how to resolve deadlock in sql server

this time, we can use the following stored procedures to detect the process and SQL statements that cause the deadlock. The built-in system stored procedures sp_who and sp_lock of SQL Server can also be used to find blocking and deadlocks, but the method described here is not easy to use. Use masterGoCreate procedur

Sessions 1 and Session 2 cannot continue until the other party frees resources. Therefore, SQL Server chooses a session in the deadlock as the "deadlock victim." Note: The deadlock victim's session will be killed and the transaction will be rolled back. Note: deadlocks and

Record the deadlock process and solution of the company's warehouse database server, and the warehouse database Four Conditions for deadlock: Mutual exclusion: resources cannot be shared and can only be used by one process. Hold and wait: processes that have obtained resources can apply for new resources again. No pre-emption: allocated resources cannot be forcib

large transaction, the transaction is too large to allow other sessions to wait for exclusive lock time to become longer 2, everyone is using the same nonclustered index, and scan the Pricingexpressproductcode field 3, the index of repeated values are many From the above symptoms can be basically judged, this nonclustered index is useless, you can disable the ALTER INDEX [ix_pricingexpressproductcode_state] on [dbo]. [Orderxxx] DISABLE After disabling, the

Label:"SQL Server 2005 deadlock resolution Exploration" mentioned earlier, deadlock severity, an average of one deadlock per day, and a lot of data and ideas in resolving and handling SQL server2005 deadlocks, and then we used the

('dbcc inputbuffer ('+ @ spid + ')') If @ sign = 'deadlocked process' exec ('Kill '+ @ spid) Set @ I = @ I + 1 End End Else While @ I Begin Select @ s = 'dbcc inputbuffer ('+ Cast (process ID as varchar) +') 'from # t where id = @ I Insert # T1 exec (@ s) Set @ I = @ I + 1 End Select a. *, the SQL statement of the Process = B. eventinfo From # t a join # t1 B on A. ID = B. ID End Go Set quoted_identifier off Go Set

Select T.username,count (*) from v$session T GROUP by T.username //Find the sql_id value that a user is executing based on the user group session Select * From V$session t where T.username = ' BUDGET ' and t.sql_id are NOT NULL //lookup corresponding SQL_ID's corresponding SQL statement select M.sql_text from V$session T, V$sqlarea m where t.username = ' BUDGET ' and t.sql_id = m.sql_id // SELECT * from V$sqlarea t where T. sql_id = ' G92sy7kwt6mrq '

The use of SQL Server as a database application system, will not be able to sometimes create a deadlock, after the deadlock, the maintenance personnel or developers will mostly only through the sp_who to find the deadlock process, and then killed with Sp_kill. With Sp_who_lo

Find out what's locked up.The slow response of the system means you should do some research. Your search is best started by measuring the number and frequency of locks occurring on the system. If your system environment is highly transactional, it is common for individual applications to compete for resources, which can lead to locking. The key to solving these problems is the ability to identify locked resources and the process of competing for resources.Sp_lockSp_lock This system stored proced

This article describes the principles of fragmentation in SQL Server, the concepts of internal fragmentation and external fragmentation. And the methods of solving the fragmentation and filling factors. In the database, often every feature that is added to a particular aspect of performance is also weakened by performance on the other. Knowledge of the system's learning database to weigh against specific si

Label:This article describes the principles of fragmentation in SQL Server, the concepts of internal fragmentation and external fragmentation. And the methods of solving the fragmentation and filling factors. In the database, often every feature that is added to a particular aspect of performance is also weakened by performance on the other. Knowledge of the system's learning database to weigh against speci

complex math calculations before, it was necessary to put this work on other layers and increase the overhead of the network. SQL2000 supports UDFs, now supports complex mathematical calculations, the return value of the function is not too large, such a large overhead. User-defined functions consume a large amount of resources, like cursors, if large results are returned using stored procedures A, do not use the same function repeatedly in a sentence, waste resources, put the result in the var

modified is found, the X lock on the resource being modified is required. SQL Server avoids deadlock problems with u locks. Because S-Lock and S-Lock are compatible, the U-Lock and S-lock are compatible to make the update lookup not affect the data lookup, and the U-Lock and U-Lock are not compatible, thus reducing the possibility of

running all agents at the distributor consumes a significant amount of resources. Subscribers are autonomous, disconnected, and/or mobile. The Subscriber determines when the connection and synchronization changes are made. Typically used in conjunction with merge replication. 1. Environmental preparedness1.win7+sql 20,122 Machinessuch as: 10.58.8.114 login Account testb 10.58.8.96 login Account TestA2. Create a new two DB i

If you establish a connection server with a 32-bit database server on a 64-bit computer and use the connection server for Distributed queries on 64-bit computers, the following error message is returned: Server: Message 7399 , Level 16 , Status 1 , Line 1 Ole db Provider ' Sqloledb ' Reported an