SQL SERVER性能分析--死锁检测数据库阻塞语句

--生成测试表Ta if not object_id("Ta") is null drop table Ta go create table Ta(ID int Primary key,Col1 int,Col2 nvarchar(10)) insert Ta select 1,101,"A" union all select 2,102,"B" union all select 3,103,"C" go

--测试单表 -----------------------连接窗口1(update\insert\delete)------------------------------ begin tran --update update ta set col2="BB" where ID=2 --或insert --begin tran -- insert Ta values(4,104,"D") --或delete --begin tran -- delete ta where ID=1 --rollback tran -------------------------连接窗口2（查询表）--------------------------------------------- begin tran select * from ta --rollback tran --- --分析-------------------------------------------------- -->SQL SERVER 2005查询死锁进程 select request_session_id as spid, resource_type, db_name(resource_database_id) as dbName, resource_description, resource_associated_entity_id, request_mode as mode, request_status as Status from sys.dm_tran_locks --Result: /* 进程ID 资源类型 数据库 资源描述 资源关链ID 锁类型 进程状态 ----------- ------------- ------ -------------------- ----------------------------- ----- ------ 59 DATABASE Gepro 0 S GRANT 58 DATABASE Gepro 0 S GRANT 57 DATABASE Gepro 0 S GRANT 56 DATABASE Gepro 0 S GRANT 58 PAGE Gepro 1:1904 72057594039435264 IS GRANT 57 PAGE Gepro 1:1904 72057594039435264 IX GRANT 58 OBJECT              Gepro 853578079 IS GRANT 57 OBJECT Gepro 853578079 IX GRANT 57 KEY Gepro (020068e8b274) 72057594039435264     X      GRANT 58 KEY Gepro (020068e8b274) 72057594039435264 S      WAIT (9 行受影响) */

SELECT DISTINCT "进程ID" = STR(a.spid, 4) , "进程ID状态" = CONVERT(CHAR(10), a.status) , "死锁进程ID" = STR(a.blocked, 2) , "工作站名称" = CONVERT(CHAR(10), a.hostname) , "执行命令的用户" = CONVERT(CHAR(10), SUSER_NAME(a.uid)) , "数据库名" = CONVERT(CHAR(10), DB_NAME(a.dbid)) , "应用程序名" = CONVERT(CHAR(10), a.program_name) , "正在执行的命令" = CONVERT(CHAR(16), a.cmd) , "登录名" = a.loginame , "执行语句" = b.text FROM master..sysprocesses a CROSS APPLY sys.dm_exec_sql_text(a.sql_handle) b WHERE a.blocked IN ( SELECT blocked FROM master..sysprocesses ) -- and blocked <> 0 ORDER BY STR(spid, 4) --Result /* 进程ID  进程ID   状态  死锁进程ID  工作站名称 执行命令的用户 数据库名 应用程序名 正在执行的命令 登录名 执行语句 ---- ---------- ------ ---------- ---------- ---------- ---------- ---------------- ---------------------------------------------------------------------- ------------------------- 56 sleeping 0 DC91229126 sa Gepro Microsoft AWAITING COMMAND DC91229126FF442\Administrator SET STATISTICS XML OFF 57 sleeping 0 DC91229126 sa Gepro Microsoft AWAITING COMMAND DC91229126FF442\Administrator SET STATISTICS XML OFF 58 suspended 57 DC91229126 sa Gepro Microsoft SELECT DC91229126FF442\Administrator begin tran select * from ta 59 runnable 0 DC91229126 sa Gepro Microsoft SELECT DC91229126FF442\Administrator SELECT DISTINCT 60 sleeping 0 DC91229126 sa Gepro Toad for S AWAITING COMMAND DC91229126FF442\Administrator SET FMTONLY OFF; 62 sleeping 0 DC91229126 sa Gepro Toad for S AWAITING COMMAND DC91229126FF442\Administrator */ --查连接住信息(spid:57、58) select connect_time,last_read,last_write,most_recent_sql_handle from sys.dm_exec_connections where session_id in(57,58) --查看会话信息 select login_time,host_name,program_name,login_name,last_request_start_time,last_request_end_time from sys.dm_exec_sessions where session_id in(57,58) --查看阻塞正在执行的请求 select session_id,blocking_session_id,wait_type,wait_time,wait_resource from sys.dm_exec_requests where blocking_session_id>0--正在阻塞请求的会话的 ID。如果此列是 NULL，则不会阻塞请求 /* session_id,blocking_session_id,wait_type,wait_time,wait_resource 58 57 LCK_M_S 2116437 KEY: 6:72057594039435264 (020068e8b274) */ --查看正在执行的SQL语句 select a.session_id,sql.text,a.most_recent_sql_handle from sys.dm_exec_connections a cross apply sys.dm_exec_sql_text(a.most_recent_sql_handle) as SQL --也可用函数fn_get_sql通过most_recent_sql_handle得到执行语句 where a.Session_id in(57,58) /* session_id text ----------- ----------------------------------------------- 57 SET STATISTICS XML OFF 58 begin tran select * from ta */

