby/3901

Author: eregon

mx.truffleruby/mx_truffleruby.py

@@ -313,10 +313,14 @@ def verify_ci(args):
             jar_distributions=['truffleruby:TRUFFLERUBY-LAUNCHER'],
             main_class='org.truffleruby.launcher.RubyLauncher',
             build_args=[
+                '-J-Xmx5g', # Set Xmx to use a reliable amount of memory
                 '-H:+DumpThreadStacksOnSignal',
                 '-H:+DetectUserDirectoriesInImageHeap',
                 '-H:+TruffleCheckBlockListMethods'
             ],
+            build_args_enterprise=[
+                '-J-Xmx6g', # Set Xmx to use a reliable amount of memory
+            ],
             language='ruby',
             option_vars=[
                 'RUBYOPT',