--- a/src/hotspot/share/gc/z/zPageAllocator.cpp	Tue Sep 24 11:49:48 2019 +0200
+++ b/src/hotspot/share/gc/z/zPageAllocator.cpp	Tue Sep 24 10:04:13 2019 +0000
@@ -94,7 +94,7 @@
                                size_t max_capacity,
                                size_t max_reserve) :
     _lock(),
-    _virtual(),
+    _virtual(max_capacity),
     _physical(),
     _cache(),
     _min_capacity(min_capacity),