Custom position inserts

I would like to use this software's frontend and manually update the database via MySQL INSERTs. I was able to add in my first site using fake data, but when I try to update the position, the dot on the map doesn't move. The Report is the only way for me to see updated positions.

1. Do you have any tips for using custom MySQL INSERTS?
2. Do you know why my position is not being updated in real-time?
3. What is the database's polling interval?

Real-time data is not retrieved from the database. It comes directly from device communication back-end using long-polling.

For more details see async servlet implementation:

https://github.com/tananaev/traccar/blob/master/src/org/traccar/http/AsyncServlet.java