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RADARGood tools open new possibilities.Explore thoughtfully. Create freely.

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A little signal. Less noise.

DISCOVER

Catalog Categories

CATEGORIES

Categories will appear when the source is connected.

More possibility. Less searching.

A considered collection of AI tools, trials, and opportunities.

RADAR / PostgreSQLStorage available

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A little signal. Less noise.

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Sharding-JDBC 分库分表实战:从 800 万订单表的查询优化说起

掘金

About this offer

当订单表扛不住了在电商平台的订单中心,单表数据量突破 800 万行后,查询开始明显变慢。订单查询接口 P99 从 200ms 涨到了 1200ms,EXPLAIN 一跑,典型的全表扫描。

Offer details

Provider: 掘金
Source: juejin-rss
Score: 57.39
Confidence: 54%

Source evidence

What RADAR observed and classified to build this opportunity. It is what the source published, not a verification that the offer is still active.

JuejinObserved: Sep 29, 2026Source reliability: 60%
Sharding-JDBC 分库分表实战:从 800 万订单表的查询优化说起. 当订单表扛不住了在电商平台的订单中心,单表数据量突破 800 万行后,查询开始明显变慢。订单查询接口 P99 从 200ms 涨到了 1200ms,EXPLAIN 一跑,典型的全表扫描。
Open source

Sharding-JDBC 分库分表实战:从 800 万订单表的查询优化说起

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The catalog shows persisted RADAR opportunities. Storage availability does not mean sources are verified or offers are active.