Redis is consistent, it's just less durable than Postgres. A query cache is a very good usage for it. It's also likely to be faster than Postgres for the simple

Redis is consistent, it's just less durable than Postgres. A query cache is a very good usage for it. It's also likely to be faster than Postgres for the simple operations it is capable of. The only downside is that (for now at least) it is single node, with optional replica slave(s).