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### 头条号
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### 掘金
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### 知乎
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| # | 文章 | 抄袭者 | 备注 |
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如果系统访问量很高,Nginx 本地缓存过期失效了,redis 中的缓存也被 LRU 算法给清理掉了,那么会有较高的访问量,从缓存服务调用商品服务。但如果此时商品服务的接口发生故障,调用出现了延时,缓存服务全部的线程都被这个调用商品服务接口给耗尽了,每个线程去调用商品服务接口的时候,都会卡住很长时间,后面大量的请求过来都会卡在那儿,此时缓存服务没有足够的线程去调用其它一些服务的接口,从而导致整个大量的商品详情页无法正常显示。
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- 这其实就是一个商品接口服务故障导致缓存服务资源耗尽的现象。
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+ 这其实就是一个商品接口服务故障导致缓存服务资源耗尽的现象。
Original file line number Diff line number Diff line change @@ -14,7 +14,7 @@ Redis 是以速度快,性能好著称的,我们知道 Redis 一开始的容
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Redis 中字典的数据结构如下:
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- ``` tex
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+ ``` c
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// 字典对应的数据结构,有关hash表的结构可以参考redis源码,再次就不进行描述
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typedef struct dict {
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dictType *type; // 字典类型
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< script src ="//cdn.jsdelivr.net/npm/prismjs/components/prism-java.min.js "> </ script >
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< script src ="//cdn.jsdelivr.net/npm/prismjs/components/prism-python.min.js "> </ script >
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< script src ="//cdn.jsdelivr.net/npm/docsify-copy-code@2.1.1/dist/docsify-copy-code.min.js "> </ script >
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- < script src ="//cdn.jsdelivr.net/npm/docsify/lib/plugins/search.js "> </ script >
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- < script src ="//cdn.jsdelivr.net/npm/docsify/lib/plugins/emoji.js "> </ script >
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- < script src ="//cdn.jsdelivr.net/npm/docsify/lib/plugins/zoom-image.js "> </ script >
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+ < script src ="//cdn.jsdelivr.net/npm/docsify/lib/plugins/search.min. js "> </ script >
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+ < script src ="//cdn.jsdelivr.net/npm/docsify/lib/plugins/emoji.min. js "> </ script >
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+ < script src ="//cdn.jsdelivr.net/npm/docsify/lib/plugins/zoom-image.min. js "> </ script >
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< script src ="//cdn.jsdelivr.net/npm/docsify-pagination/dist/docsify-pagination.min.js "> </ script >
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< script src ="//cdn.jsdelivr.net/npm/docsify-darklight-theme@latest/dist/index.min.js "> </ script >
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</ body >
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