Il 22/07/19 18:49, Timo Sirainen ha scritto:
On 22 Jul 2019, at 17.45, Alessio Cecchi <alessio@skye.it <mailto:alessio@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.
Just for info,
I have upgraded all directors ring to Dovecot 2.3 but maintaining CentOS 6 and the load average is the same, so the increase of load during the first upgrade was caused by CentOS 7, not by Dovecot 2.3.
Ciao
-- Alessio Cecchi Postmaster @ http://www.qboxmail.it https://www.linkedin.com/in/alessice