It is an umbrella ticket for tracing the progress of this improvement.
This is the second ingredient to solve the “checkpoints under backpressure” problem (together with unaligned checkpoints). It consists of two steps:
- See if we can use less network memory in general for streaming jobs (with potentially different distribution of floating buffers in the input side)
- Under backpressure, reduce network memory to have less in-flight data (needs specification of algorithm and experiments)