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Flink中在使用聚合函数 GroupBy、Distinct、KeyBy 等函数出现数据热点怎么办？

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Flink中在使用聚合函数 GroupBy 等函数时出现数据热点该怎样解决？

Flink SQL在使用Groupby时出现热点数据，如何处理？

【Flink】GROUP BY 数据出现热点、数据倾斜

问题描述当您发现作业处理的性能很差，提示了资源后性能有也没有明显提升时，可能是数据出现热点、数据倾斜的状况。

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更新时间 2023-05-22 15:01:04

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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

产品控制台

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