--- old/src/hotspot/share/services/virtualMemoryTracker.cpp	2018-04-24 07:16:38.777261502 +0200
+++ new/src/hotspot/share/services/virtualMemoryTracker.cpp	2018-04-24 07:16:38.617261514 +0200
@@ -516,7 +516,7 @@
 
   size_t free_in_bytes = (MetaspaceUtils::capacity_bytes(type) - MetaspaceUtils::used_bytes(type))
                        + MetaspaceUtils::free_chunks_total_bytes(type)
-                       + MetaspaceUtils::free_bytes(type);
+                       + MetaspaceUtils::free_in_vs_bytes(type);
   mss._free_in_bytes[type] = free_in_bytes;
 }