Script and tool to monitoring sessions

Hi,
I am new in Postgresql world and I always used oracle.
To monitoring sessions and check to tune database I always used, in Oracle,
Oracle Enterprise Manager.
What is a similar tool for Postgresql? I need a free tool.

Moreover in Oracle to check sessions I use some reports:
awr
addm
ash

do some similar reports exist in postgresql?


Regards,
Angelo



--
View this message in context: http://postgresql.nabble.com/Script-and-tool-to-monitoring-sessions-tp5867117.html
Sent from the PostgreSQL - novice mailing list archive at Nabble.com.