redis之热key hotkeys

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https://developer.aliyun.com/article/117042

数据同步：redis间数据同步可以使用：redis-port、redis-shark

 热点key寻找(内部实现使用monitor，所以建议短时间使用)
facebook的redis-faina 

redis-cli  --hotkeys

[work@a8-dba-cloud-db00.wh cdrom]$ ./redis_7001/bin/redis-cli  -a jJAV0kTokNb8iZvwfqniCxmFZEsbOH5n   -c    -p 7001 -h 192.168.31.33   --hotkeys
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.

# Scanning the entire keyspace to find hot 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).

Error: ERR An LFU maxmemory policy is not selected, access frequency not tracked. Please note that when switching between policies at runtime LRU and LFU data will take some time to adjust.


# 需要在线更改下内存淘汰策略
[work@a8-dba-cloud-db00.wh ~]$ ./redis_7001/bin/redis-cli -c -a jJAV0kTokNb8iZvwfqniCxmFZEsbOH5n -h 192.168.31.33 -p 7001
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
192.168.31.33:7001> config set maxmemory-policy volatile-lfu
OK
192.168.31.33:7001> 




[work@a8-dba-cloud-db00.wh cdrom]$ ./redis_7001/bin/redis-cli  -a jJAV0kTokNb8iZvwfqniCxmFZEsbOH5n   -c    -p 7001 -h 192.168.31.33   --hotkeys
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.

# Scanning the entire keyspace to find hot 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).


-------- summary -------

Sampled 615176 keys in the keyspace!
[work@a8-dba-cloud-db00.wh cdrom]$ 

 

 

 

 

 

 

 

 

 

 

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