I am using this plugin and it seems that each 3-4 seconds there is a connection with the database. So i was wondering if you have a lot of people online on the forum ( lets say 100 persons are logged in); how about the server load? that means within 3 seconds, there are are 100 requests fired to the server.
I really have no idea if that is much or not for a server to handle that. Is it much? too much? My website is stored on a normal shared hoster.