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

[Voytek Eymont]

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