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Subject: 回复：回复：RE: 回复：Re: sparksql running slow while joining_2_tables.
update status after i did some tests. I modified some other parameters, found 2
parameters maybe relative.
spark_worker_instance and spark.sql.shuffle.partitions
before Today I
update status after i did some tests. I modified some other parameters, found 2
parameters maybe relative.spark_worker_instance and spark.sql.shuffle.partitions
before Today I used default setting of spark_worker_instance and
spark.sql.shuffle.partitions whose value is 1 and 200.At that time , my
