Need help in PGSQL

[sbaskar <sbaskar(at)adventnet(dot)com>]

Hi,
I am doing a project in Database Monitoring tool. I am planning to add 
pgsql also. So i need the table details, where i can get details like  
Request Rate, Bytes Received Rate, Bytes Send Rate, Open Connections, 
Aborted Connections, Aborted Clients, Threads Used, Threads in Cache, 
Thread Cache Size, Database Details, Immediate Locks, Locks Wait, Key 
Hitrate, Key Buffer Used, Key Buffer Size, Key Buffer Size, Key Buffer 
Size, Key Buffer Size, Total Memory, SQL Cache Memory, Lock Memory, 
Buffer Hit Ratio, Active Connections, Logins/Min, Cache Used/Min, Latch 
Details, Agents Statistics , Transaction Statistics,.
Also i am not able to connect to the database through JDBC. It says 
some error like Permission denied. What i need to do to get rid of this.

Any help on this would be greatly appreciated. Looking for positive and 
quick response from you.

Thanks in Advance,
Baskar.S