Major Description
The current config "buffered.records.per.partition" controls how many records in maximum to bookkeep, and hence it is exceed we would pause fetching from this partition. However this config has two issues:
- It's a per-partition config, so the total memory consumed is dependent on the dynamic number of partitions assigned.
- Record size could vary from case to case.
And hence it's hard to bound the memory usage for this buffering. We should consider deprecating that config with a global, e.g. "input.buffer.max.bytes" which controls how much bytes in total is allowed to be buffered. This is doable since we buffer the raw records in <byte[], byte[]>.
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