[Dovecot] Login processes in Dovecot

[Bruce Bodger]

On Jun 8, 2009, at 4:17 PM, Scott Haneda wrote:

> Thanks, I have been looking at those adjustments.  My concern, is  
> that if Dovecot uses a process per imap or pop connection, 2048 is  
> not nearly enough for any significant email system.

There are several parameters in dovecot.conf that can be adjusted to  
prevent the problem that you're concerned about...

# Should each login be processed in it's own process (yes), or should  
one
# login process be allowed to process multiple connections (no)? Yes  
is more
# secure, espcially with SSL/TLS enabled. No is faster since there's  
no need
# to create processes all the time.
login_process_per_connection = no

# Maximum number of login processes to create. The listening process  
count
# usually stays at login_processes_count, but when multiple users  
start logging
# in at the same time more extra processes are created. To prevent  
fork-bombing
# we check only once in a second if new processes should be created -  
if all
# of them are used at the time, we double their amount until the  
limit set by
# this setting is reached.
login_max_processes_count = 128

[..]

Search dovecot-example.conf for 'process'

B. Bodger