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<p>Hi, I hope someone can help me with this.</p>
<p><span><u>Problem<br /></u>Dovecot writes to <em>/var/lib/dovecot/instances</em> 1 up to 3 times a day, causing the system to wake up and disks to spin up.</span></p>
<p><span style="text-decoration: underline;">Details</span><br />content of /var/lib/dovecot/instances :<br /><span style="color: #ff0000;">1549073010</span> dovecot /var/run/dovecot /etc/dovecot/dovecot.conf<br />--> only the <span style="color: #ff0000;">timestamp</span> is changed (to current time) when dovecot writes to this file<br />--> during write the file is temporary renamed to <em>instances.lock</em></p>
<p>dovecot running processes:<br />dovecot (main process) --> it's this process that writes to /var/lib/instances<br />dovecot/anvil<br />dovecot/log<br />dovecot/config --> sometimes this process is not running, but doesn't change anything<br /><br />note:<br />no clients connected<br />problem also occur in the middle of the night (no human activity, client devices powered off, all external traffic blocked)<br />the writings occur around every 8 hours, but vary, sometimes it's 6 hours up to 13 hours.</p>
<p><span><u>Configuration<br /></u>See attachment:<br />doveconfig-short-[platform].txt (output of <em>"/usr/sbin/dovecot -n"</em>)<br />doveconfig-long-[platform].txt (output of <em>"/usr/bin/doveconf"</em>)</span><span><u><br /></u>--> <em>3-docker</em> config is the most simple setup of the 3<u><br /><br />Environment<br /></u></span>Tested on 3 platforms<br />Platform 1:<br />Intel Atom C2538 (Synology DiskStation 415+)<br />Linux version 3.10.105<br />Dovecot version 2.2.19 (Synology MailPlus Server)</p>
<p>Platform 2:<br />ARMv7 rev 1 (Synology DiskStation 215j)<br />Linux version 3.2.40<br />Dovecot version 2.2.19 (Synology Mail Server)</p>
<p>Platform 3:<br /><span style="display: inline !important; float: none; background-color: transparent; color: #000000; font-family: Verdana,Geneva,sans-serif; font-size: 13.33px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;">Intel Atom C2538</span> (Docker container)<br /><span style="display: inline !important; float: none; background-color: transparent; color: #000000; font-family: Verdana,Geneva,sans-serif; font-size: 13.33px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;">Linux version 3.10.105</span><br />Dovecot version 2.3.2.1 (0719df592)</p>
<p><br />How can dovecot be run without writing to /var/lib/dovecot/instances everyday? Is there a configuration setting for this?</p>
<p>Thanks already!<br />Tijl</p>
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