How to get specific values from Redis INFO

2
votes

Following documentation from, https://redis.io/commands/info

I want to get specific key/values from returned bulk string

For example:

# Rails Controller Code
redis = Redis.new(host: 'localhost', port: 6379)
render json: redis.INFO

... returns ....

# Server
redis_version:999.999.999
redis_git_sha1:3c968ff0
redis_git_dirty:0
......
......

# Memory
used_memory:167560008
used_memory_human:159.80M
used_memory_rss:174358528
used_memory_rss_human:166.28M
.....

I want to only get used_memory and so on.

Is it possible without using Ruby tweaks?

ALSO how can I use MEMORY DOCTOR to get information, given I have initialized the Redis in my controller? (e.g redis = Redis.new(host: 'localhost', port: 6379))

https://redis.io/commands/memory-doctor

Thanks in advance!

1
ruby-on-railsredis

1 Answers

2
votes

Use Hash#slice to get relevant key-value pairs

redis = Redis.new(host: 'localhost', port: 6379)
redis.info #=> returns hash
result = redis.info.slice('used_memory_human', 'used_memory_rss')
#=>  {"used_memory_human"=>"1.10M", "used_memory_rss"=>"700416"}
render json: result