Re: [Dovecot] load increase after upgrade to 2.0.8

[Timo Sirainen]

> service imap-login {
>   service_count = 1
> }

So you have tons of imap-login processes. Did you have that in v1.2 too? Try 
setting service_count=0 (and same for pop3-login)

http://wiki2.dovecot.org/LoginProcess