SQM CABLE DOCSIS 3.1 Settings + Packet Prioritization

That really depends on the number of users in your segment and how many are active concurrently. Almost all access networks offer more aggregate enduser-capacity than the network can deliver (under worst case all are active at the same time assumptions), but the actual situation is rare.

However if this happens often in your network, have a look at https://forum.openwrt.org/t/cake-w-adaptive-bandwidth/108848 how to adaptively adjust the cake shaper settings.