[Dovecot] imap-login process_limit (100) reached, client connections are being dropped

noticed this in the log today, after about 11 warning IMAP appears to have not worked, 'service dovecot reload' got it going again

question: what to check/alter ?

# grep process_limit /var/log/maillog Aug 13 15:31:44 geko dovecot: master: Warning: service(imap-login): process_limit (100) reached, client connections are being dropped ''' Aug 13 20:45:35 geko dovecot: master: Warning: service(imap-login): process_limit (100) reached, client connections are being dropped

# doveconf -n | grep limit # # dovecot --version 2.1.1 # ps ax | grep imap | wc 109 546 4693 # ps ax | grep imap-login | wc 57 286 2619 # doveadm who | wc

 16     122    1531

centos 6, 20 virtual domains, 100 users

-- Voytek Eymont