-am monitoring the postgresql9.2.4 using monit in my virtual private server. Am always getting following log 2013-08-21 06:02:33 UTC LOG: incomplete startup packet 2013-08-21 06:04:33 UTC LOG: incomplete startup packet 2013-08-21 06:06:33 UTC LOG: incomplete startup packet
Looks like this is happening at each 2 minutes, so it is probably some monitoring tool (like Nagios, Cacti, Zabbix, etc.) is opening a socket to PostgreSQL's port only to check if it is responding, and them disconnecting. Check if you have this kind of service on your environment.
You would have the same effect with nc:
$ nc -zv <host> 5432
As what you can do, if that is the case, just ignore this message, it should cause no harm.
Regards,
-- Matheus de Oliveira Analista de Banco de Dados Dextra Sistemas - MPS.Br nível F! www.dextra.com.br/postgres