On Dec 4, 2009, at 8:58 AM, Michael Durket wrote: > I'm wondering if the problem here is that all the mailboxes for these users > are in mbox > format and that format just poses too much of a burden on Dovecot.
If you haven't yet set mbox_very_dirty_syncs=yes, doing it should help. > I personally as an > experiment have been using Maildir format and that seems to work fine. Would > people > on this forum (who probably deal with larger numbers of users and mailboxes > than my > system does) recommend that I switch the mailboxes over to Maildir format to > alleviate > the disk busy problems? Depends on usage patterns, but I guess it could help. With v1.2 you could also set maildir_very_dirty_syncs=yes to improve its performance. > Are there any issues to watch out for when converting mailboxes > from mbox to Maildir format? Make sure IMAP UIDVALIDITY + UIDs are preserved. Apparently the mb2md.py script in http://wiki.dovecot.org/Migration/MailFormat can do it. And do you have POP3 users? Their UIDLs should also be preserved.
