Stephan Ewen created FLINK-19162:
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Summary: Allow Split Reader based sources to reuse record batches
Key: FLINK-19162
URL: https://issues.apache.org/jira/browse/FLINK-19162
Project: Flink
Issue Type: Sub-task
Components: Connectors / Common
Reporter: Stephan Ewen
Assignee: Stephan Ewen
Fix For: 1.12.0
The Split Readers hand over a batch of records at a time from the I/O thread
(fetching and decoding) to the main operator processing thread.
These structures can memory intensive and expensive and performance greatly
benefits from reusing them. This is especially true for high-performance format
readers like ORC and Parquet.
While previous sources (where I/O was in the main thread) could reuse objects
in a trivial manner, the new Split Reader API (with multiple threads) needs an
explicit {{recycle()}} hook to allow returning/reusing these objects.
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