--- old/src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp	2010-04-13 08:11:17.000000000 -0700
+++ new/src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp	2010-04-13 08:11:16.000000000 -0700
@@ -447,7 +447,12 @@
       size_t promoted = old_gen->used_in_bytes() - old_gen_used_before;
       size_policy->update_averages(_survivor_overflow, survived, promoted);
 
-      if (UseAdaptiveSizePolicy) {
+    if (PSResizeByFreeRatioWithSystemGC &&
+        gc_cause == GCCause::_java_lang_system_gc) {
+      ParallelScavengeHeap* heap = (ParallelScavengeHeap*) Universe::heap();
+      heap->resize_by_free_ratio(false);
+
+    } else if (UseAdaptiveSizePolicy) {
         // Calculate the new survivor size and tenuring threshold
 
         if (PrintAdaptiveSizePolicy) {