CosmosDB Metric Autoscaled RU not returning any data, per partition per region is enabled

Question

CosmosDB Metric Autoscaled RU not returning any data, it has in the past. Per partition per region scaling/feature is enabled.

Answer 1

Hi Howard, Melora,

Welcome to Microsoft Q&A forum.

As I understand, you're encountering an issue with Azure Cosmos DB's autoscale feature, specifically with metrics not returning data when per-partition, per-region scaling is enabled. Here are a few things you can check:

1. Ensure that the enablePerRegionPerPartitionAutoscale property is correctly set to true in your Cosmos DB account configuration.
2. Sometimes, metrics might not be immediately available due to delays in data processing. Check if the metrics appear after some time.
3. Use Azure Monitor to verify if the metrics are being collected correctly. You can set up alerts and dashboards to monitor the autoscale metrics.
4. Since per partition per region is enabled, ensure that there are no region-specific issues affecting the reporting of metrics. Check the Azure status page for any ongoing incidents in the relevant regions.

For more information, please refer the documents:

https://learn.microsoft.com/en-us/azure/cosmos-db/autoscale-faq?tabs=azure-powerShell#how-quickly-does-autoscale-scale-up-based-on-increases-in-traffic-

https://learn.microsoft.com/en-us/azure/cosmos-db/provision-throughput-autoscale#monitoring-metrics

Hope this helps. Do let us know if you any further queries.

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