how to avoid deadlock in sql server

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 l

Label:First, a scalar-valued function, Diglock, is used to recursively detect if there is a lock loop for each session in SQL Server, and if the function eventually returns 1, the lock loop is detected (that is, a deadlock is detected), and if the final return of 0 indicates that no lock loop is detected. 1 CREATE FUNCTION [dbo].[Diglock] 2 ( 3 @spid int, 4

#tmp_lock_who return 0 We only need to execute Sp_who_lock in the Query Analyzer, we can specifically capture the execution of the blocking process, then we can the corresponding SQL statements or stored procedures for performance improvement and design. So we are in the database design, although not completely avoid deadlock, but can make the number of deadl

, making the most "inexpensive" transaction rollback (based on the number of bytes that the transaction needs to write to the transaction log). You can easily resolve this deadlock in 2 tables by providing an index to the Column2. In that case, SQL Server can perform the lookup (seek) operator of a conforming column, so when you execute a SELECT statement, you ca

blocked processes, in this case, we can improve and design the performance of corresponding SQL statements or stored procedures. Therefore, although we cannot completely avoid deadlocks during database design, we can minimize the number of deadlocks. Increase transaction throughput and reduce system overhead. because there are only a few transactions, you must follow the following principles: Access object

Tags: clean tag exclusive lock nbsp Date started SPI net designationOriginal: SQL Server deadlock troubleshootingRemember the previous customer in the use of software, there are occasional deadlock problems, because the time is uncertain, not good to reproduce the problem, at that time to solve the problem is a bit tri

In fact, the deepest reason for all deadlocks is: resource competitionSQL server deadlock 1:A user A accesses table A (locking table A) and then accesses Table BAnother user B accesses Table B (Table B is locked) and then attempts to access TableAt this time, user A has locked Table B because user B has to wait for User B to release Table B to continue. Well, the old man will have to wait honestly.Similarly

Tags: Extended event xevent extented EventsSQL ServerHow to monitor the deadlock (Deadlock)What is a deadlock? The so-called deadlock : refers to two or more than two processes in the course of execution, because of competing resources or due to the communication between each other caused by a blocking phenomenon, if t

Tags: exe SQL buffer value monitoring database called related permissions heightBackground we monitor the database blocking situation in the database blocking timely email alert alert, in order to better maintain the database, especially to enhance the end customer user experience, we should try to avoid the deadlock in the database situation. We know that collec

"SQL Server 2005 Deadlock resolution Discovery" mentioned a while ago, serious deadlock, the average occurrence of a deadlock every day, in the resolution and processing of SQL server2005 dead