1 1、查找目前SQL Server所执行的SQL语法，并展示资源情况：
33 SELECT s2.dbid ,
34 DB_NAME(s2.dbid) AS [数据库名] ,
35 --s1.sql_handle ,
36 ( SELECT TOP 1
37 SUBSTRING(s2.text, statement_start_offset / 2 + 1,
38 ( ( CASE WHEN statement_end_offset = -1
39 THEN ( LEN(CONVERT(NVARCHAR(MAX), s2.text))
40 * 2 )
41 ELSE statement_end_offset
42 END ) - statement_start_offset ) / 2 + 1)
43 ) AS [语句] ,
44 execution_count AS [执行次数] ,
45 last_execution_time AS [上次开始执行计划的时间] ,
46 total_worker_time AS [自编译以来执行所用的 CPU 时间总量（微秒）] ,
47 last_worker_time AS [上次执行计划所用的 CPU 时间（微秒）] ,
48 min_worker_time AS [单次执行期间曾占用的最小 CPU 时间（微秒）] ,
49 max_worker_time AS [单次执行期间曾占用的最大 CPU 时间（微秒）] ,
50 total_logical_reads AS [总逻辑读] ,
51 last_logical_reads AS [上次逻辑读] ,
52 min_logical_reads AS [最少逻辑读] ,
53 max_logical_reads AS [最大逻辑读] ,
54 total_logical_writes AS [总逻辑写] ,
55 last_logical_writes AS [上次逻辑写] ,
56 min_logical_writes AS [最小逻辑写] ,
57 max_logical_writes AS [最大逻辑写]
58 FROM sys.dm_exec_query_stats AS s1
59 CROSS APPLY sys.dm_exec_sql_text(sql_handle) AS s2
60 WHERE s2.objectid IS NULL
61 ORDER BY last_worker_time DESC
62
63 2、展示耗时查询：
96 -- List expensive queries
97 DECLARE @MinExecutions int;
98 SET @MinExecutions = 5
99
100 SELECT EQS.total_worker_time AS TotalWorkerTime
101 ,EQS.total_logical_reads + EQS.total_logical_writes AS TotalLogicalIO
102 ,EQS.execution_count As ExeCnt
103 ,EQS.last_execution_time AS LastUsage
104 ,EQS.total_worker_time / EQS.execution_count as AvgCPUTimeMiS
105 ,(EQS.total_logical_reads + EQS.total_logical_writes) / EQS.execution_count
106 AS AvgLogicalIO
107 ,DB.name AS DatabaseName
108 ,SUBSTRING(EST.text
109 ,1 + EQS.statement_start_offset / 2
110 ,(CASE WHEN EQS.statement_end_offset = -1
111 THEN LEN(convert(nvarchar(max), EST.text)) * 2
112 ELSE EQS.statement_end_offset END
113 - EQS.statement_start_offset) / 2
114 ) AS SqlStatement
115 -- Optional with Query plan; remove comment to show, but then the query takes !!much longer time!!
116 --,EQP.[query_plan] AS [QueryPlan]
117 FROM sys.dm_exec_query_stats AS EQS
118 CROSS APPLY sys.dm_exec_sql_text(EQS.sql_handle) AS EST
119 CROSS APPLY sys.dm_exec_query_plan(EQS.plan_handle) AS EQP
120 LEFT JOIN sys.databases AS DB
121 ON EST.dbid = DB.database_id
122 WHERE EQS.execution_count > @MinExecutions
123 AND EQS.last_execution_time > DATEDIFF(MONTH, -1, GETDATE())
124 ORDER BY AvgLogicalIo DESC
125 ,AvgCPUTimeMiS DESC
126
127 3、当前进程及其语句：
149 -- Current processes and their SQL statements
150 SELECT PRO.loginame AS LoginName
151 ,DB.name AS DatabaseName
152 ,PRO.[status] as ProcessStatus
153 ,PRO.cmd AS Command
154 ,PRO.last_batch AS LastBatch
155 ,PRO.cpu AS Cpu
156 ,PRO.physical_io AS PhysicalIo
157 ,SES.row_count AS [RowCount]
158 ,STM.[text] AS SQLStatement
159 FROM sys.sysprocesses AS PRO
160 INNER JOIN sys.databases AS DB
161 ON PRO.dbid = DB.database_id
162 INNER JOIN sys.dm_exec_sessions AS SES
163 ON PRO.spid = SES.session_id
164 CROSS APPLY sys.dm_exec_sql_text(PRO.sql_handle) AS STM
165 WHERE PRO.spid >= 50 -- Exclude system processes
166 ORDER BY PRO.physical_io DESC
167 ,PRO.cpu DESC;
168
169 4、存储过程执行情况：
186 -- Stored Procedure Execution Statistics
187 SELECT ISNULL(DBS.name, '') AS DatabaseName
188 ,OBJECT_NAME(EPS.object_id, EPS.database_id) AS ObjectName
189 ,EPS.cached_time AS CachedTime
190 ,EPS.last_elapsed_time AS LastElapsedTime
191 ,EPS.execution_count AS ExecutionCount
192 ,EPS.total_worker_time / EPS.execution_count AS AvgWorkerTime
193 ,EPS.total_elapsed_time / EPS.execution_count AS AvgElapsedTime
194 ,(EPS.total_logical_reads + EPS.total_logical_writes)
195 / EPS.execution_count AS AvgLogicalIO
196 FROM sys.dm_exec_procedure_stats AS EPS
197 LEFT JOIN sys.databases AS DBS
198 ON EPS.database_id = DBS.database_id
199 ORDER BY AvgWorkerTime DESC;
200
201 5、开销较大的查询：
225 /*
226 开销较大的查询
227 */
228 SELECT ss.SUM_execution_count ,
229 t.text ,
230 ss.SUM_total_elapsed_time ,
231 ss.sum_total_worker_time ,
232 ss.sum_total_logical_reads ,
233 ss.sum_total_logical_writes
234 FROM ( SELECT S.plan_handle ,
235 SUM(s.execution_count) SUM_Execution_count ,
236 SUM(s.total_elapsed_time) SUM_total_elapsed_time ,
237 SUM(s.total_worker_time) SUM_total_worker_time ,
238 SUM(s.total_logical_reads) SUM_total_logical_reads ,
239 SUM(s.total_logical_writes) SUM_total_logical_writes
240 FROM sys.dm_exec_query_stats s
241 GROUP BY S.plan_handle
242 ) AS ss
243 CROSS APPLY sys.dm_exec_sql_text(ss.plan_handle) t
244 ORDER BY sum_total_logical_reads DESC
245
