Riza Suminto created IMPALA-11099:
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Summary: Use orc::Reader::getMemoryUseByTypeId to compute ideal
memory reservation
Key: IMPALA-11099
URL: https://issues.apache.org/jira/browse/IMPALA-11099
Project: IMPALA
Issue Type: Improvement
Components: Backend
Reporter: Riza Suminto
The design of IMPALA-6636 currently follow existing algorithm in
hdfs-parquet-scanner for computing ideal memory reservation for each column
(see ).
We can refine this computation for ORC by checking
orc::Reader::getMemoryUseByTypeId once the file reader has read the metadata in
footer.
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