SQL Server Agent Jobs

SQL Server Agent

Job components

Component	Purpose
Job	A collection of steps that execute sequentially or conditionally
Step	A single task (T-SQL, PowerShell, SSIS package, OS command)
Schedule	When to run (daily, weekly, monthly, on-demand, at startup)
Alert	Responds to SQL Server events (errors, performance conditions)
Operator	Who to notify (email, pager — email is the standard)
Notification	What to send when a job succeeds, fails, or completes

Creating maintenance jobs

Kenji’s standard maintenance jobs on NorthStar MI:

Index maintenance job

-- Create a job for weekly index maintenance
EXEC msdb.dbo.sp_add_job @job_name = 'Weekly Index Maintenance',
    @description = 'Rebuild fragmented indexes on all user databases';

-- Add a step
EXEC msdb.dbo.sp_add_jobstep @job_name = 'Weekly Index Maintenance',
    @step_name = 'Rebuild Indexes',
    @subsystem = 'TSQL',
    @command = N'
DECLARE @sql NVARCHAR(MAX) = '''';
SELECT @sql += ''ALTER INDEX '' + i.name + '' ON '' + SCHEMA_NAME(o.schema_id) + ''.'' + o.name + '' REBUILD;''
FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL, ''LIMITED'') ips
JOIN sys.indexes i ON ips.object_id = i.object_id AND ips.index_id = i.index_id
JOIN sys.objects o ON i.object_id = o.object_id
WHERE ips.avg_fragmentation_in_percent > 30 AND ips.page_count > 1000 AND i.name IS NOT NULL;
EXEC sp_executesql @sql;';

-- Schedule: every Sunday at 2 AM
EXEC msdb.dbo.sp_add_jobschedule @job_name = 'Weekly Index Maintenance',
    @name = 'Sunday 2AM',
    @freq_type = 8,  -- weekly
    @freq_interval = 1,  -- Sunday
    @active_start_time = 020000;

-- Enable the job
EXEC msdb.dbo.sp_update_job @job_name = 'Weekly Index Maintenance', @enabled = 1;

Standard maintenance schedule

Job	Frequency	Time	Purpose
Index rebuild	Weekly (Sunday)	2 AM	Defragment indexes over 30%
Statistics update	Daily	1 AM	Full scan on critical tables
DBCC CHECKDB	Weekly (Saturday)	3 AM	Integrity verification
Backup (full)	Daily	11 PM	Full database backup
Backup (log)	Every 15 min	—	Transaction log backup
Cleanup old data	Monthly	4 AM	Archive/purge per retention policy

Alerts and notifications

Configuring Database Mail (required for email notifications)

-- Enable Database Mail (MI supports this natively)
EXEC sp_configure 'show advanced options', 1; RECONFIGURE;
EXEC sp_configure 'Database Mail XPs', 1; RECONFIGURE;

-- Create a mail profile and account
EXEC msdb.dbo.sysmail_add_account_sp
    @account_name = 'NorthStar DBA',
    @email_address = 'dba@northstar.com',
    @mailserver_name = 'smtp.northstar.com';

EXEC msdb.dbo.sysmail_add_profile_sp @profile_name = 'DBA Alerts';
EXEC msdb.dbo.sysmail_add_profileaccount_sp
    @profile_name = 'DBA Alerts',
    @account_name = 'NorthStar DBA', @sequence_number = 1;

Creating an operator and notification

-- Create an operator
EXEC msdb.dbo.sp_add_operator @name = 'DBA Team',
    @email_address = 'dba-team@northstar.com';

-- Add notification to the job
EXEC msdb.dbo.sp_update_job @job_name = 'Weekly Index Maintenance',
    @notify_level_email = 2,  -- on failure
    @notify_email_operator_name = 'DBA Team';

Creating alerts

-- Alert on severity 17+ errors (resource issues)
EXEC msdb.dbo.sp_add_alert @name = 'Severity 17 Alert',
    @severity = 17,
    @notification_message = 'Resource error detected on NorthStar MI';

EXEC msdb.dbo.sp_add_notification @alert_name = 'Severity 17 Alert',
    @operator_name = 'DBA Team', @notification_method = 1;  -- email

Troubleshooting Agent jobs

Problem	Where to Check	Fix
Job not running	Job history in SSMS → Agent → Job Activity Monitor	Check schedule, ensure job is enabled
Job fails on a step	Job history → step detail → error message	Fix the T-SQL error, check permissions
Notifications not sent	Database Mail log (msdb.dbo.sysmail_event_log)	Verify SMTP settings, check mail queue
Agent not starting (VMs)	Windows Services → SQL Server Agent	Set to Automatic startup, check service account
Job running too long	sp_help_jobactivity or Activity Monitor	Investigate blocking, I/O issues, optimise the job

-- View recent job history
SELECT j.name, h.step_name, h.run_status, h.run_date, h.run_time, h.message
FROM msdb.dbo.sysjobhistory h
JOIN msdb.dbo.sysjobs j ON h.job_id = j.job_id
WHERE h.run_date >= CONVERT(INT, CONVERT(VARCHAR, GETDATE()-7, 112))
ORDER BY h.run_date DESC, h.run_time DESC;

-- Check running jobs
EXEC msdb.dbo.sp_help_jobactivity;

Question

What are the key components of a SQL Server Agent job?

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Answer

Job (container), Steps (individual tasks — T-SQL, PowerShell, SSIS), Schedule (when to run), Operators (who to notify), Notifications (on success/failure/completion).

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Question

What must be configured before SQL Server Agent can send email notifications?

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Answer

Database Mail — configure a mail profile and account with SMTP settings. Then set the Agent to use that profile. Enable Database Mail XPs via sp_configure.

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Question

Where do you check why a SQL Server Agent job failed?

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Answer

Job history: SSMS → SQL Server Agent → Job Activity Monitor → right-click job → View History. Or query msdb.dbo.sysjobhistory for the error message.

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Knowledge Check

Kenji's weekly index maintenance job has been failing every Sunday. The error message says 'permission denied on object sys.dm_db_index_physical_stats.' What should he check?

AThe SQL Server Agent service account needs sysadmin roleBThe job step's 'Run As' account needs VIEW SERVER STATE permissionCThe index maintenance script has a syntax errorDDatabase Mail is not configured correctly

Check Answer

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