Re: IMAP login-logout cycle performance with performance mode seems slow/limited and cause cannot be found

For further testing and because I could not figure the limitation, I just duplicated the dovecot nodes multiple times and loadbalanced over them with primitive roundrobin TCP.

With every increase of instances I could load the system more and got almost linear scaling until about 16 instances were reached and the system is 85-95% loaded. It yields 3100-3500 cycles per second.

Which still poses the question: What could be the reason?