I don't think 10K updates per second are really that difficult for the db (Unless you have locking issues). But at that point your reads should be probably be

I don't think 10K updates per second are really that difficult for the db (Unless you have locking issues). But at that point your reads should be probably be sent to read-only replica's. So you write to a master but all your read-heavy apps and queries run against replicas.