环境说明：flink 1.15 场景描述：left 表是一个来源于kafka的表且定义了水位线，right表是来自于mysql cdc的表，right表定义了主键和水位线，按flink官方说法right表就是一个版本表了。2个表按FOR SYSTEM_TIME AS OF事件时间的方式关联。且关联字段都是主键。在执行环境中设置了程序的并行度为3。问题描述：right表本身有不少数据了，当lef....

文章 2024-03-18 来自：开发者社区

在Flink中，你可以通过以下方法为join操作设置并行度

在Flink中，你可以通过以下方法为join操作设置并行度：使用ExecutionEnvironment的setParallelism方法。首先，你需要创建一个ExecutionEnvironment实例，然后调用setParallelism方法来设置并行度。例如： ExecutionEnvironment env =...

问答 2023-07-25 来自：开发者社区

Flink中FLINK-SQL，两个千万级的表join，并行度12，tm=4096m，慢得扣卡，？

Flink中FLINK-SQL，两个千万级的表join，并行度12，tm=4096m，慢得扣卡，有没大佬知道哪个环节出了问题？

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更新时间 2024-03-26 12:01:26

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实时计算Flink版

阿里云实时计算Flink版(Alibaba Cloud Realtime Compute)，完全兼容开源的Apache Flink，比开源性能提升2～3倍，提供了完整的告警、监控、日志的解决方案、提升开发效率且无运维成本，并有社区专家提供技术支持。

立即开通

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产品文档

实时同步

MySQL 到 Hologres

Kafka 到 Hologres

功能对比

开源Flink对比

成本优化

作业自动调优