threahold 10 is too low.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@5473 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/widgets/HistoryWidget.java

@@ -123,7 +123,7 @@ public class HistoryWidget<O extends ModelObject,T> extends Widget {
         req.getView(this,"ajaxBuildHistory.jelly").forward(req,rsp);
     }
 
-    private static final int THRESHOLD = 10; // while debugging
+    private static final int THRESHOLD = 30;
 
     public String getNextBuildNumberToFetch() {
         return nextBuildNumberToFetch;