Azure Cosmos DB
An Azure NoSQL database service for app development.
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Azure Portal for Cosmos Database/Mongo API seems to calculate wrong RU sum
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Pertti Rantanen
0
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When create CosmosDb account using MongoAPI with 2 databases, cannot set sensible RU values for second database because its total sum checks calculates too big totals. -Total maximum in account is set to 8000RU -First database has shared RU with max value 2000 -Second database has also shared RU, and when try to set max value to 4000, portal says that it cannot be done because total sum is then 12000 and your limit is 8000. In my math 2000+4000=6000, why Azure portal calculates 12000 ?
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GeethaThatipatri-MSFT 29,377 Reputation points Microsoft Employee2024-01-12T14:35:10.31+00:00 Hi, @Pertti Rantanen Welcome to Microsoft Q&A thanks for posting your question.
Can you please share your configuration screenshot and the error message you got?
Regards
Geetha
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2 answers
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Pertti Rantanen 0 Reputation points
2024-01-17T06:44:29.8366667+00:00 -
Pertti Rantanen 0 Reputation points
2024-01-17T06:45:27.6133333+00:00 Screen dumps with descriptions in attached pdf
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GeethaThatipatri-MSFT 29,377 Reputation points Microsoft Employee
2024-01-23T16:47:50.97+00:00 -
GeethaThatipatri-MSFT 29,377 Reputation points Microsoft Employee
2024-01-25T16:53:44.1533333+00:00 @Pertti Rantanen I am just checking in to see if you have any updates on my above comment. I am looking forward to hearing from you.
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Pertti Rantanen 0 Reputation points
2024-01-31T10:44:55.46+00:00 @GeethaThatipatri-MSFT Thank you for resoponse Settings: Geo-Redundancy: enabled, Multi region writes: disabled, Availability zones: disabled (Last one cannot be changed afterwards) Does it eats more RU than given database maximums in these settings ? What should be done ?
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Pertti Rantanen 0 Reputation points
2024-02-05T08:36:20.1233333+00:00 @GeethaThatipatri-MSFT Now I know what it does to get double that money than pricing calculator tells. When create database it asks about location (region which finally will be the write region), and it asks if multi-region write is enabled or disabled. But it tells nothing about read regions, and even when you disable multi region writes, it seems to create additional read region. In my case write region is West Europe and it adds additional read region North Europe. (I have two Cosmos accounts, both have done this). Then in Cost Management page it tells that account has two regions and uses that. When delete that read region, then it caclulates price using one region. BUT: If you open Azure Pricing calculator/CosmosDb, you see that there is told that it is the count or Write Regions which should effects to price, there is nothing about read regions which may be there even when multi region write is disabled, and without you never has selected them. So final question is: Does count of read regions really multiply prices, or is it just error in the calculator of the portal ?
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Pertti Rantanen 0 Reputation points
2024-02-12T15:08:19.8133333+00:00 @GeethaThatipatri-MSFT See question at the end of the previous comment
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GeethaThatipatri-MSFT 29,377 Reputation points Microsoft Employee
2024-02-27T15:31:00.72+00:00 @Pertti Rantanen I don't see anything wrong here? If you have two regions defined (the minimal definition of "geo-redundancy enabled" though more detail would be good), the account limit is the sum total of all regions because that is what will be billed – 2 copies of 2 DBs at 2000 RUs each is correctly 8000 RUs.
Regards
Geetha