View Code --檢測死鎖--如果發生死鎖了，我們怎么去檢測具體發生死鎖的是哪條SQL語句或存儲過程？--這時我們可以使用以下存儲過程來檢測，就可以查出引起死鎖的進程和SQL語句。SQL Server自帶的系統存儲過程sp_who和sp_lock也可以用來查找阻塞和死鎖, 但沒有這里介紹的方法好用。use master go create procedure sp_who_lock as begin declare @spid int,@bl int,@intTransactionCountOnEntry int,@intRowcount int,@intCountProperties int,@intCounter intcreate table #tmp_lock_who (id int identity(1,1),spid smallint,bl smallint)IF @@ERROR<>0 RETURN @@ERRORinsert into #tmp_lock_who(spid,bl) select 0 ,blockedfrom (select * from sysprocesses where blocked>0 ) a where not exists(select * from (select * from sysprocesses where blocked>0 ) b where a.blocked=spid)union select spid,blocked from sysprocesses where blocked>0IF @@ERROR<>0 RETURN @@ERROR -- 找到臨時表的記錄數select @intCountProperties = Count(*),@intCounter = 1from #tmp_lock_whoIF @@ERROR<>0 RETURN @@ERROR if @intCountProperties=0select '現在沒有阻塞和死鎖信息' as message-- 循環開始 while @intCounter <= @intCountProperties begin -- 取第一條記錄select @spid = spid,@bl = blfrom #tmp_lock_who where Id = @intCounter beginif @spid =0 select '引起數據庫死鎖的是: '+ CAST(@bl AS VARCHAR(10)) + '進程號,其執行的SQL語法如下'elseselect '進程號SPID：'+ CAST(@spid AS VARCHAR(10))+ '被' + '進程號SPID：'+ CAST(@bl AS VARCHAR(10)) +'阻塞,其當前進程執行的SQL語法如下'DBCC INPUTBUFFER (@bl )end -- 循環指針下移set @intCounter = @intCounter + 1 enddrop table #tmp_lock_whoreturn 0 end

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View Code --殺死鎖和進程--如何去手動的殺死進程和鎖？最簡單的辦法，重新啟動服務。但是這里要介紹一個存儲過程，通過顯式的調用，可以殺死進程和鎖。use master goif exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[p_killspid]') and OBJECTPROPERTY(id, N'IsProcedure') = 1) drop procedure [dbo].[p_killspid] GOcreate proc p_killspid @dbname varchar(200) --要關閉進程的數據庫名 as declare @sql nvarchar(500) declare @spid nvarchar(20)declare #tb cursor forselect spid=cast(spid as varchar(20)) from master..sysprocesses where dbid=db_id(@dbname)open #tbfetch next from #tb into @spidwhile @@fetch_status=0begin exec('kill '+@spid)fetch next from #tb into @spidend close #tbdeallocate #tb go--用法 exec p_killspid 'newdbpy'

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SELECT TOP 10 [session_id], [request_id], [start_time] AS '開始時間', [status] AS '狀態', [command] AS '命令', dest.[text] AS 'sql語句', DB_NAME([database_id]) AS '數據庫名', [blocking_session_id] AS '正在阻塞其他會話的會話ID', [wait_type] AS '等待資源類型', [wait_time] AS '等待時間', [wait_resource] AS '等待的資源', [reads] AS '物理讀次數', [writes] AS '寫次數', [logical_reads] AS '邏輯讀次數', [row_count] AS '返回結果行數' FROM sys.[dm_exec_requests] AS der CROSS APPLY sys.[dm_exec_sql_text](der.[sql_handle]) AS dest WHERE [session_id]>50 AND DB_NAME(der.[database_id])='dbname' ORDER BY [cpu_time] DESC View Code

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ALTER PROC [dbo].[sp_who_lock2] as SELECT r.[session_id] as [會話ID], r.[request_id] as [請求ID], r.[scheduler_id] as [計劃ID], r.[status] as [狀態], r.[blocking_session_id] as [阻塞會話ID], --r.[statement_start_offset], --r.[statement_end_offset], CASE WHEN r.[statement_start_offset] > 0 THEN CASE r.[statement_end_offset] WHEN -1 THEN SUBSTRING(q.TEXT, (r.[statement_start_offset]/2) + 1, 2147483647) ELSE SUBSTRING(q.TEXT, (r.[statement_start_offset]/2) + 1, (r.[statement_end_offset] - r.[statement_start_offset])/2) END ELSE CASE r.[statement_end_offset] WHEN -1 THEN RTRIM(LTRIM(q.[text])) ELSE LEFT(q.TEXT, (r.[statement_end_offset]/2) +1) END END as [當前查詢], q.[text] as [完整查詢],r.[cpu_time] as [CPU時間(ms)], r.[start_time] as [開始時間], r.[total_elapsed_time] as [執行總時間], r.[reads] as [讀取數], r.[writes] as [寫入數], r.[logical_reads] as [邏輯讀取數], d.[name] as [數據庫名] FROM sys.[dm_exec_requests] r CROSS APPLY sys.[dm_exec_sql_text](r.[sql_handle]) q LEFT JOIN sys.databases d ON (r.database_id=d.database_id) WHERE r.session_id > 50 AND r.session_id <> @@SPID ORDER BY r.[session_id], r.[request_id] View Code

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轉載于:https://www.cnblogs.com/weiqt/articles/2760551.html

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