Listing How Many CPU’s SQL Server Physically Sees in SQL Server

Hello everyone,

In this article, I will try to give information about listing how many CPUs SQL Server physically sees in SQL Server.

In SQL Server, in some cases, you may want to list how many CPUs SQL Server physically sees.

You can easily do this using the code below.

DECLARE @xp_msver TABLE
(
    [idx] [INT] NULL,
    [c_name] [VARCHAR](100) NULL,
    [int_val] [FLOAT] NULL,
    [c_val] [VARCHAR](128) NULL
);

INSERT INTO @xp_msver
EXEC ('[master]..[xp_msver]');;

WITH                          [ProcessorInfo]
                              AS (SELECT ([cpu_count] / [hyperthread_ratio]) AS [number_of_physical_cpus],
                                         CASE
                                             WHEN hyperthread_ratio = cpu_count THEN
                                                 cpu_count
                                             ELSE
                                         (([cpu_count] - [hyperthread_ratio]) / ([cpu_count] / [hyperthread_ratio]))
                                         END AS [number_of_cores_per_cpu],
                                         CASE
                                             WHEN hyperthread_ratio = cpu_count THEN
                                                 cpu_count
                                             ELSE
                                         ([cpu_count] / [hyperthread_ratio])
                                         * (([cpu_count] - [hyperthread_ratio]) / ([cpu_count] / [hyperthread_ratio]))
                                         END AS [total_number_of_cores],
                                         [cpu_count] AS [number_of_virtual_cpus],
                                         (
                                             SELECT [c_val] FROM @xp_msver WHERE [c_name] = 'Platform'
                                         ) AS [cpu_category]
                                  FROM [sys].[dm_os_sys_info])
SELECT [number_of_physical_cpus],
       [number_of_cores_per_cpu],
       [total_number_of_cores],
       [number_of_virtual_cpus],
       LTRIM(RIGHT([cpu_category], CHARINDEX('x', [cpu_category]) - 1)) AS [cpu_category]
FROM [ProcessorInfo];

Good luck to everyone in business and life.

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Yavuz Selim Kart

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