We're using dovecot (via LMTP) as a backup for all incoming mail.
I upgraded from 2.3.6 to 2.3.7 on the 12th:
2019-07-12 14:35:44 upgrade dovecot-imapd:amd64 2:2.3.6-2~bionic
2:2.3.7-8~bionic
and it seems that 2.3.7 is slower than 2.3.6 -- mail to the backup
IMAP box is suddenly taking quite some time to get delivered and is piling up
in the queue.
doveconf -n:
===========
default_vsz_limit = 2 G
lmtp_user_concurrency_limit = 10000
mail_attachment_dir = /home/copymail/attachments
mail_fsync = never
mail_location = mdbox:~/mdbox
mail_plugins = zlib fts
mdbox_rotate_size = 128 M
... namespaces ...
plugin {
fts_autoindex = yes
fts_languages = de,en
zlib_save = gz
zlib_save_level = 5
}
protocols = " imap lmtp"
userdb {
args = username_format=%u /etc/dovecot/passwd
driver = passwd-file
}
protocol lmtp {
mail_plugins = zlib fts
}
--
Ralf Hildebrandt
Gesch?ftsbereich IT | Abteilung Netzwerk
Charit? - Universit?tsmedizin Berlin
Campus Benjamin Franklin
Hindenburgdamm 30 | D-12203 Berlin
Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
ralf.hildebrandt at charite.de | https://www.charite.de
* Ralf Hildebrandt via dovecot <dovecot at dovecot.org>:> We're using dovecot (via LMTP) as a backup for all incoming mail. > > I upgraded from 2.3.6 to 2.3.7 on the 12th: > 2019-07-12 14:35:44 upgrade dovecot-imapd:amd64 2:2.3.6-2~bionic 2:2.3.7-8~bionic > > and it seems that 2.3.7 is slower than 2.3.6 -- mail to the backup > IMAP box is suddenly taking quite some time to get delivered and is piling up > in the queue.And alas, I had a look at the monitoring and found that disk IO has increase A LOT after the update: https://www.arschkrebs.de/images/dovecot-disk-io-increase.png I zoomed in and found that the sudden increace in IO coincides with the update to 2.3.7 (14:35): https://www.arschkrebs.de/images/dovecot-io-2.png -- Ralf Hildebrandt Gesch?ftsbereich IT | Abteilung Netzwerk Charit? - Universit?tsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebrandt at charite.de | https://www.charite.de
On 15 Jul 2019, at 23.17, Ralf Hildebrandt via dovecot <dovecot at dovecot.org> wrote:> > * Ralf Hildebrandt via dovecot <dovecot at dovecot.org>: >> We're using dovecot (via LMTP) as a backup for all incoming mail. >> >> I upgraded from 2.3.6 to 2.3.7 on the 12th: >> 2019-07-12 14:35:44 upgrade dovecot-imapd:amd64 2:2.3.6-2~bionic 2:2.3.7-8~bionic >> >> and it seems that 2.3.7 is slower than 2.3.6 -- mail to the backup >> IMAP box is suddenly taking quite some time to get delivered and is piling up >> in the queue. > > And alas, I had a look at the monitoring and found that disk IO has > increase A LOT after the update: https://www.arschkrebs.de/images/dovecot-disk-io-increase.png > > I zoomed in and found that the sudden increace in IO coincides with > the update to 2.3.7 (14:35): https://www.arschkrebs.de/images/dovecot-io-2.png <https://www.arschkrebs.de/images/dovecot-io-2.png>Do the different disks have different kinds of data? Like you seem to be using external attachments and fts? Also your doveconf -n doesn't show what fts backend you're using. Or is it just half-configured and not really used? -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://dovecot.org/pipermail/dovecot/attachments/20190716/f4f1f48e/attachment.html>