In SQL Server Management Studio run the "Performance - Top Queries By Total CPU Time" report.
In this post, I provide you one script to find out CPU usages of all different SQL Server Objects.
This script is very important for DBA when DBA monitoring CPU usages.
Below is a script:
http://www.dbrnd.com/2015/06/sql-server-cpu-usage-per-different-objects/
Measure CPU Usage Per Database :
WITH cte as (
SELECT SDEPA.DatabaseID
, SUM (SDEQS.total_worker_time) AS CPUTimeInMiliSeconds
FROM sys.dm_exec_query_stats SDEQS
CROSS APPLY
(SELECT CAST(value as int) AS [DatabaseID]
FROM sys.dm_exec_plan_attributes(SDEQS.plan_handle)
WHERE attribute = N'dbid') SDEPA
GROUP BY
SDEPA.DatabaseID)
SELECT COALESCE(DB_NAME(DatabaseID), '{Overhead Processes}') as [Database]
, CAST ([CPUTimeInMiliSeconds] * 1.0 / SUM ([CPUTimeInMiliSeconds]) OVER () * 100.0 as DECIMAL(6, 3)) AS [CPUTime%]
FROM cte
ORDER BY
CAST ([CPUTimeInMiliSeconds] * 1.0 / SUM ([CPUTimeInMiliSeconds]) OVER () * 100.0 as DECIMAL(6, 3)) DESC;
Thống kê top query trên database cụ thể:
SELECT TOP 10 SUBSTRING(qt.TEXT, (qs.statement_start_offset/2)+1,
((CASE qs.statement_end_offset
WHEN -1 THEN DATALENGTH(qt.TEXT)
ELSE qs.statement_end_offset
END - qs.statement_start_offset)/2)+1),
qs.execution_count,
qs.total_logical_reads, qs.last_logical_reads,
qs.total_logical_writes, qs.last_logical_writes,
qs.total_worker_time,
qs.last_worker_time,
qs.total_elapsed_time/1000000 total_elapsed_time_in_S,
qs.last_elapsed_time/1000000 last_elapsed_time_in_S,
qs.last_execution_time,
qp.query_plan,
[DB] = DB_NAME(qt.[dbid])
FROM sys.dm_exec_query_stats qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) qt
CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qp
--ORDER BY qs.total_logical_reads DESC -- logical reads
--ORDER BY qs.total_logical_writes DESC -- logical writes
where DB_NAME(qt.[dbid]) = 'db_name'
ORDER BY qs.total_worker_time DESC -- CPU time
