hive 很慢解决办法

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hive 很慢:

运行一下一下语句:

set mapred.child.java.opts=-Xmx1024m;
set mapreduce.map.java.opts=-Xmx1310m;
set yarn.app.mapreduce.am.command-opts=-Xmx2457m;
set mapreduce.reduce.java.opts=-Xmx2620m;

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