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Tag: Cache

2018

Backend

2018-10-30

为什么不建议在 Redis 使用大 Key

Preview 公司里某位工程师小斌发现在一个 Redis 集群中的 some_big_list 经常出现慢查询,而且 QPS 特别高。初步定位是出现了一个热点的 Key。12newexplore> llen some_big_list500000 上面的命令发现,这个 some_big_list 是一个大 Key,导致 Redis Server 的服务器 CPU idle 很低,结果出现了

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