sqlserver中查找长时间未提交事务
欢迎进入Windows社区论坛,与300万技术人员互动交流 >>进入 因为也从sys.dm_tran_session_transactions的第一个查询中得知事务ID,所以可以使用sys.dm_tran_active_transactions来了解更多事务本身的内容 代码如下: select transaction_begin_time, case tra
欢迎进入Windows社区论坛,与300万技术人员互动交流 >>进入
因为也从sys.dm_tran_session_transactions的第一个查询中得知事务ID,所以可以使用sys.dm_tran_active_transactions来了解更多事务本身的内容
代码如下:
select transaction_begin_time,
case transaction_type
when 1 then 'Read/Write transaction'
when 2 then 'Read-Only transaction'
when 3 then 'System transaction'
when 4 then 'Distributed transaction'
end tran_Type,
case transaction_state
when 0 then 'not been comoletely initaialiaed yet'
when 1 then 'initaialiaed but ha notstarted'
when 2 then 'active'
when 3 then 'ended (read-only transaction)'
when 4 then 'commit initiated for distributed transaction'
when 5 then 'transaction prepared and waiting resolution'
when 6 then 'commited'
when 7 then 'being rolled back'
when 0 then 'been rolled back'
end transaction_state
from
sys.dm_tran_active_transactions
where transaction_ID=455520
代码如下:
/*结果:
transaction_begin_time tran_Type transaction_state
2010-12-24 14:05:29.170 Read/Write transaction active
*/
小结:这里演示了使用DMV 排除故障和调查长时间的活动事务的一般技巧。基本步骤如下:
1、查询sys.dm_tran_session_transactions获取会话ID和事务ID之间的映射。
2、查询sys.dm_exec_connections和sys.dm_exec_sql_text查找会话最新执行的命令(most_recent_sql_Handle列)
3、最后,查询sys.dm_tran_active_transactions确定事务被打开了多少时间、事务的类型和事务的状态。
使用这个技巧可以回到应用程序去查明调用的被抛弃的事务(打开但从未提交)以及那些运行时间太长或对于应用程序来说是不必要的不恰当事务。
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