我需要查看我们的 Redis 缓存，看看我们最大存储值的大小是多少。我有 Python 经验或可以直接使用 redis-cli。有没有办法迭代数据库中的所有键，以便我可以检查每个值的大小？
看起来 SCAN 是遍历键的方法，但我仍在研究如何使用它来获取值的大小并存储最大值。
最佳答案
既然你提到了 redis-cli 作为一个选项，它有一个 build it 函数，几乎可以完成你所要求的(以及更多)。
redis-cli --bigkeys
# Scanning the entire keyspace to find biggest keys as well as
# average sizes per key type. You can use -i 0.1 to sleep 0.1 sec
# per 100 SCAN commands (not usually needed).
这里是一个总结输出的例子:
Sampled 343799 keys in the keyspace!
Total key length in bytes is 9556361 (avg len 27.80)
Biggest string found '530f8dc7c7b3b:39:string:87929' has 500 bytes
Biggest list found '530f8d5a17b26:9:list:11211' has 500 items
Biggest set found '530f8da856e1e:75:set:65939' has 500 members
Biggest hash found '530f8d619a0af:86:hash:16911' has 500 fields
Biggest zset found '530f8d4a9ce31:45:zset:315' has 500 members
68559 strings with 17136672 bytes (19.94% of keys, avg size 249.96)
68986 lists with 17326343 items (20.07% of keys, avg size 251.16)
68803 sets with 17236635 members (20.01% of keys, avg size 250.52)
68622 hashs with 17272144 fields (19.96% of keys, avg size 251.70)
68829 zsets with 17241902 members (20.02% of keys, avg size 250.50)
您可以查看完整的输出示例 here
关于python - 找出 Redis 数据库中键的最大字符串值大小，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26870303/