I have a cosmos db container and currently it has just 100 documents. So when I query with Indexed id (primary key) or non-primary key, then the rsu remains the same.

So, as I have more data, the rsu’s will change right ? Or does cosmos calculates based on more data and gives an average ?

I have id (primary key) as some unique ids and I am setting partition keys to be same as id. Because few times, i need to query based on id. But now there is a new requirement to query also on the basis of non-primary key. So, should I add that to be a partition key (again – unique ids) or add a secondary index ?

The data is not yet in production.