<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">On 15 Jul 2019, at 23.17, Ralf Hildebrandt via dovecot <<a href="mailto:dovecot@dovecot.org" class="">dovecot@dovecot.org</a>> wrote:<br class=""><div><blockquote type="cite" class=""><br class="Apple-interchange-newline"><div class=""><div class="">* Ralf Hildebrandt via dovecot <<a href="mailto:dovecot@dovecot.org" class="">dovecot@dovecot.org</a>>:<br class=""><blockquote type="cite" class="">We're using dovecot (via LMTP) as a backup for all incoming mail.<br class=""><br class="">I upgraded from 2.3.6 to 2.3.7 on the 12th:<br class="">2019-07-12 14:35:44 upgrade dovecot-imapd:amd64 2:2.3.6-2~bionic 2:2.3.7-8~bionic<br class=""><br class="">and it seems that 2.3.7 is slower than 2.3.6 -- mail to the backup<br class="">IMAP box is suddenly taking quite some time to get delivered and is piling up<br class="">in the queue.<br class=""></blockquote><br class="">And alas, I had a look at the monitoring and found that disk IO has<br class="">increase A LOT after the update: <a href="https://www.arschkrebs.de/images/dovecot-disk-io-increase.png" class="">https://www.arschkrebs.de/images/dovecot-disk-io-increase.png</a><br class=""><br class="">I zoomed in and found that the sudden increace in IO coincides with<br class="">the update to 2.3.7 (14:35): <a href="https://www.arschkrebs.de/images/dovecot-io-2.png" class="">https://www.arschkrebs.de/images/dovecot-io-2.png</a><br class=""></div></div></blockquote></div><br class=""><div class="">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?</div><div class=""><br class=""></div></body></html>