In the previous script's we have seen how to Find Backup History and restore history on a Sql-Server.This script is much related to perfomance monitring.there are many methods to findout CPU Usage in the previous point of time.however this script helps us in finding out Using TSQL This script uses various internal tables of the sql server instance and joining DMV's for the desired results.
we can use this script to identify if there is a query being run since an hour or any pirticular time comparing it with the amount of CPU usage. The obtained results help us in identifying perfomance bottleneck if at all they are related with the CPU usage. if there is lesser cpu usage while the query being run or the process being executed the we can conlude that something is slowing the query or the process whic is being executed on the sql-server
The image below is run on my personal computer and hence its howing very less numbers for the CPU usage of the sql server. however when you run the same over productionments/dev/testing environ we get different results.
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DECLARE @ts_now bigint = (SELECT cpu_ticks/(cpu_ticks/ms_ticks)FROM sys.dm_os_sys_info); SELECT TOP(60) 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)', 'int') AS record_id, record.value('(./Record/SchedulerMonitorEvent/SystemHealth/SystemIdle)', 'int') AS [SystemIdle], record.value('(./Record/SchedulerMonitorEvent/SystemHealth/ProcessUtilization)', 'int') AS [SQLProcessUtilization], [timestamp] FROM ( SELECT [timestamp], CONVERT(xml, record) AS [record] FROM sys.dm_os_ring_buffers WHERE ring_buffer_type = N'RING_BUFFER_SCHEDULER_MONITOR' AND record LIKE '%
%') AS x ) AS y