src/hotspot/share/runtime/arguments.cpp

*** 3525,10 ***
--- 3525,16 ---
        // If neither on the command line, the defaults are incompatible, but turn on UseObjectMonitorTable.
      } else {
        FLAG_SET_DEFAULT(UseObjectMonitorTable, true);
      }
    }
+   if (UseCompactObjectHeaders && FLAG_IS_DEFAULT(hashCode)) {
+     hashCode = 6;
+   }
+   if (UseCompactObjectHeaders && FLAG_IS_DEFAULT(CompressedClassSpaceSize)) {
+     FLAG_SET_DEFAULT(CompressedClassSpaceSize, CompressedKlassPointers::max_klass_range_size_coh);
+   }
  #endif
  }
  
  jint Arguments::apply_ergo() {
    // Set flags based on ergonomics.