--- old/src/hotspot/share/gc/cms/cmsHeap.cpp	Fri Jun 21 17:34:02 2019
+++ new/src/hotspot/share/gc/cms/cmsHeap.cpp	Fri Jun 21 17:34:01 2019
@@ -62,7 +62,7 @@
   }
 
   size_t used_in_bytes() {
-    return _space->used();
+    return _space->used_stable();
   }
 };