Dovecot Director upgrade from 2.2 to 2.3

[Alessio Cecchi]

Hi Timo,

here you can see two images with the load average and CPU usage with 
Dovecot 2.2 (Centos 6) and 2.3 (Centos 7) on the same hardware and same 
configuration:

https://imgur.com/a/1hsItlc

Load average increment is relevant but CPU usage is similar.

Il 22/07/19 18:49, Timo Sirainen ha scritto:

> On 22 Jul 2019, at 17.45, Alessio Cecchi <alessio at skye.it 
> <mailto:alessio at skye.it>> wrote:
>>
>> one server of the ring is now running Dovecot 2.3.7 and works fine 
>> with the others Dovecot 2.2 since 3 days.
>>
>> I notice only that the load avarage of this CentOS 7 server is higher 
>> compared with CentOS 6 and Dovecot 2.2, but I don't know if is 
>> related to the new operating system or Dovecot (hardware is the same).
>>
> How much higher? Can you check the individual dovecot processes' CPU 
> usage? I guess mainly director, imap-login and pop3-login. The 
> director code should be pretty much the same though.
>
> The SSL code in login processes changed in v2.3, so I wonder if the 
> new code has some performance issues.
>
-- 
Alessio Cecchi
Postmaster @ http://www.qboxmail.it
https://www.linkedin.com/in/alessice

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