HarkLee

摘要： 官网是这么说的：The first way to reduce memory consumption is to avoid the Java features that add overhead, such as pointer-based data structures and wrapper ... 阅读全文

摘要： 使用spark.streaming.receiver.maxRate这个属性限制每秒的最大吞吐。官方文档如下：Maximum rate (number of records per second) at which each receiver will receive data. Effective... 阅读全文