--- old/src/share/vm/gc/g1/g1_globals.hpp	2015-08-26 14:15:05.658498957 +0200
+++ new/src/share/vm/gc/g1/g1_globals.hpp	2015-08-26 14:15:05.579496607 +0200
@@ -82,9 +82,10 @@
           "If true, enable reference discovery during concurrent "          \
           "marking and reference processing at the end of remark.")         \
                                                                             \
-  experimental(size_t, G1ExpectedAveragePLABOccupancyPercent, 50,           \
-               "Expected average occupancy of PLABs after GC in percent.")  \
-               range(0, 100)                                                \
+  experimental(double, G1LastPLABAverageOccupancy, 50.0,                    \
+               "The expected average occupancy of the last PLAB in "        \
+               "percent.")                                                  \
+               range(0.001, 100.0)                                          \
                                                                             \
   product(size_t, G1SATBBufferSize, 1*K,                                    \
           "Number of entries in an SATB log buffer.")                       \