Kevin Wilfong created HIVE-3706:
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Summary: getBoolVar in FileSinkOperator can be optimized
Key: HIVE-3706
URL: https://issues.apache.org/jira/browse/HIVE-3706
Project: Hive
Issue Type: Improvement
Components: Query Processor
Affects Versions: 0.10.0
Reporter: Kevin Wilfong
Assignee: Kevin Wilfong
There's a call to HiveConf.getBoolVar in FileSinkOperator's processOp method.
In benchmarks we found this call to be using ~2% of the CPU time on simple
queries, e.g. INSERT OVERWRITE TABLE t1 SELECT * FROM t2;
This boolean value, a flag to collect the RawDataSize stat, won't change during
the processing of a query, so we can determine it at initialization and store
that value, saving that CPU.
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