src/hotspot/share/runtime/globals.hpp

@@ -126,11 +126,11 @@
                                                                              \
    product(bool, AOTCompatibleOopCompression, false, DIAGNOSTIC,             \
            "Always use HeapBasedNarrowOop mode, so that AOT code will "      \
            "always work regardless of runtime heap range")                   \
                                                                              \
-   product(bool, UseCompactObjectHeaders, true,                              \
+   product(bool, UseCompactObjectHeaders, false,                             \
            "Use compact 64-bit object headers in 64-bit VM")                 \
                                                                              \
    product(int, ObjectAlignmentInBytes, 8,                                   \
            "Default object alignment in bytes, 8 is minimum")                \
            range(8, 256)                                                     \