Reload events of scheduler each N minutes

Hello,
i neew to reload the page with calendar each N minutes.
I do this:

scheduler.clearAll();
scheduler.load(“events.jsp”, “json”);
var dp = new dataProcessor(“events.jsp”);
dp.init(scheduler);

And it refresh something.
But if I modify from MySql table events, anche change something,
it will not appears in refresh! Why?
There is a way to do it?
Thanks!
Alice