[Dovecot] Dovecot Deliver CPU usage

[Timo Sirainen]

On Nov 28, 2009, at 3:21 AM, Aravind Divakaran wrote:

> We have upgraded the dovecot from 1.0 to 1.2.8. After
> upgradation we have noticed that dovecot deliver process is utilizing a lot
> of CPU. As a result the mailsystem will stop working. When we limit the no
> of procs in postfix for dovecot deliver the CPU usage will come down. But
> we are not facing this problem with the previous version. Below is the log
> files for dovecot when the error occurs

You mean a single deliver process can run a long time with 100% CPU? Getting a strace of the process could be helpful.

> write_full(/home/vmail/dhanbank.co.in/vinukumarvm/temp.server.be3e5a849a909847)
> failed: No space left on device
> dovecot: deliver(user at example.com):
> stat(/tmp/Dovecot Delivery Mail) failed: No space left on device 
> 
> But my
> system has 54gb of free space for root filesystem where tmp residing. Can
> anyone help me to solve this issue. 

The /tmp/ part is wrong, I should get that fixed probably. Is there space in /home/vmail? Or do you use filesystem quotas? (I see you're also using Maildir++ quotas.)