Java面试题怎么解决的相关内容

Java 最常见的面试题：什么是缓存穿透？怎么解决？

缓存穿透是指查询一个一定不存在的数据，由于缓存是不命中时需要从数据库查询，查不到数据则不写入缓存，这将导致这个不存在的数据每次请求都要到数据库去查询，进而给数据库带来压力。为了解决缓存穿透的问题，可以采取以下几种策略：增加校验措施：可以在缓存层和数据库层都添加一些校验措施，例如检查...

【java常见的面试题】什么是缓存雪崩 ? 怎么解决 ?

缓存雪崩/缓存失效指的是大量的缓存在同一时间失效，大量请求落到数据库导致数据库瞬间压力飙升。造成这种现象的原因是，key的过期时间都设置成一样了。解决方案是，key的过期时间引入随机因素

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【java常见的面试题】什么是缓存击穿 ? 怎么解决 ?

缓存击穿是指缓存中没有但数据库中有的数据（一般是缓存时间到期），这时由于并发用户特别多，同时读缓存没读到数据，又同时去数据库去取数据，引起数据库压力瞬间增大解决方案 : 热点数据提前预热设置热点数据永远不过期。加锁 , 限流

【java常见的面试题】什么是缓存穿透 ? 怎么解决 ?

缓存穿透是指查询一条数据库和缓存都没有的一条数据，就会一直查询数据库，对数据库的访问压力就会增大，缓存穿透的解决方案有以下2种解决方案：缓存空对象：代码维护较简单，但是效果不好。布隆过滤器：代码维护复杂，效果很好

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更新时间 2023-10-16 03:49:44

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