Step 5
Create a job Job_BlockMonitor
by using Job_BlockMonitor.SQL, as shown in Fig 1.3 and Fig 1.4. This job will
not create a schedule.
Source Code to create
the job Job_blockmonitor
-- Script generated on 10/15/2004 1:41 PM
-- By: SQL\Administrator
-- Server: SQL
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'Job_BlockMonitor')
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 ''Job_BlockMonitor'' 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'Job_BlockMonitor'
SELECT @JobID = NULL
END
BEGIN
-- Add the job
EXECUTE @ReturnCode = msdb.dbo.sp_add_job @job_id = @JobID OUTPUT ,
@job_name = N'Job_BlockMonitor', @owner_login_name = N'sa',
@description = N'No description available.', @category_name = N'[Uncategorized (Local)]',
@enabled = 1, @notify_level_email = 0, @notify_level_page = 0, @notify_level_netsend = 0,
@notify_level_eventlog = 2, @delete_level= 0
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'JOb_BlockMonitor', @command = N'usp_blockmonitor 1,0,''d:\BLOCKING.LOG''
', @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:
Download Job_BlockMonitor.SQL
Step 6
Create another job that
runs the procedure usp_blockingalert every minute. (Refer to Fig 1.5, 1.6 and
1.7]
Fig
1.5
Fig
1.6
Fig
1.7
Source code for creating
this job.
-- Script generated on 10/15/2004 1:51 PM
-- By: SQL\Administrator
-- Server: SQL
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'Job_BlockMonitorAlert')
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 ''Job_BlockMonitorAlert'' 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'Job_BlockMonitorAlert'
SELECT @JobID = NULL
END
BEGIN
-- Add the job
EXECUTE @ReturnCode = msdb.dbo.sp_add_job @job_id = @JobID OUTPUT ,
@job_name = N'Job_BlockMonitorAlert', @owner_login_name = N'sa',
@description = N'No description available.', @category_name = N'[Uncategorized (Local)]',
@enabled = 1, @notify_level_email = 0, @notify_level_page = 0, @notify_level_netsend = 0,
@notify_level_eventlog = 2, @delete_level= 0
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'Job_BlockMonitorAlert', @command = N'exec usp_blockingalert 1, ''d:\Blocking.log''',
@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 job schedules
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id = @JobID,
@name = N'Job_BlockMonitorAlert', @enabled = 1, @freq_type = 4,
@active_start_date = 20041015, @active_start_time = 0, @freq_interval = 1,
@freq_subday_type = 4, @freq_subday_interval = 1, @freq_relative_interval = 0,
@freq_recurrence_factor = 0, @active_end_date = 99991231, @active_end_time = 235959
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:
Download Job_BlockMonitorAlert.sql
Process
When blocking occurs, and
if it is more than a minute, it will start the job "Job_BlockMonitor."
"Jobs_MonitorBlock" will collect information instantly about blocking
in the file "D:\Blocking.log" as shown in the Fig 1.8
Fig
1.8
Conclusion
Using this method, you can
collect detailed information on blocking when a blocking duration exceeds one
minute. If you would like to collect the information on blocking when the
duration of blocking exceeds 2 or 3 minutes, then update the jobs schedule to
run for every 2 minutes or three minutes.
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