Question

我需要创建一个应用程序或服务，通知日志文件何时增加到一定大小以上。电子邮件或其他内容。

Answer 1

sys.master_files视图包含日志文件的大小：

select  size * 8192 / (1024 * 1024) as [Size in MB]
from    sys.master_files
where   type_desc = 'LOG'
        and database_id = db_id('NameOfYourDatabase')

它以8KB块的形式列出大小。

您可以检查SQL代理计划任务的大小，如果超过特定大小，请发送包含sp_send_dbmail的电子邮件。

Answer 2

这是整个脚本化代理程序任务，其中包含上述逻辑。请参见顶部设置的3个变量。（如果您只想生成Windows应用程序日志错误，则运算符名称可以为null）

USE [msdb]
GO
Declare @AdminUserName varchar(255)
Declare @Operator varchar(255)
Declare @EmailNotify bit
Set @AdminUserName = N'YOUR SYSADMIN USER'
set @Operator = N'YOUR OPERATOR NAME'
Set @EmailNotify = 1


/****** Object:  Job [Transaction Logfile Size Monitoring]    Script Date: 08/02/2012 15:39:11 ******/
BEGIN TRANSACTION
DECLARE @ReturnCode INT
SELECT @ReturnCode = 0
/****** Object:  JobCategory [[Uncategorized (Local)]]]    Script Date: 08/02/2012 15:39:11 ******/
IF NOT EXISTS (SELECT name FROM msdb.dbo.syscategories WHERE name=N'[Uncategorized (Local)]' AND category_class=1)
BEGIN
EXEC @ReturnCode = msdb.dbo.sp_add_category @class=N'JOB', @type=N'LOCAL', @name=N'[Uncategorized (Local)]'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback

END
Declare @NotifyLevel int
If @EmailNotify = 1 Begin 
set @NotifyLevel =2 end 
else begin
set @NotifyLevel=0 
set @Operator=null
end

DECLARE @jobId BINARY(16)
EXEC @ReturnCode =  msdb.dbo.sp_add_job @job_name=N'Transaction Logfile Size Monitoring', 
            @enabled=1, 
            @notify_level_eventlog=0, 
            @notify_level_email=@NotifyLevel, 
            @notify_level_netsend=0, 
            @notify_level_page=0, 
            @delete_level=0, 
            @description=N'No description available.', 
            @category_name=N'[Uncategorized (Local)]', 
            @owner_login_name=@AdminUserName, 
            @notify_email_operator_name=@Operator, @job_id = @jobId OUTPUT
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
/****** Object:  Step [Monitor Logfile Size]    Script Date: 08/02/2012 15:39:11 ******/
EXEC @ReturnCode = msdb.dbo.sp_add_jobstep @job_id=@jobId, @step_name=N'Monitor Logfile Size', 
            @step_id=1, 
            @cmdexec_success_code=0, 
            @on_success_action=1, 
            @on_success_step_id=0, 
            @on_fail_action=2, 
            @on_fail_step_id=0, 
            @retry_attempts=0, 
            @retry_interval=0, 
            @os_run_priority=0, @subsystem=N'TSQL', 
            @command=N'Declare @LogSize int;
Declare @LogName varchar(255);
Declare @LogFile varchar(2000);

select  Top 1 @LogName=name,@LogFile=physical_name,@LogSize = convert(float,size) * 8192 / (1024 * 1024) from    sys.master_files
where   type_desc = ''LOG'' Order by size desc

IF (@LogSize > 10240)
BEGIN
Declare @AlertString varchar(5000)
set @AlertString = @LogName + '' : '' + @LogFile + '' has reached a size of '' + Convert(varchar(20),@LogSize) + '' MB.''
RAISERROR(@AlertString, 18,1) with LOG
END
ELSE
BEGIN
RAISERROR(''Transaction Log monitoring complete'', 0, 1)
END', 
            @database_name=N'master', 
            @flags=4
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXEC @ReturnCode = msdb.dbo.sp_update_job @job_id = @jobId, @start_step_id = 1
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXEC @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id=@jobId, @name=N'Hourly Logfile Check', 
            @enabled=1, 
            @freq_type=4, 
            @freq_interval=1, 
            @freq_subday_type=8, 
            @freq_subday_interval=1, 
            @freq_relative_interval=0, 
            @freq_recurrence_factor=0, 
            @active_start_date=20120802, 
            @active_end_date=99991231, 
                @active_start_time=0, 
            @active_end_time=235959, 
            @schedule_uid=N'18435d90-4ca0-4c7a-a8a9-c81f347ba32c'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXEC @ReturnCode = msdb.dbo.sp_add_jobserver @job_id = @jobId, @server_name = N'(local)'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
COMMIT TRANSACTION
GOTO EndSave
QuitWithRollback:
    IF (@@TRANCOUNT > 0) ROLLBACK TRANSACTION
EndSave:

GO

sql日志文件变得太大时发出警报？

2 个答案: