foo.diff

diff --git a/src/gc/orchestrate.c b/src/gc/orchestrate.c
index 6309a8a7..ab934414 100644
--- a/src/gc/orchestrate.c
+++ b/src/gc/orchestrate.c
@@ -303,7 +303,7 @@ static MVMint32 is_full_collection(MVMThreadContext *tc) {
     if (uv_resident_set_memory(&rss) < 0 || rss == 0)
         rss = 50 * 1024 * 1024;
     percent_growth = (100 * promoted) / rss;
-    return percent_growth >= MVM_GC_GEN2_THRESHOLD_PERCENT;
+    return percent_growth >= MVM_GC_GEN2_THRESHOLD_PERCENT || promoted > 30000000;
 }
 
 static void run_gc(MVMThreadContext *tc, MVMuint8 what_to_do) {