查看“Redis-bigkeys”的源代码

=inof=
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172.16.200.12:7002> cluster nodes
686cfc039ab7c2c9b55bebff0b97eb9bb4060f78 172.16.20.7:7005@17005 master - 0 1591844242096 9 connected 5461-10922
d73e3338dfebb963967135bd73fe10bd459f9e65 172.16.20.7:7004@17004 master - 0 1591844245101 5 connected 10923-16383

518ca649f51c01498b3ab42b9e62c40f921f6327 172.16.20.12:7003@17003 master - 0 1591844242000 8 connected 0-5460
4c90517a70df13b37752c9199f9ba6da15682ff4 172.16.20.12:7002@17002 myself,slave 686cfc039ab7c2c9b55bebff0b97eb9bb4060f78 0 1591844244000 3 connected


242902c61a434edf2efc15909e7fa33e930351c9 172.16.20.13:7001@17001 slave d73e3338dfebb963967135bd73fe10bd459f9e65 0 1591844243097 5 connected
909a54d51117d2e8bb587656db37c8def525e472 172.16.20.13:7000@17000 slave 518ca649f51c01498b3ab42b9e62c40f921f6327 0 1591844244098 8 connected
172.16.200.12:702> 


此机为 172.16.20.12 703  master   , 7002 是slave  他的 master 是哪个  原来是   mq3  172.16.20.7:7005

redis_cluster]# du  -sh  data/*
2.7G	data/appendonly-7002.aof
2.4G	data/appendonly-7003.aof
1.5G	data/dump_7002.rdb
144K	data/dump_7003.rdb
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= redis-cli --bigkeys=
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 debug  object  key 


第一步 

第一次执行完   会高CPU 

 172.16.20.12 -p 7003

 redis-cli  -c -h 172.16.20.12 -p 7003 -a pass --bigkeys     
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.

