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.
2015-09-18 (first published: 2014-05-14)
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