--- a/src/hotspot/share/gc/shenandoah/heuristics/shenandoahPassiveHeuristics.cpp	Thu Oct 10 10:48:31 2019 -0700
+++ b/src/hotspot/share/gc/shenandoah/heuristics/shenandoahPassiveHeuristics.cpp	Thu Oct 10 21:54:53 2019 +0200
@@ -60,8 +60,9 @@
   size_t available = MAX2(capacity / 100 * ShenandoahEvacReserve, actual_free);
   size_t max_cset  = (size_t)(available / ShenandoahEvacWaste);
 
-  log_info(gc, ergo)("CSet Selection. Actual Free: " SIZE_FORMAT "M, Max CSet: " SIZE_FORMAT "M",
-                     actual_free / M, max_cset / M);
+  log_info(gc, ergo)("CSet Selection. Actual Free: " SIZE_FORMAT "%s, Max CSet: " SIZE_FORMAT "%s",
+                     byte_size_in_proper_unit(actual_free), proper_unit_for_byte_size(actual_free),
+                     byte_size_in_proper_unit(max_cset),    proper_unit_for_byte_size(max_cset));
 
   size_t threshold = ShenandoahHeapRegion::region_size_bytes() * ShenandoahGarbageThreshold / 100;