dbms_parallel_execute interval time between executions... Can it be reduced ??

  We want to use dbms_parallel_execute to create faster transactions over dblinks. As it stands dbms_parallel_execute does what we need it to do initially, however one problem we have encountered is that the interval for the next execute appears to take 3.5 seconds. We need one second or better. Can anyone explain how we can lower the 3.5 seconds?

 

Thanks