In this post, I am sharing one SQL Script to find TOP 20 most used or executed query in SQL Server.

Database Administrator always prefers to find most long running queries, but It is also required to check most executed queries.

Because most executed queries might take average 1 second or 2 second for execution, but total number execution count 10 times than few long running queries.

If we find the total number of execution count more than our expectation, we can take the necessary decision like: remove redundant queries from the code.

SELECT TOP 20
	deqs.execution_count AS TotalExecutionTime
	,OBJECT_NAME(objectid) AS ObjectName
	,QueryText = SUBSTRING(
		dest.text,
		deqs.statement_start_offset/2,         
		(CASE WHEN deqs.statement_end_offset = -1 
			THEN len(CONVERT(nvarchar(MAX), dest.text)) * 2 
			ELSE deqs.statement_end_offset 
			END - deqs.statement_start_offset)/2)	
	,DatabaseName = db_name(dest.dbid) 
FROM sys.dm_exec_query_stats AS deqs
CROSS APPLY sys.dm_exec_sql_text(deqs.sql_handle) AS dest
ORDER BY deqs.execution_count DESC

You can also access few related articles:

SQL Server: Script to find top 20 running query, which are utilizing more CPU

SQL Server: Script to find top 20 Stored Procedure, which are utilizing more CPU

In this post, I am sharing a script find the usage of CPU for all different SQL Server Objects.

Using this script, DBA can monitor the CPU usages.

Below is a script:

SELECT 
	DB_NAME(st.dbid) AS DatabaseName
	,OBJECT_SCHEMA_NAME(st.objectid,dbid) AS SchemaName
	,cp.objtype AS ObjectType
	,OBJECT_NAME(st.objectid,dbid) AS Objects
	,MAX(cp.usecounts)AS Total_Execution_count
	,SUM(qs.total_worker_time) AS Total_CPU_Time
	,SUM(qs.total_worker_time) / (max(cp.usecounts) * 1.0) AS Avg_CPU_Time 
FROM sys.dm_exec_cached_plans cp 
INNER JOIN sys.dm_exec_query_stats qs 
	ON cp.plan_handle = qs.plan_handle
CROSS APPLY sys.dm_exec_sql_text(cp.plan_handle) st
WHERE DB_NAME(st.dbid) IS NOT NULL
GROUP BY DB_NAME(st.dbid),OBJECT_SCHEMA_NAME(objectid,st.dbid),cp.objtype,OBJECT_NAME(objectid,st.dbid) 
ORDER BY sum(qs.total_worker_time) desc

In this post, I am sharing a script to find slowest running queries in SQL Server.

Below is a SQL Query:

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
	) AS Query
	,qp.query_plan
	,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
	,qs.last_elapsed_time
	,qs.last_execution_time	
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