复制SQL Server数据库死锁查询受害者

Question

我有一个SQL Sever 2008 R2数据库安装程序和一个每小时运行一次查询（大约需要3分钟运行）的查询。该查询用其结果填充临时表。

然而，每隔一段时间我得到这个错误：

Transaction (Process ID 63) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction. [SQLSTATE 40001] (Error 1205)

这将停止正在运行的查询。

处理此错误的最佳做法是什么？

在此先感谢。

exec sp_executesql N'EXECUTE msdb.dbo.sp_sqlagent_log_jobhistory @job_id = @P1, @step_id = @P2, @sql_message_id = @P3, @sql_severity = @P4, @run_status = @P5, @run_date = @P6, @run_time = @P7, @run_duration = @P8, @operator_id_emailed = @P9, @operator_id_netsent = @P10, @operator_id_paged = @P11, @retries_attempted = @P12, @session_id = @P13, @message = @P14',N'@P1 uniqueidentifier,@P2 int,@P3 int,@P4 int,@P5 int,@P6 int,@P7 int,@P8 int,@P9 int,@P10 int,@P11 int,@P12 int,@P13 int,@P14 nvarchar(4000)','0A7AFD76-D2EC-463E-A802-8B66241B0D26',2,8153,13,0,20140320,110114,219,0,0,0,0,52,N'Executed as user: DOMAIN\sql. Transaction (Process ID 62) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction. [SQLSTATE 40001] (Error 1205) Warning: Null value is eliminated by an aggregate or other SET operation. [SQLSTATE 01003] (Error 8153). The step failed.'

上面是返回表单分析器。

Answer 1

您需要调查造成死锁的原因。解决方案将完全取决于您找到的内容。

• Analyze Deadlocks with SQL Server Profiler
• Save Deadlock Graphs (SQL Server Profiler)
• How To Monitor Deadlocks in SQL Server
• Deadlock Troubleshooting, Part 1
• Troubleshooting deadlocks in SQL Server

注意，如果你扫描一个表，而被更新死锁是非常：关于这个问题的一些读 l ikely。对复制代理主动修改的数据进行“3分钟”查询可能就是这种情况。理想情况下，您的查询应该优化为仅读取相关数据（例如自上次读取后发生了什么变化）。出一个廉价的方式就是启用版本的数据库，阅读Implementing Snapshot or Read Committed Snapshot Isolation in SQL Server: A Guide：

ALTER DATABASE <dbname> SET READ_COMMITTED_SNAPSHOT ON;