diff -r b553ad95acf0 -r baa4dd528de0 src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
--- a/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp	Mon Sep 09 12:42:01 2019 -0700
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp	Mon Sep 09 16:54:48 2019 -0400
@@ -343,11 +343,13 @@
     Copy::fill_to_bytes(_liveness_cache[worker], _num_regions * sizeof(jushort));
   }
 
-  // The call below uses stuff (the SATB* things) that are in G1, but probably
-  // belong into a shared location.
-  ShenandoahBarrierSet::satb_mark_queue_set().initialize(this,
-                                                         20 /* G1SATBProcessCompletedThreshold */,
-                                                         60 /* G1SATBBufferEnqueueingThresholdPercent */);
+  // There should probably be Shenandoah-specific options for these,
+  // just as there are G1-specific options.
+  {
+    ShenandoahSATBMarkQueueSet& satbqs = ShenandoahBarrierSet::satb_mark_queue_set();
+    satbqs.set_process_completed_buffers_threshold(20); // G1SATBProcessCompletedThreshold
+    satbqs.set_buffer_enqueue_threshold_percentage(60); // G1SATBBufferEnqueueingThresholdPercent
+  }
 
   _monitoring_support = new ShenandoahMonitoringSupport(this);
   _phase_timings = new ShenandoahPhaseTimings();