If you have multiple CPUs you can assign different tasks to different CPUs in Windows XP - or is that not what you are talking about? You can also give Tasks priortity (at least in a coarse way Idle, Low, Normal, High and RealTime).
I seem to recall a utility that a certain cat fancier made available on here called Process Tamer too ...
I do use Process Tamer. But I do tend to get a little (OK - a lot!) impatient when I try to pause indexing and the search engine just ignores me! Hate that!
All of the desktop searches can continue indexing when you don’t want them to do so, but Copernic 2 was the first that seemed to go out of control on me. Plus as I mentioned it wouldn’t find certain files at all, even though they were definitely in the index. MP3's for example.
I wrote to Copernic but got no reply, which was unusual in my experience with them. Then I noticed that there were a lot of posts around the various forums about similar issues. I think it might have been V. 2.5 right after it was released.
All of the desktop search engines seem to hit a point where the index gets corrupted and you have to dump the index and re-index all your files. Also, I have a few HDD's here, so it's a lot of data that they have to index on my desktop PC. I think that the larger the index you have, the more likely it is to get corrupted after a while.
X1 was always the best for me. It seemed to give me the least trouble of all I have tried. At least of the indexing type. But for some reason I cannot get a hold of them anymore! I used to be a member of their forum but earlier this year I tried and it said my email address was banned - I never posted more than a few innocent questions, so I don’t know what that is about. Since they don’t offer it free anymore I decided to purchase the Pro version but I can't login there and they haven't replied to my email requests. What's frustrating is that they still send me requests to participate in their web meetings!
PS - Carol, I never even considered separating the processes by processor. I've never tried that. Does it work well? Thanks! Jim