Prasanth Jayachandran created HIVE-17304:
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Summary: ThreadMXBean based memory allocation monitory for hash
table loader
Key: HIVE-17304
URL: https://issues.apache.org/jira/browse/HIVE-17304
Project: Hive
Issue Type: Bug
Affects Versions: 3.0.0
Reporter: Prasanth Jayachandran
Assignee: Prasanth Jayachandran
Hash table memory monitoring is based on java data model which can be
unreliable because of various reasons (wrong object size estimation, adding new
variables to any class without accounting its size for memory monitoring,
etc.). We can use allocation size per thread that is provided by ThreadMXBean
and fallback to DataModel in case if JDK doesn't support thread based
allocations.
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