网站介绍:文章浏览阅读1.1k次。spark.shuffle.file.buffer 默认值是32kmap side task的内存buffer大小,写数据到磁盘文件之前,会先保存在缓冲中,如果内存充足,可以适当加大,从而减少map side磁盘IO次数,提升性能spark.reducer.maxSizeInFlight 默认值是48mreduce task的buffer缓冲,代表了每个reduce task每次能够拉..._spark.unsafe.sorter.spill.read.ahead.enabled
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