It depends a lot on what the query patterns are. If your writes are naturally spread out then yes you can get close because the 32x will be writing to 32 differ

It depends a lot on what the query patterns are. If your writes are naturally spread out then yes you can get close because the 32x will be writing to 32 different parts of the database and there won't be cache blocks pingponging around. If all the writes are contending on the same parts of the same tables then you won't get 32x indeed because your queries will be waiting on each other to release locks etc. At least that's my understanding. I've not tuned an app that runs on such a cluster.