SQL SERVER死鎖查詢，死鎖分析，解鎖，查詢佔用

From: https://www.cnblogs.com/K-R-/p/18431639

簡單點的處理方法：

1、查詢死鎖的表

select request_session_id spid,OBJECT_NAME(resource_associated_entity_id) tableName
from sys.dm_tran_locks where resource_type='OBJECT'

2、解鎖

declare @spid int
Set @spid = 79 --鎖表程序
declare @sql varchar(1000)
set @sql='kill '+cast(@spid as varchar)
exec(@sql)

專業點的處理方法：

1.查詢死鎖的表：

SELECT
    request_session_id spid,
    OBJECT_NAME(
        resource_associated_entity_id
    ) tableName
FROM
    sys.dm_tran_locks
WHERE
    resource_type = 'OBJECT'

2.分析被鎖死的原因：

select t1.resource_type                                [資源鎖定型別]
     , DB_NAME(resource_database_id)                as 資料庫名
     , t1.resource_associated_entity_id                鎖定物件
     , t1.request_mode                              as 等待者請求的鎖定模式
     , t1.request_session_id                           等待者SID
     , t2.wait_duration_ms                             等待時間
     , (select TEXT
        from sys.dm_exec_requests r
               cross apply
             sys.dm_exec_sql_text(r.sql_handle)
        where r.session_id = t1.request_session_id) as 等待者要執行的SQL
     , t2.blocking_session_id                          [鎖定者SID]
     , (select TEXT
        from sys.sysprocesses p
               cross apply
             sys.dm_exec_sql_text(p.sql_handle)
        where p.spid = t2.blocking_session_id
)                                                      鎖定者執行語句
from sys.dm_tran_locks t1,
     sys.dm_os_waiting_tasks t2
where t1.lock_owner_address = t2.resource_address

3.解鎖：

create Proc Sp_KillAllProcessInDB
@DbName VarChar(100)
as
if db_id(@DbName) = Null
begin
Print 'DataBase dose not Exist'
end
else
 
Begin
Declare @spId Varchar(30)
 
DECLARE TmpCursor CURSOR FOR
Select 'Kill ' + convert(Varchar, spid) as spId
from master..SysProcesses
where db_Name(dbID) = @DbName
and spId <> @@SpId
and dbID <> 0
OPEN TmpCursor
 
FETCH NEXT FROM TmpCursor
INTO @spId
 
WHILE @@FETCH_STATUS = 0
 
BEGIN
 
Exec (@spId)
 
FETCH NEXT FROM TmpCursor
INTO @spId
 
END
 
 
CLOSE TmpCursor
DEALLOCATE TmpCursor
 
end

4、查詢SQL佔用資源情況：

SELECT TOP 20
    total_worker_time/1000 AS [總消耗CPU 時間(ms)],execution_count [執行次數],
    qs.total_worker_time/qs.execution_count/1000 AS [平均消耗CPU 時間(ms)],
    last_execution_time AS [最後一次執行時間],max_worker_time /1000 AS [最大執行時間(ms)],
    SUBSTRING(qt.text,qs.statement_start_offset/2+1, 
        (CASE WHEN qs.statement_end_offset = -1 
        THEN DATALENGTH(qt.text) 
        ELSE qs.statement_end_offset END -qs.statement_start_offset)/2 + 1) 
    AS [使用CPU的語法], qt.text [完整語法],
    dbname=db_name(qt.dbid),
    object_name(qt.objectid,qt.dbid) ObjectName
FROM sys.dm_exec_query_stats qs WITH(nolock)
CROSS apply sys.dm_exec_sql_text(qs.sql_handle) AS qt
WHERE execution_count>1
ORDER BY total_worker_time DESC