Which setting defines the maximum data returned for each fetch request (covers multiple partitions)?

Which setting defines the maximum data returned for each fetch request (covers multiple partitions)?

• A. max.poll.records
• B. max.partition.fetch.bytes
• C. fetch.max.bytes
• D. fetch.min.bytes

Answer: (C)

When a consumer fetches data, the amount of data returned in a single fetch response is governed by a limit on the total bytes across all partitions included in that response. This means you control the overall size of the batch the broker sends back in one fetch, no matter how many partitions contribute data. The setting that defines this total maximum is fetch.max.bytes. It ensures the entire fetch response doesn’t exceed a specified byte size, which helps manage network usage and backpressure. In contrast, max.partition.fetch.bytes is a per-partition limit, so each partition can contribute up to that many bytes, but the total across all partitions can still be larger than any single per-partition limit if there are multiple partitions. fetch.min.bytes, on the other hand, is about waiting to accumulate a minimum amount of data before sending a response and does not set an upper bound. max.poll.records determines how many records are returned in a poll, which is a count-based control rather than a size-based one.

When a consumer fetches data, the amount of data returned in a single fetch response is governed by a limit on the total bytes across all partitions included in that response. This means you control the overall size of the batch the broker sends back in one fetch, no matter how many partitions contribute data. The setting that defines this total maximum is fetch.max.bytes. It ensures the entire fetch response doesn’t exceed a specified byte size, which helps manage network usage and backpressure.

In contrast, max.partition.fetch.bytes is a per-partition limit, so each partition can contribute up to that many bytes, but the total across all partitions can still be larger than any single per-partition limit if there are multiple partitions. fetch.min.bytes, on the other hand, is about waiting to accumulate a minimum amount of data before sending a response and does not set an upper bound. max.poll.records determines how many records are returned in a poll, which is a count-based control rather than a size-based one.