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