Update 缓存.md

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补一张时序图，说明先删除缓存再更新数据库时，读请求会把旧值写回缓存。

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CyC2018

2026-10-25 18:52:37 +08:00

parent c6c805e4f8

commit a541d18c71

3 changed files with 54 additions and 0 deletions

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notes/pics/cache-aside-race.png

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