How to calculate how much CPU requirement for SQL Server

Question

Hi

How to calculate the CPU requirement in a SQL Server

Answer 1

Hi @SVA ,

Welcome to Microsoft Q&A!
I recommend you to read this Microsoft blog: Monitor CPU usage on SQL Server and Azure SQL.
There are the following methods:

1. Microsoft SQL Server Performance Dashboard
2. Dynamic Management views(sys.dm_os_ring_buffers)
3. Perf Mon

Best regards,
Seeya

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Answer 2

Hi ShanV,

Thanks for reaching out to Microsoft Q&A.

There is no single method through which you can guess the CPU requirement without studying the current database cpu consumptions. Assuming you are a starter, I have given the below link which explains with use case and scripts that you can use to assess the current cpu requirements for your databases, once found you will have an idea on how many CPUs you should allocate for your needs.

https://www.mssqltips.com/sqlservertip/6195/sql-server-function-to-measure-cpu-usage-per-database/

Please Upvote and Accept as answer if the reply was helpful.

Answer 3

Hi @SVA ,

Welcome to Microsoft Q&A!
I recommend you to read this Microsoft blog: Monitor CPU usage on SQL Server and Azure SQL.
There are the following methods:

1. Microsoft SQL Server Performance Dashboard
2. Dynamic Management views(sys.dm_os_ring_buffers)
3. Perf Mon

Best regards,
Seeya

---

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 4

The required CPU depends on many factors, like count of users, workload, database sizes and so on.

Answer 5

There is not really a way to "calculate" the CPU usage.

However, SQL Server is rarely CPU dependent. When CPU usage is high, it is usually an indication of another problem, bad query plan, not enough RAM, page swapping, etc.