You are probably using one of those small instances to run your Redis and connect it to a small block storage volume (such as a small AWS EBS volume). You should be aware these instances and volumes were not built for the typical high-throughputs and low-latencies of Redis’ use cases. You probably also suffer occasionally from the “noisy neighbor” phenomenon, in which other cloud applications share the same physical server and storage volume with you, making your Redis performance unstable.
Redise Cloud runs your dataset on the strongest cloud servers, so even if your dataset size is just a few megabytes, you enjoy the best performance available today. In addition, we automatically isolate “noisy neighbors,” so your Redis performance is never affected. Read here for more info.