数据库mysql性能差异的相关内容

阿里云文档 2025-07-17

RDS MySQL写入数据报错Error 1406: Data too long for column

Error 1406: Data too long for column问题描述在RDS MySQL数据库中写入数据时，出现如下报错：Error 1406: Data too long for column 'xxx'问题原因字段长度限制当表结构中定义的字段为字符类型（如CHAR或VARCHAR），...

阿里云文档 2025-07-11

MySQL系列的数据库实例作为源端或目标端

本文为您介绍数据传输服务DTS（Data Transmission Service）支持的以MySQL系列（MySQL、PolarDB for MySQL、Mariadb、OceanBase（MySQL）、PolarDB-X 2.0）数据库实例为源端或目标端的任务。

阿里云文档 2025-07-09

RDS多可用区部署实例SLA提升

RDS高可用系列和集群系列多可用区部署实例的服务等级协议SLA提升至99.995%~99.997%。

阿里云文档 2025-07-08

RDS MySQL使用gh-ost出现“Scan error on column index 0”报错的解决方法

问题描述在RDS MySQL中使用gh-ost做DDL无锁变更时，可能会出现类似报错：Scan error on column index 0, name "@@global.port": converting NULL to int is unsupported。在RDS MySQL中使用gh-o...

阿里云文档 2025-06-25

Spring应用RDS数据源账密运行时轮转

本文档介绍如何在Spring应用中实现RDS数据源账密的运行时轮转，通过集成KMS与Nacos，实现数据库凭据的加密托管、动态更新与无缝切换，保障应用在凭据变更过程中的安全与稳定。

问答 2025-02-18 来自：开发者社区

阿里云polardb数据库与MySQL相比在20万条数据时，查询出现140倍的性能差异

polardb 数据库单表数据35万，同表数据复制到mysql 版本，mysql 查询count（*）仅需0.696秒，polardb 却需要137.274秒操作系统如下内存cpu 都是一致的，32g ,4核，虚拟机有人知道是为什么嘛？是我设置不对，还是polardb 就是这么性能差？

问答 2023-09-05 来自：开发者社区

请教一下OceanBase数据库，ob mysql模式和oracle模式有性能差异吗？

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更新时间 2025-02-19 12:10:54

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