[SR-Users] when does ds_select_dst update list of addresses to choose from when using DB?

I'm using dispatcher module for load balancnig purposes I read active/inactive nodes from the database

So I define on my kamailio.cfg: modparam("dispatcher", "db_url", "mysql://openser:openserrw@ <DB_IP>/openser")

Then, on my route(DISPATCH) I call:

* ds_select_dst("1", "4");* * t_relay();* * *

My question is: Which *set of addresses is using **ds_select_dst *to choose destination. Will it do a query on the db each time updating active and inactive nodes on each ds_select_dst call? If not, when is the list of addresses to choose updated? (on kamaiilio restart, periodically...) I say this because I would like to update active and inactive nodes from a 3rd party application modifying the flags column but I need to know also how many time will it take for the change to be applied.

BR Albert