spark3.0优化特性
时间: 2023-09-20 16:09:20 浏览: 42
Spark 3.0引入了一些优化特性来提升性能。其中一项优化是关于Reducer个数的优化,通过选择更优的join策略来提高连接查询性能。以前相同的五个分区任务可能需要使用五个Reducer来处理,但在Spark 3.0中,可以只用三个Reducer进行处理,从而避免了不必要的资源浪费情况。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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