Hello, i have successed in creating multi tenency in a single server on centos. I created four to five instance with no issues, after this i created another instance and i struck with an error called "Fatel: too many clients already". This error is not leaving to create another database for new instance. For this i incresed max_connection in "postgressql.conf" and restarted the postgresql server. 

But i was unable to restart the server again and i refelected back the correction what i did in "postgressql.conf" file and try to start the postgresql server but failed to start.  

At last i reffered one document and http://forums.fedoraforum.org/showthread.php?t=121504 i deleted the postgresql server and re-installed again.

Now my all multiple-instance is working without database. 

My question is: How can i create a new database for all instance, which should not be conflict with each other instance and "Fatel: too many clients already" should be resolved. And i need to create as many database i want.

Thanks in advance.