一、性能诊断与优化数据库自治服务（Database Autonomy Service，简称DAS）是一种基于机器学习和专家经验，以实现数据库自感知、自修复、自优化、自运维和自安全的云服务。DAS能够帮助用户消除数据库管理的复杂性及人工操作引发的服务故障，有效保障数据库服务的稳定、安全及高效。目前，该服务已在阿里巴巴集团上线超3年，自动优化了超4200万条SQ....

文章 2023-05-23 来自：开发者社区

企业运维训练营之数据库原理与实践—数据库DAS简介和备份上云方案—性能诊断与优化（下）

接上篇：空间碎片自动回收是DAS进行空间优化的一种方式，实例会自动执行优化命令回收空间碎片，帮助用户实现整理物理碎片的功能。在空间优化前，DAS需要完成三大类基本检查：第一类，当检测到以下一项或多项没有通过时，就不再对表空间进行回收。其一，剩余可用空间需要达到所需回收表物理空间的3倍；其二，表上不存在浮点型索引。第二类，当检测到其中一项没有通过时，需要等待1到....

问答 2023-01-09 来自：开发者社区

数据库自治服务DAS性能洞察如何计费

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更新时间 2024-10-17 18:23:39

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数据库自治服务 DAS

数据库自治服务（Database Autonomy Service，简称DAS）是一种数据库自感知、自修复、自优化、自运维及自安全的云服务，帮助用户消除数据库管理复杂性及人工引发故障，有效保障数据库的稳定、安全及高效。

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在线咨询

RDS MySQL 迁移至 PolarDB MySQL 版

通过本方案，RDS MySQL 的数据可在线实时同步到 PolarDB MySQL 版，并且升级切换后的 PolarDB 集群包含源 RDS 实例的账号信息、数据库、IP 白名单和必要的参数。这样可实现不修改应用代码的情况下，将 RDS MySQL 数据库迁移升级至 PolarDB MySQL 版。

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