sql deadlock error

deadlocks in SQL ServerNow that the deadlock is unavoidable, there is a mechanism for dealing with deadlocks. Can imagine if your program is an e-commerce site, due to deadlock caused the user's generated order is rollback ...So the processing of deadlocks can be done on two levels in SQL ServerProcessing deadlocks at

deadlocks in SQL ServerNow that the deadlock is unavoidable, there is a mechanism for dealing with deadlocks. Can imagine if your program is an e-commerce site, due to deadlock caused the user's generated order is rollback ...So the processing of deadlocks can be done on two levels in SQL ServerProcessing deadlocks at

Find out the source of deadlock and blocking for SQL Server--Find out the source of SQL Server deadlock and blocking Copy Code code as follows: Use master Go declare @spid int, @bl int DECLARE S_cur CURSOR for Select 0, blocked From (SELECT * from sysprocesses where blocked>0) a Where NOT E

Label:Query out Selectrequest_session_id spid,object_name (resource_associated_entity_id) tableNameFromSys.dm_tran_lockswhereResource_type= ' OBJECT Kill the deadlock process Kill spid Other: EXEC Master.dbo.sp_who_lock--View the current deadlock process EXEC master.dbo.p_killspid ytsafety--Kill the process that caused the deadlock Sp_who_lock as follows: SET

demonstrates a binding connection. 4. Deadlock handling method: (1). Depending on the SQL provided in 2, view the SPID in the wait state and then use the kill spid to kill (the fourth necessary condition for a broken necrosis lock: loop wait); Of course, it's just a temporary solution. We should not be able to troubleshoot deadlocks, kill SP in the user's production environment when we encounter deadlocks

handling method:(1). Depending on the SQL provided in 2, view the SPID in the wait state and then use the kill spid to kill (the fourth necessary condition for a broken necrosis lock: loop wait); Of course, it's just a temporary solution. We should not be able to troubleshoot deadlocks, kill SP in the user's production environment when we encounter deadlocks, we should consider how to avoid deadlocks.(2). Use Set Lock_timeout timeout_period (in milli

table Testdeadlock (Id int constraint pk_testdeadlock_id primary Key int constraint uk_testdeadlock_col2 unique , Remark varchar (100 Then use sqlquerystress, open two reply, respectively, according to the clustered index and nonclustered index, delete the same row of data (the test data will be set when the ID and Col2 are 1),As shownFirst let these two sessions execute (Air line), then insert a row of data into the Testdeadlock table (insert into [Testdeadlock] values (1,1,n

: Set nocount on; SET XACT_ABORT ON; GO -- use TRY-CATCH to enable the code to run begin trybegin tranupdate dbo if an error occurs. goods_sort SET sSortName = 'Women's shoes 'where iSortID = 1003; WAITFOR delay' 00: 00: 05 '; UPDATE dbo. goods SET sGoodsName = 'fat catch' WHERE iID = 2; commit tranend trybegin catchif (XACT_STATE () =-1) rollback tran; -- ERROR_NUMBER () IF the value is 1205, the deadlock

handling method:(1). Depending on the SQL provided in 2, view the SPID in the wait state and then use the kill spid to kill (the fourth necessary condition for a broken necrosis lock: loop wait); Of course, it's just a temporary solution. We should not be able to troubleshoot deadlocks, kill SP in the user's production environment when we encounter deadlocks, we should consider how to avoid deadlocks.(2). Use Set Lock_timeout timeout_period (in milli

' IsProcedure ') = 1)Drop procedure [dbo]. [sp_who_lock]GOUse masterGoCreate procedure sp_who_lockAsBeginDeclare @ 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 Insert into # tmp_lock_who (spid, bl) select 0, blockedFrom (select * from sysprocesses where blocked> 0)Where not exists (select * from sy

releaseThe shared lock is released, and the exclusive lock that A cannot rise due to the exclusive lock of B cannot be released, so A deadlock occurs.Such deadlocks are relatively hidden, but they often occur in projects that are a little larger.SQL server deadlock solution:Let User A's transactions (that is, the first read and then write operations), in the select statement, Update lock is used.Syntax

This article will introduce several major steps for SQL Server Profiler to analyze deadlocks. This is also to help you better manage your databases. In two or more SQL Server processes, a deadlock occurs when each process locks the resources that other processes attempt to lock. For example, the process process1 holds one exclusive lock (X) for table1 ), at the s

occur on the same resource:By the end of this step, we can only confirm that the deadlock has occurred, and that it has not been able to obtain a specific deadlock statement and resource information on the same resource, and the problem cannot be solved fundamentally. 3) in order to check the look dead lock information, the database engine provides a monitoring tool: Trace identity (1222). Open this trace

When I execute a scheduler task in sql2005, try out: the transaction (process ID 86) and another process are deadlocked on the lock resource, and have been selected as the deadlock victim. Run the transaction again. After finding the information on the Internet, I found that the table was closed when I first accessed the table while executing the scheduled task at the same time, and the second was also accessed, this

have a lock time-out period. This means that when a session requests a new resource, if the resource is already locked by another process, the session will remain in the waiting state. There is no doubt that this is problematic. We can use the SQL command to set the lock request timeout. You can also access the global variable @ @LOCK_TIMEOUT to see this value.SET lock_timeout 20000; --Unit is millisecondsWhen the request lock exceeds the set time,

column C2 on table T1. In addition, two SP instances are created, namely select data and update data from t1. Okay. Open a new query window and we will start executing the following query: -- Batch #2 Use deadlocktest Set nocount on While (11 = 1) exec P2 4 Go After the execution starts, we open the third query window and execute the following query: -- Batch #3 Use deadlocktest Set nocount on Create Table # T1 (C2 int, C3 INT) Go W

, ensuring that it is not a nested deadlock. If there is, it will be killed and then returned to sleep. The next wakeup is after 4.9 seconds (the estimated wakeup time is 10 milliseconds). Each decrement of 100 milliseconds will wake up 10 times per second to handle deadlocks.How do I monitor a deadlock? Method One:Windows Performance Monitor (Performance Monitor)Object:SQLServer:LocksCounter:number of Dead

are several long-running transactions to perform parallel operations, when the Query Analyzer processing a very complex query such as a connection query, then because the processing order can not be controlled, there is a possibility of deadlock phenomenon.So, what caused the deadlock?Phenomenon DiagramBy querying the transaction log view of SQL Server, the