Download Database Maintenance Plans

Maintenance Plans
Keith Binford
Nebiyu Sorri
Maintenance Plans
Most plans have at least four steps:
• Database consistency checking
• Database backup and backup retention policy
• Index maintenance
• Statistics maintenance
Consistency Checks
Preforming a database consistency check
against a Microsoft SQL Server database
involves validating the logical and physical
integrity of all database objects.
• Schema
• Data allocations
• Page and storage consistency
T-SQL Consistency Check
DBCC CHECKDB
[
[ ( database_name | database_id | 0
[ , NOINDEX
| , { REPAIR_ALLOW_DATA_LOSS | REPAIR_FAST | REPAIR_REBUILD } ]
)]
[ WITH
{
[ ALL_ERRORMSGS ]
[ , EXTENDED_LOGICAL_CHECKS ]
[ , NO_INFOMSGS ]
[ , TABLOCK ]
[ , ESTIMATEONLY ]
[ , { PHYSICAL_ONLY | DATA_PURITY } ]
}
]
]
Consistency Checks
Use the REPAIR options only as a last resort. To repair
errors, we recommend restoring from a backup. Repair
operations do not consider any of the constraints that
may exist on or between tables. If the specified table is
involved in one or more constraints, we recommend
running DBCC CHECKCONSTRAINTS after a repair
operation. If you must use REPAIR, run DBCC CHECKDB
without a repair option to find the repair level to use. If
you use the REPAIR_ALLOW_DATA_LOSS level, we
recommend that you back up the database before you
run DBCC CHECKDB with this option.
Consistency Checks
-- Check the current database.
DBCC CHECKDB;
GO
-- Check the AdventureWorks2012 database
without nonclustered indexes.
DBCC CHECKDB (AdventureWorks2012, NOINDEX);
GO
Creating Maintenance Plans
• T-SQL Statement
• Maintenance Plan Wizard
T-SQL Backup Database
BACKUP DATABASE [AdventureWorks2012] TO DISK =
N'C:\Program Files\Microsoft SQL
Server\MSSQL11.MSSQLSERVER\MSSQL\Backup\AdventureWork
s2012_backup_2013_07_23_123130_6012101.bak' WITH
NOFORMAT, NOINIT, NAME =
N'AdventureWorks2012_backup_2013_07_23_123130_6012101',
SKIP, REWIND, NOUNLOAD, STATS = 10
USE msdb;
GO -- Adds a new job, executed by the SQL Server Agent service, called "HistoryCleanupTask_1".
EXEC dbo.sp_add_job
@job_name = N'HistoryCleanupTask_1',
@enabled = 1,
@description = N'Clean up old task history' ;
GO -- Adds a job step for reorganizing all of the indexes in the HumanResources.Employee table to the HistoryCleanupTask_1 job.
EXEC dbo.sp_add_jobstep
@job_name = N'HistoryCleanupTask_1',
@step_name = N'Reorganize all indexes on HumanResources.Employee table',
@subsystem = N'TSQL',
@command = N'USE AdventureWorks2012
GO ALTER INDEX AK_Employee_LoginID ON HumanResources.Employee REORGANIZE WITH ( LOB_COMPACTION = ON )
GO USE AdventureWorks2012
GO ALTER INDEX AK_Employee_NationalIDNumber ON HumanResources.Employee REORGANIZE WITH ( LOB_COMPACTION = ON )
GO USE AdventureWorks2012
GO ALTER INDEX AK_Employee_rowguid ON HumanResources.Employee REORGANIZE WITH ( LOB_COMPACTION = ON )
GO USE AdventureWorks2012
GO ALTER INDEX IX_Employee_OrganizationLevel_OrganizationNode ON HumanResources.Employee REORGANIZE WITH (
LOB_COMPACTION = ON )
GO USE AdventureWorks2012
GO ALTER INDEX IX_Employee_OrganizationNode ON HumanResources.Employee REORGANIZE WITH ( LOB_COMPACTION = ON )
GO USE AdventureWorks2012
GO ALTER INDEX PK_Employee_BusinessEntityID ON HumanResources.Employee REORGANIZE WITH ( LOB_COMPACTION = ON )
GO ',
@retry_attempts = 5,
@retry_interval = 5 ;
GO -- Creates a schedule named RunOnce that executes every day when the time on the server is 23:00.
EXEC dbo.sp_add_schedule
@schedule_name = N'RunOnce',
@freq_type = 4,
@freq_interval = 1,
@active_start_time = 233000 ;
GO -- Attaches the RunOnce schedule to the job HistoryCleanupTask_1.
EXEC sp_attach_schedule
@job_name = N'HistoryCleanupTask_1'
@schedule_name = N'RunOnce' ;
GO
Creating Maintenance Plans
Maintenance Plan Wizard
Creating Maintenance Plans
Maintenance Plan Wizard
References:
Microsoft SQL Server 2012 by Patrick LeBlanc
MSDN Database Consistency Check
http://msdn.microsoft.com/en-us/library/ms176064.aspx
MSDN Creating a Maintenance Plan
http://msdn.microsoft.com/en-us/library/ms191002.aspx
END