DBMS OUTPUT SAVE LINES BEFORE DISABLE

declare
 v_dbms_array dbms_output.chararr;
 v_line_count integer:=1000000;
begin
 dbms_output.enable;
 dbms_output.put_line('1');
 dbms_output.put_line('2');
 dbms_output.get_lines(v_dbms_array, v_line_count);
 dbms_output.disable;
 dbms_output.enable;
 FOR i IN 1 .. v_line_count LOOP
  dbms_output.put_line(v_dbms_array(i));
 END LOOP;
 dbms_output.put_line('3');
end;
/