How do I implement connection pooling for Redis using Ruby?

How can I add connection pooling to my Redis setup?

for some reason I can't seem to find any information on this. I'm using redis (3.2.0) set up like so: (you can assume url is parsed ahead of this)

REDIS =  Redis.new(:host => uri.host, 
                   :port => uri.port, 
                   :password => uri.password)