[SR-Users] Best place to change mem settings

Greetings, As far as i can tell, i have 3 ways to permanently change the memory settings in Kamailio : /etc/init.d/kamailio , /etc/default/kamailio and src/core/config.h. What's the priority between them? If i have different values in all 3 of them, which one will be used? Which is one is the best to use reliably? I recently upgraded my Kamailio from 5.0 to 5.2 and i need 12Mb of PKG. Before starting the new version for the first time i changed the values in /etc/default and the memory error didn't go away. It only worked after i changed it in core/config.h and recompilled. After that, i started Kamailio and i could do the changes in /etc/default without any problem. Does this happen for a reason? Best Regards, Duarte Rocha