do some extra sleep while running low on memory

(1 sec. per outofmemoryCycle)

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7879 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/net/yacy/kelondro/workflow/AbstractBusyThread.java

@@ -198,9 +198,8 @@ public abstract class AbstractBusyThread extends AbstractThread implements BusyT
                 // do a clean-up
                 this.freemem();
                 // sleep a while
-                ratz(this.idlePause);
+                ratz(this.idlePause + 1000*(outofmemoryCycles++));
                 idletime += System.currentTimeMillis() - timestamp;
-                outofmemoryCycles++;
             }
         }
         this.close();