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<p>Hello.</p>
<p>Dovecot version: 2.2.36<br>
OS: CentOS Linux release 7.9.2009 (Core)<br>
Kernel: 3.10.0-1160.11.1.el7.x86_64</p>
<p>I have two dovecot servers in replication master/master.
Sometimes happens that deliver or imap process hangs and causing
high CPU usage.<br>
In log's I only see locking failures but not initial cause why
this happened.<br>
For mail storage I use ZFS pool with compression enabled.</p>
<p>I made some digging and find this option: mmap_disable = yes. I
will try this setting today evening.<br>
</p>
<p>But I wondering if you have any idea why this happening and how
to start solving this problems? Is there any additional setting
like mmap_disable that can help solved this issues?<br>
</p>
<div class="moz-signature">-- <br>
<div style="font-family:Calibri,
Arial;font-size:11pt;color:black;">BR<br>
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