[sidlls]

Redis starts to have issues at high scale, even on sophisticated hardware, that can be quite difficult to debug without a lot of additional effort and storage. It’s not just memory, but odd behavior (e.g. randomly dropped connections) with a lot of connected clients, or hot keys/nodes in a cluster configuration, etc.

These issues can exist in any system, but in my experience it’s especially tough (relatively) to identify and diagnose them with Redis. Once you add lua script usage it can get even worse.