Change advertisement interval - BLE mesh


I'm new to BLE mesh SDK and I'm trying to explore available feature.

I'm referring to Generic on/off application and I would like to increase/ change the advertisement interval.

I tried by changing "BEARER_ADV_INT_DEFAULT_MS" macro but it dint change in the power consumption.

While going through doc I found one more "MESH_ADV_INTERVAL_DEFAULT" and I dint understand why this 2 are used.

Can you please suggest a user manual to understand completely this MESH SDK.

I see so many other packet interval related marcro like "NRF_MESH_PROV_BEARER_ADV_UNPROV_BEACON_INTERVAL_MSm, MESH_ADV_INTERVAL_DEFAULT" what about these 2?