Cosmos DB provisioned throughput calculation

Question

I have a database with enabled option "Provision database throughput". I chose 400 RUs as my throughput. If I have 25 collections in my database, does it mean that they will share 400 RUs between each other or it means that the database has 10,000RUs (400RUs * 25 containers) that will be shared between all containers?

I've read this documentation about provisioned throughput on MSDN, but it still unclear for me. How many throughput capacities I have in my case?

Answer 1

Hi @Ihor Dyrman , welcome to Microsoft Q&A forum.

If we choose to set the throughput enables at database level (say 400 RUs), then all the containers in the database will share this throughput. Database would not have (400 * Number of Containers in the database) RUs.

As per the same article "Containers in a shared throughput database share the throughput (RU/s) allocated to that database. With standard (manual) provisioned throughput, you can have up to 25 containers with a minimum of 400 RU/s on the database." This means all the containers will eventually share the RUs configured at database level.

Please let us if this helps or else we can discuss further.

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Answer 2

@Ihor Dyrman Thank you for reaching out.
When you create a database and provision manual throughput, as shown in the picture below, 400RU's will be shared across 25 containers.

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