Get CPU Utilization History for the last 256 minutes
--(in one minute intervals)
DECLARE @ts_now BIGINT = (
SELECT cpu_ticks / (cpu_ticks / ms_ticks)
FROM sys.dm_os_sys_info WITH (NOLOCK)
);
SELECT TOP (256) SQLProcessUtilization AS [SQL Server Process CPU Utilization]
,SystemIdle AS [System Idle Process]
,100 - SystemIdle - SQLProcessUtilization AS [Other Process CPU Utilization]
,DATEADD(ms, - 1 * (@ts_now - [timestamp]), GETDATE()) AS [Event Time]
FROM (
SELECT record.value('(./Record/@id)[1]', 'int') AS record_id
,record.value('(./Record/SchedulerMonitorEvent/SystemHealth/SystemIdle)[1]', 'int') AS [SystemIdle]
,record.value('(./Record/SchedulerMonitorEvent/SystemHealth/ProcessUtilization)[1]', 'int') AS [SQLProcessUtilization]
,[timestamp]
FROM (
SELECT [timestamp]
,CONVERT(XML, record) AS [record]
FROM sys.dm_os_ring_buffers WITH (NOLOCK)
WHERE ring_buffer_type = N'RING_BUFFER_SCHEDULER_MONITOR'
AND record LIKE N'%<SystemHealth>%'
) AS x
) AS y
ORDER BY record_id DESC
OPTION (RECOMPILE);
