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“爆到天际线” - TiDB 2021 Hackathon 决赛不负责任点评
作者介绍：唐刘，PingCAP VP of Engineering，TiDB Hackathon 2021 特邀评委。

TiDB 2021 Hackathon 终于落下帷幕，最开始我还担心，今年 Hackathon 还有啥东西能出来，结果却大大超出我的预期，很多项目真的能用惊艳来形容，大家都在自嘲，说『内卷得太厉害』。作为评委，全程参与了预赛内核组以及决赛的答辩，还是有很多感触的，之前已经写了一篇预赛的点评（点击文末 “阅读原文” 即可查看），这次也对决赛做一次不负责任的点评。

决赛这次有 20 个项目，我大概分几个维度做一个统一介绍。

性能/功能增强

这次在 TiDB 内核上，做的不少性能提升功能真的很惊艳，因为我预赛点评的主要是内核组的东西，所以在这里简单进行一下汇总。

增量 Analytic Table

这个功能通过 Region Cache 统计信息的方式来加速全表的 analyze，在表越大的情况下，收益会越加明显。一方面加速了 analyze 的速度，另外一方面也能缓解 analyze 造成的大量 IO 和 CPU 开销，降低了系统的压力。不过这个实现有一个前提假设，就 … ⌘ Read more

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