Hi Amos, thanks your your response.Please share me any document for delay pool to understand it in exact manner as it works.I tried to find from internet but it is very confusing to me. As per squid document, there are class object in that they are using terms like aggregate , network and individual terms. What does that mean? What is the restore and max terms which used in delay_pool parameters? Please try to solve my doubts with any good practical example. Thanks, Benjamin