[Dovecot] Sizing login_process_size and login_processes_count?

[Francisco Reyes]

Any suggestions on sizing login_process_size and login_processes_count for a 
server expected to be doing 100 to 200 simultaneous connections?

Is there a way to separate login_processes_count between imap and pop? I 
would like to have at least 50 imap processes ready, but we rarely have any 
more than 5 to 10 pop connections. Would be a shame to have 40+ pop 
login processes doing nothing most of the time.  

For now did login_process_size = 96, but with an average of 100 to 200 and 
some rare ocassion of 300+ connections I am wondering what is a reasonable 
number for login_process_size.