why redis memory usage is increasing fast, but the keys amount is not changing? - Stack Overflow
Alex Xu on Twitter: "Why is 𝐑𝐞𝐝𝐢𝐬 so 𝐟𝐚𝐬𝐭? There are 3 main reasons: 1. Redis is a RAM-based data store. RAM access is at least 1000 times faster than random disk
High memory usage in redis · Issue #715 · laravel/horizon · GitHub
Running Out of RAM on Redis? No More OOM With Hybrid Memory (RAM and Flash) - DZone