diff -r 05df7e64ecfc -r b6335181f2c6 hotspot/src/share/vm/runtime/globals.hpp
--- a/hotspot/src/share/vm/runtime/globals.hpp	Fri Feb 05 08:59:36 2016 +0100
+++ b/hotspot/src/share/vm/runtime/globals.hpp	Fri Feb 05 14:00:58 2016 +0100
@@ -3947,7 +3947,7 @@
   product(bool, PerfDisableSharedMem, false,                                \
           "Store performance data in standard memory")                      \
                                                                             \
-  product(intx, PerfDataMemorySize, 64*K,                                   \
+  product(intx, PerfDataMemorySize, 32*K,                                   \
           "Size of performance data memory region. Will be rounded "        \
           "up to a multiple of the native os page size.")                   \
           range(128, 32*64*K)                                               \