I want to monitor the following

1.Monitor (ping) servers and send out alerts if they are not responding.

2.Monitor (HTTP)  ESB processes and Portal processes and send out email alerts if no response.

3 .Monitor database tablespace and send out alerts if free space on some of the tablespaces goes below certain limit.

i tried with standard parameters but it not fulfilling my  requirements.please me help out

How to create the custom parameter list ?
How to catch error in the esb logs and send out a  alert email ?

Server version :0.2.26
agent version :0.2.26

Thanks
Pasupuleti