SQLServerAlert发送告警邮件少了的原因

最近突然发现我们部署在数据库上面的告警（Alert），当错误日志里面出现错误时，并不是每个错误日志都会发送邮件出来。如下所示，设置了告警“ SQL Server Severity Event 14 ” 

USE [msdb]
GO
 
 
IF NOT EXISTS(SELECT 1 FROM msdb.dbo.syscategories WHERE NAME='DBA_MONITORING' AND category_class=2)
BEGIN
 
EXEC msdb.dbo.sp_add_category
 @class=N'ALERT',
 @type=N'NONE',
 @name=N'DBA_MONITORING' ;
 
END
GO
 
IF EXISTS(SELECT name FROM msdb.dbo.sysalerts WHERE name= N'SQL Server Severity Event 14')
 
 EXEC msdb.dbo.sp_delete_alert @name=N'SQL Server Severity Event 14'
GO
 
 
EXEC msdb.dbo.sp_add_alert @name=N'SQL Server Severity Event 14',
  @message_id=0,
  @severity=14,
  @enabled=1,
  @delay_between_responses=60,
  @include_event_description_in=1,
  @category_name=N'DBA_MONITORING',
  @job_id=N'00000000-0000-0000-0000-000000000000'
GO
 
 
EXEC msdb.dbo.sp_add_notification @alert_name=N'SQL Server Severity Event 14', @operator_name=N'YourSQLDba_Operator', @notification_method = 1
GO 

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