On Thu, 2008-06-12 at 19:28 -0400, Bill Cole wrote: > At 1:17 AM +0300 6/13/08, Timo Sirainen wrote: > >On Thu, 2008-06-12 at 11:10 -0400, Bill Cole wrote: > > [...] > >> However, I DO clobber the dovecot-uidlist in .Trash as part of my > >> monthly housekeeping because it tends to get very large > > > >All the expunged messages get removed from it the next time a new > >message is added to the mailbox. So there should be no need to delete > >it. (v1.1 doesn't always recreate the file, but it gets rewritten if the > >resulting file would be 70% of the current size or less.) > > I confess to running 1.0.0, which apparently lacks this bit of housekeeping. > > At the moment I have no messages in my Trash folder (so there are no > files in ~/Maildir/.Trash/cur) and ~Maildir/.Trash/dovecot-uidlist > has 10273 lines, and the first messages listed are nowhere to be > found anywhere under Maildir.
As I said, they're removed *the next time a new message is added to the mailbox*. So basically it works like: 1. 1000 messages added to mailbox -> dovecot-uidlist has 1001 lines. 2. 1000 messages expunged from mailbox -> dovecot-uidlist has 1001 lines. 3. 1 message added to the mailbox -> dovecot-uidlist has 2 lines. Neither v1.0 nor v1.1 updates dovecot-uidlist when messages are expunged. I don't know if it should - it's just unnecessary extra disk I/O, but I guess if the space savings are large maybe it should..
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