Replication--使用MSlogreader_history查看日志读起的延迟和事务命令

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MSlogreader_history 表存放本地分发服务器关联的日志读取器代理的历史记录

time

记录消息的时间。

delivery_latency

命令从进入发布数据库到进入分发数据库之间的滞后时间。

delivered_transactions

会话中传递的事务总数。

delivered_commands

会话中传递的命令总数。

average_commands

会话中传递的平均命令数。

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WITH T AS (

SELECT ROW_NUMBER()OVER(PARTITION BY agent_id ORDER BY time ASC) AS RID,

[agent_id],

[delivered_transactions],

[delivered_commands],

[average_commands],

[delivery_latency],

[time]

FROM distribution.dbo.MSlogreader_history

)

SELECT

T1.[agent_id],

T1.[time],

(T1.[delivered_transactions]-T2.[delivered_transactions]) AS Transcations,

(T1.[delivered_commands]-T2.[delivered_commands]) AS Commands,

T1.[delivery_latency]

FROM T AS T1

INNER JOIN T AS T2

ON T1.agent_id=T2.agent_id

AND T1.RID=T2.RID+1

参考：http://msdn.microsoft.com/zh-cn/library/ms176065(v=sql.120).aspx