Hello All, I have some doubt related to SharePoint portal server 2003 as well as MOSS 2007 which is as follows: I am working on the search service. So I want to know if Ifilter is single threaded, will documents be in the waiting queue for crawling? If yes, then in this condition, Active queue length performance counter should be incremented or not? And if no, then in which condition Active queue length performance counter will be incremented? Please provide some knowledgeable links or Documents links to get more details about it. Thanks in Advance, Gopal Lal