How are people tuning their systems to take Listserv's wide fluctuations of resource usage into account? Are you running it on a system with a large guest such as MVS, VSE or MUSIC? Has anyone looked into what is required to not sort the LIST after every subscription? I have a couple of large lists (>1000 subscribers) that whenever a SUBSCRIBE command happens, you can go out to lunch. I inserted Say TIME('R') before and after the LSVSORT in LSVSUBSC, and that is where the coffee break is occuring, almost 1,000 seconds. I do NOT want to peer this list out, and even if I could, I have been looking into a local list that would have almost that many local users, which even if I peered, would still all be here. It would seem possible to have the subscription NOT sort the list but mark the list as needing sorting, and only sort for things like PUT, REVIEW and when a file or mail is about to be delivered on the list, and the list is not via Distribute. My understanding of the sorting is that the sorted list is used to know who to combine into 1 mail file when sending mail to a non Mail-Via= Distribute list. Has anyone run CMAP on Listserv with a detail at the EXEC level? Harry