--- old/src/hotspot/share/gc/cms/cmsHeap.cpp	Thu Aug  8 22:01:29 2019
+++ new/src/hotspot/share/gc/cms/cmsHeap.cpp	Thu Aug  8 22:01:28 2019
@@ -62,7 +62,7 @@
   }
 
   size_t used_in_bytes() {
-    return _space->used();
+    return _space->used_stable();
   }
 };