--- a/src/hotspot/share/gc/shenandoah/shenandoahPacer.cpp	Tue Apr 09 12:17:03 2019 -0700
+++ b/src/hotspot/share/gc/shenandoah/shenandoahPacer.cpp	Tue Apr 09 21:20:15 2019 +0200
@@ -153,7 +153,7 @@
 void ShenandoahPacer::setup_for_idle() {
   assert(ShenandoahPacing, "Only be here when pacing is enabled");
 
-  size_t initial = _heap->capacity() * ShenandoahPacingIdleSlack / 100;
+  size_t initial = _heap->max_capacity() * ShenandoahPacingIdleSlack / 100;
   double tax = 1;
 
   restart_with(initial, tax);
@@ -166,7 +166,7 @@
   if (_progress == -1) {
     // First initialization, report some prior
     Atomic::store((intptr_t)PACING_PROGRESS_ZERO, &_progress);
-    return (size_t) (_heap->capacity() * 0.1);
+    return (size_t) (_heap->max_capacity() * 0.1);
   } else {
     // Record history, and reply historical data
     _progress_history->add(_progress);