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Comment: add hive.async.log.enabled for HIVE-13027

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Whether enable loading UDFs from metastore on demand; this is mostly relevant for HS2 and was the default behavior before Hive 1.2.

hive.async.log.enabled

  • Default Value: true

  • Added In: Hive 2.1.0 with HIVE-13027

Whether to enable Log4j2's asynchronous logging. Asynchronous logging can give significant performance improvement as logging will be handled in a separate thread that uses the LMAX disruptor queue for buffering log messages. Refer to https://logging.apache.org/log4j/2.x/manual/async.html for benefits and drawbacks.

hive.msck.repair.batch.size

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