Enable monitoring on the health of postgres db

Dear all,

I am intending to use JMX to enable my application to be monitored by
the NMS. I am wondering is there any SNMP agent already build-up for
postgres DB and can be plugged into the JMX environment ?

I have found that a project for implementing a postgres db SNMP agent
(http://pgfoundry.org/projects/pgsnmpd/) ; however the version is
still in beta and it is not a java-based agent which is written in C
language.

Thanks
Neo