create index IX_Ta_Col1 on Ta(Col1)--用COl1列上创索引,当更新时条件:COl1=102会用到索引IX_Ta_Col1上得到一个排它键的范围锁 ----------------------------连接窗口1 ------------------------------------------------- SET TRANSACTION ISOLATION LEVEL SERIALIZABLE --针对会话设置了 TRANSACTION ISOLATION LEVEL --SERIALIZABLE 幻影读、不可重复读和脏读都不允许 begin tran update ta set col2="BB" where COl1=102 --rollback tran -----------------------------连接窗口2------------------------------------------------ begin tran select * from ta

--查看死锁牺牲品 SELECT  "进程ID[SPID]" = STR(a.spid, 4)   , "进程状态" = CONVERT(CHAR(10), a.status)   , "分块进程ID" = STR(a.blocked, 2)   , "服务器名称" = CONVERT(CHAR(10), a.hostname)   , "执行用户" = CONVERT(CHAR(10), SUSER_NAME(a.uid))   , "数据库名" = CONVERT(CHAR(10), DB_NAME(a.dbid))   , "应用程序名" = CONVERT(CHAR(10), a.program_name)   , "正在执行的命令" = CONVERT(CHAR(16), a.cmd)   , "累计CPU时间" = STR(a.cpu, 7)   , "IO" = STR(a.physical_io, 7)   , "登录名" = a.loginame   , "执行sql" = b.text FROM    master..sysprocesses a CROSS APPLY     sys.dm_exec_sql_text(a.sql_handle) b WHERE   blocked <> 0 ORDER BY spid

--查看进程运行状况    SELECT  "进程ID" = STR(spid, 4)       , "进程ID状态" = CONVERT(CHAR(10), status)       , "分块进程ID" = STR(blocked, 2)       , "工作站名称" = CONVERT(CHAR(10), hostname)       , "执行用户" = CONVERT(CHAR(10), SUSER_NAME(uid))       , "数据库名" = CONVERT(CHAR(10), DB_NAME(dbid))       , "应用程序名" = CONVERT(CHAR(10), program_name)       , "正在执行的命令" = CONVERT(CHAR(16), cmd)       , "累计CPU时间" = STR(cpu, 7)       , "IO" = STR(physical_io, 7)       , "登录名" = loginame FROM    master..sysprocesses     --where blocked = 0 ORDER BY spid
--blocked = 0表示没有阻塞的进程ID；

--查询锁类型 select 进程id=a.req_spid   ,数据库=db_name(rsc_dbid)   ,类型=case rsc_type when 1 then "NULL 资源（未使用）"   when 2 then "数据库"   when 3 then "文件"   when 4 then "索引"   when 5 then "表"   when 6 then "页"   when 7 then "键"   when 8 then "扩展盘区"   when 9 then "RID（行 ID)"   when 10 then "应用程序"   end   ,对象id=rsc_objid   ,对象名=b.obj_name   ,rsc_indid from master..syslockinfo a left join #t b on a.req_spid=b.req_spid

----查看SA用户执行的SQL SELECT  "进程ID[SPID]" = STR(a.spid, 4)   , "进程状态" = CONVERT(CHAR(10), a.status)   , "分块进程ID" = STR(a.blocked, 2)   , "服务器名称" = CONVERT(CHAR(10), a.hostname)   , "执行用户" = CONVERT(CHAR(10), SUSER_NAME(a.uid))   , "数据库名" = CONVERT(CHAR(10), DB_NAME(a.dbid))   , "应用程序名" = CONVERT(CHAR(10), a.program_name)   , "正在执行的命令" = CONVERT(CHAR(16), a.cmd)   , "累计CPU时间" = STR(a.cpu, 7)   , "IO" = STR(a.physical_io, 7)   , "登录名" = a.loginame   , "执行sql" = b.text FROM    master..sysprocesses a CROSS APPLY     sys.dm_exec_sql_text(a.sql_handle) b WHERE   blocked <> 0 OR a.loginame="sa" ORDER BY spid