Frame Relay - Broadcast Queue

I stumbled with this today doing INE WB Volume I, so googling I found:

The Cisco IOS creates a broadcast queue for interfaces running frame-relay. This queue performs 2 functions: it ensures routing traffic is dealt with as a priority but it also limits the bandwidth that can be consumed by such traffic.

When an interface has many DLCIs the overhead of replicating routing traffic can be significant.

The interface has the following default settings

size: 64 packets
byte-rate: 256000 bytes per second
packet-rate: 36 packets per second

To change the settings the following interface command can be used

frame-relay broadcast-queue {x} {y} {z}

Source 
Cisco Docs