sql2005 性能调校 观察各种资源的使用情况

查询某个数据库内各对象使用内存缓存区资源的统计

01 CREATE SCHEMA myScript
02 GO
03 CREATE PROC myScript.spBufferUsed @db sysname
04 as
05 DECLARE @sql varchar(8000)
06 SET @sql='
07 select  p.object_id
08         ,OBJECT_SCHEMA_NAME(object_id, database_id) as SchemaName
09         ,object_name(p.object_id,b.database_id) as objname
10         ,p.index_id
11         ,buffer_count=count(*)
12 from ' + @db + '.sys.allocation_units a,
13      ' + @db + '.sys.dm_os_buffer_descriptors b,
14      ' + @db + '.sys.partitions p
15 where a.allocation_unit_id = b.allocation_unit_id
16 and a.container_id = p.hobt_id
17 and b.database_id = db_id('''+@db +''')
18 group by b.database_id,p.object_id, p.index_id
19 order by buffer_count desc'
20 exec(@sql)
21 GO
22
23 EXEC myScript.spBufferUsed 'Northwind'

 

清空缓存区信息并重新查询后，观察缓存区的使用情况

1 --清空内存缓存区中现有的信息
2 DBCC DROPCLEANBUFFERS
3
4 --故意利用查询记录，将硬盘信息留在内存缓存区中
5 select * from adventureWorks.Person.Contact
6 select * from adventureWorks.HumanResources.Employee
7
8 --利用先前查询内存缓存区的存储过程列出使用状态
9 exec myScript.spBufferUsed 'AdventureWorks'

 

显示累计最消耗 CPU 时间的前50个运行计划

01 CREATE PROC myScript.spHighestCPUTime
02 AS
03 SELECT TOP 50
04     total_worker_time/1000 AS [总消耗CPU 时间(ms)],execution_count [运行次数],
05     qs.total_worker_time/qs.execution_count/1000. as [平均消耗CPU 时间(ms)],
06     SUBSTRING(qt.text,qs.statement_start_offset/2+1,
07         (case when qs.statement_end_offset = -1
08         then DATALENGTH(qt.text)
09         else qs.statement_end_offset end -qs.statement_start_offset)/2 + 1)
10     as [使用CPU的语法], qt.text [完整语法],
11     qt.dbid, dbname=db_name(qt.dbid),
12     qt.objectid,object_name(qt.objectid,qt.dbid) ObjectName
13
14 FROM sys.dm_exec_query_stats qs
15 cross apply sys.dm_exec_sql_text(qs.sql_handle) as qt
16 ORDER BY
17         total_worker_time DESC

 

清空运行计划缓存后，重复运行语法，观察缓存运行计划被重复使用与消耗时间的纪录

01 --查看缓存中的执行计划已被执行的次数与累计所耗的时间
02 EXEC myScript.spHighestCPUTime
03
04 --清空执行计划内存
05 --再重新通过相同的存储过程运行时，可以看到所有的记录都被清空
06 DBCC FREEPROCCACHE
07
08 --重新建立新的存储过程计划被重复使用的记录，查看相关的时间
09 WHILE 1=1
10   SELECT * FROM AdventureWorks.Person.Contact
11 GO
12 EXEC myScript.spHighestCPUTime

 

显示累计最常重新编译的25个运行计划

01 CREATE PROC myScript.spListRecompile
02 AS
03 select top 25
04     plan_generation_num,
05     SUBSTRING(qt.text,qs.statement_start_offset/2+1,
06         (case when qs.statement_end_offset = -1
07         then DATALENGTH(qt.text)
08         else qs.statement_end_offset end -qs.statement_start_offset)/2 + 1)
09         as stmt_executing,
10     qt.text,
11     execution_count,
12     sql_handle,
13     dbid,
14     db_name(dbid) DBName,
15     objectid,
16     object_name(objectid,dbid) ObjectName
17 from sys.dm_exec_query_stats as qs
18     Cross apply sys.dm_exec_sql_text(sql_handle) qt
19 where plan_generation_num >1
20 order by plan_generation_num

 

查询某个数据库内各对象使用内存缓存区资源的统计

show source

 

显示锁定与被锁定之间的链状关系

01 create proc myScript.spBlockInfo
02 as
03 select t1.resource_type as [信息锁定类型]
04     ,db_name(resource_database_id) as [数据库名]
05     ,t1.resource_associated_entity_id as [锁定的对象]
06     ,t1.request_mode as [等待者需求的锁定类型]
07     ,t1.request_session_id as [等待者sid]
08     ,t2.wait_duration_ms as [等待时间]
09     ,(select text from sys.dm_exec_requests as r
10         cross apply sys.dm_exec_sql_text(r.sql_handle)
11         where r.session_id = t1.request_session_id) as [等待者要运行的批处理]
12     ,(select substring(qt.text,r.statement_start_offset/2+1,
13             (case when r.statement_end_offset = -1