[Dovecot] auth service: out of memory

Hi,

I have some out of memory errors in my logs (file errors.txt attached)

I'm using dovecot 2.0.19, I can see some memory leaks fix in hg after the 2.0.19 release but they seem related to imap-login service,

I attached my config too, is something wrong there? Should I really increase the limit based on my settings?

Can these commits fix the reported leak?

http://hg.dovecot.org/dovecot-2.0/rev/6299dfb73732 http://hg.dovecot.org/dovecot-2.0/rev/67f1cef07427

Please note that the auth service is restarted when it reach the limit so no real issues,

please advice

thanks Nicola