[GENERAL] How to get total count of queries hitting DB per day or per hour?

[Sheena, Prabhjot]

Guys
              Is there a way to get total count of queries hitting Postgresql 
DB(verison 9.3) per day or per hour ? I cannot turn on log_statement=all coz 
that's too much logging for our log file to handle. Is there another way to do 
that.


Thanks
Prabhjot