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Snailclimb merged 1 commit into from
May 8, 2019
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update Redis.md #305

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6 changes: 6 additions & 0 deletions docs/database/Redis/Redis.md
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Expand Up @@ -164,6 +164,12 @@ redis 配置文件 redis.conf 中有相关注释，我这里就不贴了，大
5. **allkeys-random**：从数据集（server.db[i].dict）中任意选择数据淘汰
6. **no-eviction**：禁止驱逐数据，也就是说当内存不足以容纳新写入数据时，新写入操作会报错。这个应该没人使用吧！

4.0版本后增加以下两种：

7. **volatile-lfu**：从已设置过期时间的数据集(server.db[i].expires)中挑选最不经常使用的数据淘汰
8. **allkeys-lfu**：当内存不足以容纳新写入数据时，在键空间中，移除最不经常使用的key



**备注： 关于 redis 设置过期时间以及内存淘汰机制，我这里只是简单的总结一下，后面会专门写一篇文章来总结！**

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