On 2016-10-31 22:04, Timo Sirainen wrote:

Oct 31 10:52:37 imap([email protected]): Warning: Locking transaction log file /mnt/nfs/xxx.xx/xxx/indexes/dovecot.list.index.log took 31 seconds (syncing) Oct 31 10:52:37 imap([email protected]): Warning: Locking transaction log file /mnt/nfs/xxx.xx/xxx/indexes/dovecot.list.index.log took 31 seconds (syncing)

This just means something is being slow. Not necessarily a problem.
Although it could also indicate a deadlock. Is this Maildir? Did you
say you were using lock_method=dotlock?

I removed dotlock some time ago (using director) and switched to:

lock_method = fcntl
mail_fsync = always

With "count" as quota backend I get a lot of these errors on the director:

imap-login: Error: proxy([email protected]): Login for xxx.xxx.xxx.xxx:143 timed out in state=2 (after 30 secs, local=xxxxx:58478): user=<[email protected]>, method=CRAM-MD5, rip=xxxx, lip=xxxxx, TLS, session=<pTl0UTlAV8VWNF5+>

on the server:

imap([email protected]): Warning: Locking transaction log file /mnt/nfs/xxxx.dk/xxxxx/indexes/.INBOX/dovecot.index.log took 32 seconds (appending)

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