THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Whether Hive should use a memory-optimized hash table for MapJoin. Only works on Tez and Spark, because memory-optimized hash table cannot be serialized. (Spark is supported starting from Hive 1.3.0, with HIVE-11180.)
hive.mapjoin.optimized.hashtable.wbsize
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