src/hotspot/share/gc/z/z_globals.hpp

*** 54,63 ****
--- 54,70 ----
            range(32*M, 1024*G)                                               \
                                                                              \
    experimental(uint, ZCollectionInterval, 0,                                \
            "Force GC at a fixed time interval (in seconds)")                 \
                                                                              \
+   experimental(bool, ZUncommit, true,                                       \
+           "Uncommit unused memory")                                         \
+                                                                             \
+   experimental(uintx, ZUncommitDelay, 5 * 60,                               \
+           "Uncommit memory if it has been unused for the specified "        \
+           "amount of time (in seconds)")                                    \
+                                                                             \
    diagnostic(uint, ZStatisticsInterval, 10,                                 \
            "Time between statistics print outs (in seconds)")                \
            range(1, (uint)-1)                                                \
                                                                              \
    diagnostic(bool, ZStatisticsForceTrace, false,                            \