KIP-81 — Bound Fetch memory usage in the consumer

Accepted Consumer

Adds a `max.bytes` consumer fetch configuration that caps the total bytes returned across all partitions in a single `FetchResponse`, independent of per-partition limits. Without a global cap, a consumer subscribed to many partitions would issue parallel fetches to all brokers owning those partitions, making total memory usage unbounded relative to the number of partitions.

Protocol Impact

Fetch

Details