Guozhang Wang created KAFKA-13152:
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Summary: Replace "buffered.records.per.partition" with
"input.buffer.max.bytes"
Key: KAFKA-13152
URL: https://issues.apache.org/jira/browse/KAFKA-13152
Project: Kafka
Issue Type: Improvement
Components: streams
Reporter: Guozhang Wang
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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