This is O/T apart from the fact that the server is Centos running Apache / Postgresql. I want to develop a real time (ish) dashboard type web page showring extracts of the contents of a table. I would like any changes that occur to be pushed to the web clients rather than have the clients poll the database. Based on the fact that I have not managed to come up with a successful Google search phrase I think this may not be possible, but just in case I thought I'd ask here. If it's not possible, can anyone suggest the most efficient / responsive polling techniques?