[jira] [Reopened] (KAFKA-13152) Replace "buffered.records.per.partition" with "input.buffer.max.bytes"

["Matthias J. Sax (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-13152?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias J. Sax reopened KAFKA-13152:
-------------------------------------

> 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
>            Assignee: Sagar Rao
>            Priority: Major
>              Labels: needs-kip
>             Fix For: 3.3.0
>
>
> 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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