[Dovecot] speed up dovecot IMAP server

[Stan Hoeppner]

On 1/23/2013 2:59 AM, Bernics Gábor | Penta Unió Zrt. wrote:

> I use Roundcube and Thunderbird. 

Do both clients experience the 5-6 second delay?

> Memory usage: 1.2 Gbyte of 6 Gbyte (Can I increase cache memory size
> for Dovecot?) 

No, but you should change to:

mmap_disable=no

and add:

maildir_very_dirty_syncs=yes

which should help a bit.  You're already indexing with lmtp and using
sieve, so your indexes 'should' be current.

However, you said the delay is in opening individual messages, not
siimply listing them, which doesn't involve the indexes, but the message
files.  If this happens with Tbird but not RC it may be a duplex
mismatch or other network issue.  If it happens with both then there's
something else going on, maybe with Dovecot, maybe with Linux, maybe
with the disk or disk controller.

Do you have any errors in your Dovecot log files?  How about disk
related errors in dmesg?  Tbird activity manager?

You're not giving us enough information upon which to troubleshoot.

-- 
Stan