[Java][FlightRPC] Increase the default backpressure threshold in Java Arrow Flight servers #40745
Description
Describe the enhancement requested
grpc-java recently added a toggle for changing the buffering threshold before backpressure is triggered (grpc/grpc-java#5433).
The default is 32KB. For Arrow Flight loads, this should be set higher: 1-10MB. There FlightServer.Builder should also let users specify the threshold.
Documentation should recommend users not use complicated backpressure strategies after making this change.
Component(s)
FlightRPC, Java