[Dovecot] Huge IMAP folder takes forever

[Peter Lindgren]

Hi!
Just updated to 1.0 rc15, but the problem remains. I think it could be 
client-dependent to some extent.

I have only IMAPS access and Maildir. I have one mailbox which contains 
some 10,200 mails. That mailbox takes forever (have waited 30 minutes 
and then aborted) to open with Thunderbird 1.5.0.7. Other mailboxes 
(like dovecot :-), only 6984 mails) opens quickly.

When Thunderbird tries to open this folder, the imap process on the 
server uses roughly all cpu resources. There isn't much disk I/O, at 
least as far as I can tell by listening at the server.

The dovecot is upgraded from 0.99.something. Should I remove index files 
first, and in that case which? Is there something cached in Thunderbird?

Here's the directory listing for the troublesome folder:

-rw-------   1 peter  peter       28 Jan  7  2006 .customflags
-rw-------   1 peter  peter    49248 Feb  7  2006 .imap.index
-rw-------   1 peter  peter   420998 Feb  7  2006 .imap.index.data
-rw-------   1 peter  peter    10256 Feb  7  2006 .imap.index.log
-rw-------   1 peter  peter    49200 Feb  7  2006 .imap.index.tree
drwx------   2 peter  peter   686592 Dec 10 15:06 cur
-rw-------   1 peter  peter       64 Jun  6  2006 dovecot-keywords
-rw-------   1 peter  peter   619832 Dec 10 15:04 dovecot-uidlist
-rw-------   1 peter  peter   162992 Dec 10 15:21 dovecot.index
-rw-------   1 peter  peter  8826880 Dec  9 15:36 dovecot.index.cache
-rw-------   1 peter  peter    33776 Dec 10 15:22 dovecot.index.log
-rw-------   1 peter  peter   193660 Dec  3 12:50 dovecot.index.log.2
drwx------   2 peter  peter      512 Dec 10 15:06 new
drwx------   2 peter  peter      512 Dec 10 15:04 tmp

Thanks in advance,
Peter
-- 
Peter Lindgren, dataingenjör
E-post: peter "at" norrskenkonsult punkt com
http://www.norrskenkonsult.com