How many clients can be connected simultaneously on the redis cache?

How many clients can I connect simultaneously to the redis on fly? Is there a limit or it’s theoretically unlimited?

We don’t enforce a limit, but since it’s shared with other customers performance isn’t guaranteed. If you’re doing anything serious (eg not a hobby or test app) we recommend you run your own Redis cluster. We have a launcher for keydb (high-performance Redis fork) which you can run for super cheap using the smallest vm sizes.