每个数据库的实际CPU使用率

Question

我想测量特定数据库的当前CPU使用率，我编写了以下查询以获取此信息。但是，我不确定此查询的准确性。

DECLARE @Fm INT;
DECLARE @FTime DATETIME;
SELECT @FTime = getdate(),@Fm = SUM(dmqs.total_worker_time) 
FROM sys.dm_exec_query_stats dmqs 
CROSS APPLY 
(SELECT 
CONVERT(INT, value) AS [DatabaseID] 
FROM sys.dm_exec_plan_attributes(dmqs.plan_handle)
WHERE attribute = N'dbid') dmpa
where DatabaseID=7
GROUP BY dmpa.DatabaseID
WAITFOR DELAY '00:00:01'
SELECT CAST((SUM(dmqs.total_worker_time) - @Fm)* 1.0  / SUM(dmqs.total_worker_time)  * 100 AS DECIMAL(5, 2))
FROM sys.dm_exec_query_stats dmqs 
 CROSS APPLY 
 (SELECT 
 CONVERT(INT, value) AS [DatabaseID] 
 FROM sys.dm_exec_plan_attributes(dmqs.plan_handle)
 WHERE attribute = N'dbid') dmpa
 where DatabaseID=7
 GROUP BY dmpa.DatabaseID

Answer 1

[查看Glen Berry的诊断查询。他有一些与CPU相关的信息，包括实例中每个数据库的CPU使用率细分。https://www.sqlskills.com/blogs/glenn/category/dmv-queries/