Привет,
у нас используется такой метод :
создаем таблицу с одним столбцом, в которую пишем номер заблокированного процесса,
Create table msdb.Admin.blocked
(spid int NULL)on primary
Go

SQL job сканирует эту таблицу и высылает предупреждение, если номер повторяется.

-- Script generated on 2002.02.06 10:03


BEGIN TRANSACTION
DECLARE @JobID BINARY(16)
DECLARE @ReturnCode INT
SELECT @ReturnCode = 0
IF (SELECT COUNT(*) FROM msdb.dbo.syscategories WHERE name = N'[Uncategorized (Local)]') < 1
EXECUTE msdb.dbo.sp_add_category @name = N'[Uncategorized (Local)]'

-- Delete the job with the same name (if it exists)
SELECT @JobID = job_id
FROM msdb.dbo.sysjobs
WHERE (name = N'block_alert')
IF (@JobID IS NOT NULL)
BEGIN
-- Check if the job is a multi-server job
IF (EXISTS (SELECT *
FROM msdb.dbo.sysjobservers
WHERE (job_id = @JobID) AND (server_id <> 0)))
BEGIN
-- There is, so abort the script
RAISERROR (N'Unable to import job ''block_alert'' since there is already a multi-server job with this name.', 16, 1)
GOTO QuitWithRollback
END
ELSE
-- Delete the [local] job
EXECUTE msdb.dbo.sp_delete_job @job_name = N'block_alert'
SELECT @JobID = NULL
END

BEGIN

-- Add the job
EXECUTE @ReturnCode = msdb.dbo.sp_add_job @job_id = @JobID OUTPUT , @job_name = N'block_alert', @owner_login_name = N'sa', @description = N'No description available.', @category_name = N'[Uncategorized (Local)]', @enabled = 0, @notify_level_email = 2, @notify_level_page = 0, @notify_level_netsend = 0, @notify_level_eventlog = 0, @delete_level= 0, @notify_email_operator_name = N'Admin_mail'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback

-- Add the job steps
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobstep @job_id = @JobID, @step_id = 1, @step_name = N'scan', @command = N'insert into msdb.Admin.blocked SELECT SPID FROM master..sysprocesses where blocked <> 0
', @database_name = N'msdb', @server = N'', @database_user_name = N'', @subsystem = N'TSQL', @cmdexec_success_code = 0, @flags = 0, @retry_attempts = 0, @retry_interval = 1, @output_file_name = N'', @on_success_step_id = 0, @on_success_action = 3, @on_fail_step_id = 0, @on_fail_action = 2
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobstep @job_id = @JobID, @step_id = 2, @step_name = N'message', @command = N'if (select count (distinct spid) from msdb.Admin.blocked) <> (select count (*) from msdb.Admin.blocked)
begin
EXEC master..xp_sendmail ''Admin_mail'',''There are blocked processes''
truncate table msdb.Admin.blocked
end', @database_name = N'master', @server = N'', @database_user_name = N'', @subsystem = N'TSQL', @cmdexec_success_code = 0, @flags = 0, @retry_attempts = 0, @retry_interval = 1, @output_file_name = N'', @on_success_step_id = 0, @on_success_action = 1, @on_fail_step_id = 0, @on_fail_action = 2
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXECUTE @ReturnCode = msdb.dbo.sp_update_job @job_id = @JobID, @start_step_id = 1

IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback

-- Add the Target Servers
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobserver @job_id = @JobID, @server_name = N'(local)'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback

END
COMMIT TRANSACTION
GOTO EndSave
QuitWithRollback:
IF (@@TRANCOUNT > 0) ROLLBACK TRANSACTION
EndSave:


Придумал не я ;(