1. Cascade框架SQL优化器新一代cascade框架的SQL优化器，面向全并行执行架构，代价优化CBO和规则优化RBO相结合，实现复杂SQL免调优。 cascade框架的SQL优化器具备以下功能： • Top-Down路径搜索框架，搜索和路径选择更全面精准，避免出现局部查询路径最优解；• 子查询自动改写为分布式JOIN，实现并行计算，规避手工改写调优；•....

文章 2023-05-22 来自：开发者社区

《阿里云认证的解析与实战-数据仓库ACP认证》——云原生数据仓库AnalyticDB PostgreSQL版解析与实践（下）——三、SQL性能调优（下）

更多精彩内容，欢迎观看：：《阿里云认证的解析与实战-数据仓库ACP认证》——云原生数据仓库AnalyticDB PostgreSQL版解析与实践（下）——三、SQL性能调优（下）：6. 可视化执行计划如图是执行计划可视化展示。示例语句explain （format json,analyze true） select count(*) from test,tes....

问答 2022-04-15 来自：开发者社区

阿里云数据库优化SQL调优

性能优化/故障排除/长期代维找云库管 www.yundba.com ORACLE\SQL调优\阿里云《阿里云ORACLE优化》，文章中最后一部分未展开，先用我多年前写的一篇文章来补充吧下面的文章原本不是测试的主题，但为给后面的兄弟们节省点时间，我还是忍不住的记录了一下了！解答阿里云oracle用户的顾虑 ...

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