> I don't know how > I'll know if I see performance issues relating to the signup files, The main symptom is that users are complaining about slow login time in the web interface. I have to say that I have not personally heard that in the last few years (which does not mean nobody has experienced it). Most people have at least 1GHz, 1G RAM and high-density 7200rpm drives. With that hardware, you can do a lot of web logins per second even with oversized SIGNUP files. It was different back when drives had transfer rates in the 3M/sec range. If your SIGNUP file grew to, say, 10M, in a worst-case scenario and without HPO it could take 3 seconds to log in, and that is not acceptable. With an entry-level anno 2005 drive, that same file would take less than 0.5 sec to read. I've also found another reason why REGISTER OFF is slow: it is a wildcard search. I think this command was added primarily to clean up last year's student data before registration. Anyway, it was not meant for intensive use. You would get better performance with FOR xxx REGISTER OFF, but that would not be silent. Eric