azure cosmosdb very expensive [closed]

Question

Can someone explain how I can configure Azure cosmosDB to not be so expensive? 30€ for 3 days?? It's a small test environment with very few users.

In the backend, I only see that it will cost some cents ...

Here is my Cost overview:

I have around 18 collections but all are only kbits big. It the backend database for the js cms : http://keystonejs.com/

Example scaling for one collection in azure:

Answer 1

You created 18 collections, meaning you have 18 billable database constructs. And with the lowest-cost collection starting at roughly 20 Euro per month (about 5 Euro per 100 RU per month, minimum 400 RU), the math works out: You basically created an environment with 400*18=7200 RU. Perhaps just use fewer collections to reduce your cost footprint (note: collections have no rules around documents being homogeneous). You could use a single collection, since you have such a low amount of data.

EDIT FEB 2018 - note: with database-level RUs (a feature added a few months after the OPs question was posted), the cost model would be very different. 18 collections would be able to share an 1800RU database-level allocation (the minimum is 400RU, up to 4 collections, then 100RU per additional collection). With database-level RU, the cost of an 18-collection configuration would start at 25% of the original cost, based on 400RU per collection.