Does anyone know what the current status on using mmap() on HP-UX is? Cyrus documentation only mentions HP-UX 9 and 10 as not working (probably because that chapter is just old) but I think 11.11 is supposed to be greatly improved in this area.
Cyrus 2.0.16 has been running just fine with no_mmap, though; the reason I'm asking is that I tried getting rid of BDB (a general nuisance) during an 2.1 upgrade, but skiplist is unusably slow without mmap(). With some 50000 mailboxes, initial startup took over an hour, and deleting a user kept that particular imapd spinning for over 30 minutes of CPU time! I'm not quite sure where the problem was since deleting sub-mailboxes (user.account.mailbox) worked quite snappy; however, after I reverted to DB 4.1 as the mailbox database backend, all was back to normal. If no-one has tried this on 11.11, I probably will, but what are the problems I should look for, and what kind of usage would trigger them? --mika
