实时计算 Flink版hashmap 的相关内容

问答 2024-04-22 来自：开发者社区

Flink暴露一个问题，使用这种方式加数据，不能指定hashMap大小，怎么办？

Flink暴露一个问题，使用这种方式加数据，不能指定hashMap大小？然后这个row又是内置的，我们要动态加入 500个字段，然后导致性能急剧下降，hashmap在不停地扩容原先能跑5万每秒，然后使用这个只能1000每秒，使用反射的话，也达不到5万，能达到2-3万多

问答 2024-02-25 来自：开发者社区

Flink CDC里任务重启由rocksdb状态后端改为hashmap行不行呢？

问答 2023-04-26 来自：开发者社区

flink任务里面能用本地缓存吗（比如把数据存在HashMap里）？我把分库分表的表关系（如user

flink任务里面能用本地缓存吗（比如把数据存在HashMap里）？我把分库分表的表关系（如user0~user1000写到user表）缓存在HashMap里，把任务提交到集群环境后，HashMap打印出来发现是空的；在本地运行时是有值的

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更新时间 2025-05-07 16:01:43

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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