Hi @Yuta Harada Thank you for posting your question on Microsoft Q&A and for using Azure services.
My understanding is that you are looking to see the amount of Azure SQL Managed Instance usage (CPU usage, data I/O, etc.) and the amount of usage by internal user or schema.
For the First question, I suggest using the regular SQL Server queries, such as:
SELECT [type] AS [ClerkType], SUM(pages_kb) / 1024 AS [SizeMb]
FROM sys.dm_os_memory_clerks WITH (NOLOCK)
GROUP BY [type]
ORDER BY SUM(pages_kb) DESC
Overview of available options here: Monitoring and performance tuning - Azure SQL Database | Microsoft Learn
CPU usage can be easily monitored with: Monitoring and performance tuning - Azure SQL Database | Microsoft Learn
For the second question: **The amount of usage by internal user or schema. **
There is no such statistics in SQL Server to my knowledge.
hope that helps
Regards,
Oury