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I used redis for the first time to cache a computationally-expensive fragment. It works great. To further my learning, I'd like to query redis to examine what's it's storing, the expiry, any metadata it captures, and simply to learn how to use redis.

How can query redis on heroku?

What I tried

I tried shelling into the dyno with heroku ps:exec

Then tried using the redis-cli

redis
# -bash: redis: command not found
redis-cli
#-bash: redis-cli: command not found
Based on this I tried looking in a handful of places:
ls /bin | grep redis
ls /usr/local/bin | grep redis
ls /sbin | grep redis
but didn't find anything.
I noted I can get the REDIS_URL (and REDIS_TLS_URL) config variables like so
heroku config | grep REDIS
REDIS_TLS_URL:  rediss://:asdfasdfasdf@ec2-12-345-67-890.compute-1.amazonaws.com:31840
REDIS_URL:      redis://:asdfasdfasdf@ec2-12-345-67-890.compute-1.amazonaws.com:31839
but I'm not sure if I can shell directly into these or query them from my terminal somehow?
                Worth noting that if you have a lot of keys, running KEYS * will block Redis for the duration of the run. Well, it does that even if you only have a few, but you'll care more if you have a lot of them. ;) Check out the SCAN command if this matters to you.
– Guy Royse
                Mar 2 at 14:37
        
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