[Dovecot] Dovecot pop3 segfault problems

[Ken A]

On 9/24/2010 5:27 AM, enid vx wrote:
>>
>> and now, can you respond to Timos request for a backtrace:
>>
>> On 2010-09-21 10:16 AM, Timo Sirainen<tss at iki.fi>  wrote:
>>> Are these coming only from pop3 processes? Are you running imap? It's
>>> anyway difficult to say anything about segfaults without a gdb
>>> backtrace. See http://dovecot.org/bugreport.html how to get one.
>>
>> --
>>
>>
> Hi all,
>
> after the update I noticed that the error messages didn't go away for a
> little time. Also seeing the high load and high kernel cpu usage I did some
> changes to the /etc/fstab (adding noatime,nodiratime) to /var /home
> partitions.
> Also the dovecot -n now is like this:
> auth_mechanisms = plain login
> default_login_user = dovecot
> disable_plaintext_auth = no
> dotlock_use_excl = yes
> mail_access_groups = mail
> mail_fsync = never
> mail_location = mbox:~/.:INBOX=/var/mail/%u
> mmap_disable = yes
> passdb {
>    driver = pam
> }
> ssl_cert =</etc/ssl/certs/dovecot.pem
> ssl_key =</etc/ssl/private/dovecot.pem
> userdb {
>    driver = passwd
> }
>
>
> I see that for about 2-3 days now the error has gone away, and dovecot is
> running ok,
> but the high load is continually present, and I suspect of disk I/O latency.

You might try running 'vmstat 2', 'iostat -x', etc..
It sounds to me like a disk i/o problem, but we are just guessing unless 
we know more about the hardware and utilization.
A simple fix might be to add a fast local drive and move /var/mail to 
it's own spindle, assuming you don't have this configuration already.

Ken

>
> Again thank you for your support.
> Enid
>

-- 
Ken Anderson
Pacific Internet - http://www.pacific.net