--- jdk8/hotspot/src/share/vm/runtime/globals.hpp	2014-04-23 22:06:29.000000000 +0100
+++ jdk8/hotspot/src/share/vm/runtime/globals.hpp	2014-05-12 20:42:01.633428300 +0100
@@ -3113,7 +3113,7 @@
   product(uintx, InitialHeapSize, 0,                                        \
           "Initial heap size (in bytes); zero means use ergonomics")        \
                                                                             \
-  product(uintx, MaxHeapSize, ScaleForWordSize(96*M),                       \
+  product(uintx, MaxHeapSize, ScaleForWordSize(512*M),                      \
           "Maximum heap size (in bytes)")                                   \
                                                                             \
   product(uintx, OldSize, ScaleForWordSize(4*M),                            \