林木88

1. 负载均衡策略 无状态 半状态 全状态 2. 关键点： 公平性 正确性 （请求调度到能正确处理它的后端实例上） 3. 负载均衡策略： 3.1 无状态 轮训 （请求的工作负载和实例的处理能力差异都较

Abstract Physical properties are an essential part of the optimization process that allows you to ex

Calcite 的优化器主要有两个：HepPlanner 和 VolcanoPlanner。 HepPlanner 是一个启发式的优化器，基于非常简单的思想：即遍历匹配 RelOptRule 和 Re

Query optimization is an expensive process that needs to explore multiple alternative ways to execut

一、数仓是什么 根据维基百科的定义，数仓是用于报告和数据分析的系统，是来自一个或多个不同源的集成数据的中央存储库，它将当前和历史数据存储在一起。 数仓具备以下几大特性： 主题导向：通常需要按业务含义归

In the previous blog post, we looked into how the Adaptive Query Execution (AQE) framework is implem

Cost-based optimisation (CBO) is not a new thing. It has been widely used in the RDBMS world for man

I was planning to write about the Adaptive Query Execution (AQE) in this and next few blog posts, an

In this blog post, I will explain the Dynamic Partition Pruning (DPP), which is a performance optimi