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SQL Server CPU Usage History Histogram

Returns a summary of CPU usage by SQL Server over the last 4 hours (default).

Using the sample values collected in the dm_os_ring_buffers dmv, this query will show CPU usage by the SQL Server process for the last for hours even if you have no other benchmarking activities in place on your server yet.

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2015-09-18 (first published: )

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Question of the Day

BIT_COUNT() IV

In SQL Server 2025, I run this code:

select bit_count('A')
What is returned?

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