实时计算 Flink版cdc优化的相关内容

问答 2023-07-26 来自：开发者社区

Flink CDC中一张流表去关联多张维表的这效率太差，几分钟才跑了几千条，这怎么优化呀？

"问题1：Flink CDC中一张流表去关联多张维表的这效率太差，几分钟才跑了几千条，这怎么优化呀？其实我一张流表关联六张维表，而且数据都是一对一的，设置缓存也没用，全当流表效率很高，但是内存不够。当维表效率太差了。每张表都是一千万数据。我本来都是流表，只是流表join会全部加载到内存里，内存不够用。所以就改成流表关联维表。七张表各有一千万数据，都是一对一关联的，从MySQL库同步到starro....

问答 2023-07-26 来自：开发者社区

Flink CDC中这种情况请问该如何优化？

问题1：Flink CDC中我这边规则维表有3万多记录，业务数据kafka 读取，lookup join 该规则维表，但关联字段不是规则维表的主键，关联后可能会输出多条记录现在偶尔出现 TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer 的报错请问该如何优化？规则维表用jdbc 读取，设置了参数lookup....

问答 2023-07-26 来自：开发者社区

Flink CDC中请问如果lookup join 提示超时，锁问题，一般如何优化？

Flink CDC中请问如果lookup join 提示超时，锁问题，一般如何优化？调整参数？lookup.cache.max-rowslookup.cache.ttl

问答 2023-07-24 来自：开发者社区

Flink CDC差不多1s同步一条数据，效率很低，有没有优化方案？走的内网。

"问题1：Flink CDC差不多1s同步一条数据，效率很低，有没有优化方案？走的内网。我就是dinky上弄的。连接器版本checkpoint配的3000s问题2：这都20分钟了，是不是有点慢了，还没有数据写进去，写到KAfka。"

问答 2023-07-02 来自：开发者社区

请问下 flink cdc 全量初始化mysql表时，主键是字符串类型同步很慢，这个需要咋优化配置？

请问下 flink cdc 全量初始化mysql表时，主键是字符串类型同步很慢，这个需要咋优化配置参数？目前我设置了 chunk size 4k-10w之间变化不明显，速度很慢1-2K/s，如果主键时bigiint 没啥问题？

问答 2023-06-29 来自：开发者社区

Flink CDC中大佬你测过初始化时候的同步速度吗？我现在407w数据要同步14分钟，有优化办法吗

问答 2023-06-18 来自：开发者社区

Flink CDC这个版本oracle有优化吗？好慢啊，看了issue 感觉Oracle问题不少，

Flink CDC这个版本oracle有优化吗？好慢啊，看了issue 感觉Oracle问题不少，这个已经在优化了吗

问答 2023-06-18 来自：开发者社区

有人用多表Flink CDC中left join吗？90多个g感觉都够呛，有好的优化方案啥的吗？

问答 2023-06-18 来自：开发者社区

有没有朋友做过Flink CDC目标端为mpp 列存数据库dml入库性能的优化？

问答 2023-06-18 来自：开发者社区

Flink CDC es每天做的segment很大，有什么办法优化吗？

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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