# 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).

[00.00%] Biggest string found so far 'sns_cache:userFollowLog:1296748078836308812708058410934272' with 1 bytes
[00.00%] Biggest string found so far 'uv:post:12987950080525078' with 59 bytes
[00.00%] Biggest hash   found so far 'posts:comment_user:12991077241267048:85412991077241267048' with 3 fields
[00.00%] Biggest string found so far 'sns_cache:five_latest_replies_v5:comment_id:12966682424339580' with 534 bytes
[00.00%] Biggest hash   found so far 'userFollowLog:12926532386375374' with 155 fields
[00.01%] Biggest string found so far 'uv:post:12995339861518175' with 933 bytes
[00.01%] Biggest hash   found so far 'postsPraiseLog:12947079027599160' with 12431 fields
[00.01%] Biggest string found so far 'sns_cache:five_latest_replies_v5:comment_id:12873404201224716' with 1575 bytes
[00.02%] Biggest set    found so far 'posts_comment_reply:user_post:12948355526503870' with 421 members
[00.03%] Biggest string found so far 'sns_cache:five_latest_replies_v5:comment_id:12942125413091883' with 2136 bytes
[00.04%] Biggest hash   found so far 'postsPraiseLog:12923869855985512' with 25959 fields
[00.12%] Biggest hash   found so far 'postsPraiseLog:12783531839545344' with 74653 fields
[00.13%] Biggest string found so far 'sns_cache:five_latest_replies_v5:comment_id:12952979705119705' with 2605 bytes
[00.16%] Biggest string found so far 'sns_cache:five_latest_replies_v5:comment_id:12978438783438619' with 2881 bytes
[00.18%] Biggest string found so far 'sns_cache:five_latest_replies_v5:comment_id:13011992277674709' with 3017 bytes
[00.24%] Biggest set    found so far 'posts_comment_reply:user_post:12784388711768064' with 731 members
[00.24%] Biggest list   found so far 'robot:operation_list:like:oTIpr4SkvLsZ' with 100 items
[00.49%] Biggest string found so far 'sns_cache:five_latest_replies_v5:comment_id:12923545866027011' with 3812 bytes
[00.61%] Biggest string found so far 'uv:post:12984703254167595' with 12304 bytes
[02.06%] Biggest list   found so far 'robot:operation_list:follow:ogSLwcZEpvRz' with 102 items
[02.99%] Biggest list   found so far 'robot:operation_list:follow:L0rtLUbHQEFC' with 209 items
[04.07%] Biggest set    found so far 'posts_comment_reply:user_post:12796982571974656' with 826 members
[04.21%] Biggest hash   found so far 'postsPraiseLog:12907301092746796' with 85186 fields
[07.38%] Biggest hash   found so far 'postsPraiseLog:12935131931853999' with 103381 fields
[07.97%] Biggest hash   found so far 'postsPraiseLog:12817607428722673' with 107824 fields
[08.18%] Sampled 1000000 keys so far
[10.78%] Biggest set    found so far 'sns_cache:5dfad08b5f9b1413912353:standard_ref' with 1241 members
[16.37%] Sampled 2000000 keys so far
[24.55%] Sampled 3000000 keys so far
[25.46%] Biggest list   found so far 'robot:operation_list:like:n9gok0IcHqgb' with 298 items
[27.36%] Biggest hash   found so far 'postsPraiseLog:12786292153868288' with 131584 fields
[27.71%] Biggest string found so far 'area_code:list' with 15464 bytes
[30.35%] Biggest string found so far 'groupMatchRankCache' with 16320 bytes
[32.26%] Biggest hash   found so far 'postsPraiseLog:12896706894004677' with 140077 fields
[32.73%] Sampled 4000000 keys so far
[36.49%] Biggest hash   found so far 'postsPraiseLog:12786516420624384' with 193502 fields
[39.84%] Biggest string found so far 'stimulateUserStatisticsListKey' with 24063 bytes
[40.92%] Sampled 5000000 keys so far
[43.44%] Biggest list   found so far 'robot:operation_list:follow:AsNltfXCtZPR' with 300 items
[49.10%] Sampled 6000000 keys so far
[49.54%] Biggest set    found so far 'sns_cache:5dfad630a5251220444421:standard_ref' with 1255 members
[57.29%] Sampled 7000000 keys so far
[65.47%] Sampled 8000000 keys so far
[73.07%] Biggest zset   found so far 'groupAuction:socket' with 12 members
[73.65%] Sampled 9000000 keys so far
[81.84%] Sampled 10000000 keys so far
[85.05%] Biggest list   found so far 'buyback:buybackShareQueue:20200611' with 600 items
[90.02%] Sampled 11000000 keys so far
[98.20%] Sampled 12000000 keys so far

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

Sampled 12040461 keys in the keyspace!
Total key length in bytes is 743432861 (avg len 61.74)

Biggest   list found 'buyback:buybackShareQueue:20200611' has 600 items
Biggest   hash found 'postsPraiseLog:12784108337438720' has 219951 fields
Biggest string found 'stimulateUserStatisticsListKey' has 24063 bytes
Biggest    set found 'sns_cache:5dfad630a5251220444421:standard_ref' has 1255 members
Biggest   zset found 'groupAuction:socket' has 12 members

134 lists with 12778 items (00.00% of keys, avg size 95.36)
137285 hashs with 49491661 fields (01.14% of keys, avg size 360.50)
11899007 strings with 45722370 bytes (98.83% of keys, avg size 3.84)
0 streams with 0 entries (00.00% of keys, avg size 0.00)
4034 sets with 494122 members (00.03% of keys, avg size 122.49)
1 zsets with 12 members (00.00% of keys, avg size 12.00)


输出大概分为两部分，summary之上的部分，只是显示了扫描的过程。summary部分给出了每种数据结构中最大的Key。

第二步 用 debug  object  

 debug object postsPraiseLog:12784108337438720
Value at:0x7fbeb046e110 refcount:1 encoding:hashtable serializedlength:4395140 lru:14786916 lru_seconds_idle:25

172.16.20.12:7003> debug object stimulateUserStatisticsListKey
Value at:0x7fbcde2332b0 refcount:1 encoding:raw serializedlength:10675 lru:14786772 lru_seconds_idle:319
172.16.20.12:7003> strlen stimulateUserStatisticsListKey
(integer) 24063



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