欢迎进入C/C++编程社区论坛,与300万技术人员互动交流 >>进入 在QQ群里面有人说自己的数据库恢复模式自动被修改了,但是没有JOB也没有人修改,问我是否查出到底发生了什么。 其实在SQL Server Error Log里面会记录数据库恢复模式被更改的信息。比如我运行下
欢迎进入C/C++编程社区论坛,与300万技术人员互动交流 >>进入
在QQ群里面有人说自己的数据库恢复模式自动被修改了,但是没有JOB也没有人修改,问我是否查出到底发生了什么。
其实在SQL Server Error Log里面会记录数据库恢复模式被更改的信息。比如我运行下面的脚本:
alter database sql2008 set recovery simple
go
alter database sql2008 set recovery full
然后用sp_readerrorlog可以看到下面的信息:
2013-09-1309:57:45.200 spid51 Settingdatabase option RECOVERY to SIMPLEfor database sql2008.
2013-09-1309:57:48.980 spid51 Settingdatabase option RECOVERY to FULLfor database sql2008.
可以看到Error Log获得的信息比较少无法确切知道当时是谁执行的,命令代码,应用程序是什么。但是在Default Trace中会记录对象的变更,事件类为 164,修改数据库的恢复模式也会被记录到这个事件。如果将Default Trace和Error Log的信息结合起来,就可以获得更为详细的资料,从而找到当时运行的脚本,用户名,应用程序名称。
这里面有一个问题,默认情况下sp_readerrorlog只获得当前的错误日志,但是可能错误信息不在这个日志里面。所以下面的脚本使用存储过程sp_enumerrorlogs循环所有的日志文件。
脚本如下:
--查询所有的错误日志文件找到修改Recovery Mode的信息,由于Error Log肯能被Recycle,
--所以我们用Undocomented存储过程mastersp_enumerrorlogs循环所有的错误日志文件
set nocount on
declare @searchString1 varchar(255)
declare @searchString2 varchar(255)
set @searchString1 = 'RECOVERY'
set @searchString2 = 'OPTION'
declare @logs table (LogNo int, StartDate Datetime, FileSize int)
declare @results table (LogFileNo int, LogDate Datetime, ProcessInfovarchar(20),Text varchar(max))
insert into @logs EXEC mastersp_enumerrorlogs
declare cLogs cursor for select LogNo from @logs
declare @LogNo int
open cLogs
fetch cLogs into @LogNo
while @@fetch_status =0
begin
insertinto @results(LogDate, ProcessInfo, Text)
EXECsp_readerrorlog@LogNo,1, @searchString1,@searchString2
update@resultsset LogFileNo =@LogNowhere LogFileNo isnull
fetchcLogsinto @LogNo
end
deallocate cLogs
select * from @results
---循环所有的DefaultTrace文件
declare @logFile varchar(max)
set @logFile =(select path from sys.traces where is_default=1)
set @logFile = left(@logFile,len(@LogFile) - charindex('_',reverse(@LogFile))) + '.trc'
--将日志文件和Trace文件关联,这样就可以获得当时修改Recovery Mode的代码,LoginID,HOSTNAME 等等。
select starttime,*
from fn_trace_gettable(@logFile,null) t
join @results r on t.StartTime between dateadd(ms,-150,r.logDate) and dateadd(ms,150,r.logdate)
andt.spid = substring(r.ProcessInfo,5,10) --required to enable ahash join to be used
where t.EventClass = 164
and EventsubClass = 1

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