No buffer space available

I am using an application in Yii and postgres database. When i run the application on live server(not local system) i am getting this error

"CDbConnection failed to open the DB connection: SQLSTATE[08006] [7] could not connect to server: No buffer space available (0x00002747/10055) Is the server running on host "localhost" and accepting TCP/IP connections on port 5432?"

I have 5 active client database. The error not showing every time. How to solve this problem..?

This error message is thrown by PostgreSQL when a Winsock operation returns the error WSAENOBUFS.

Microsoft describes the error as:

No buffer space available.

An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.

It is a problem of the Windows operating system. I don't know a lot about Windows, but it sounds like a resource shortage.

Maybe there are too many open TCP connections?