1. Backup, Integrity Check and Index and Statistics Maintenance
- Inside Ola Hallengren's Maintenance Solution

2. About Me Ola Hallengren http://ola.hallengren.com
DBA in Saxo Bank, a Danish investment bank
SQL Server since 2000

3. An Overview of the Solution
Based on stored procedures and functions
Supports SQL Server 2005, SQL Server 2008 and SQL Server 2008 R2 (and Denali when it is released)
DatabaseBackup - Backup
DatabaseIntegrityCheck – Integrity Check
IndexOptimize – Index and Statistics Maintenance
It’s free!

4. Index Maintenance – Challenges
Indexes are getting fragmented over time, which has a negative impact on performance
Rebuilding and reorganizing indexes uses system resources and generates blocking
Large databases and limited maintenance windows

5. Index Maintenance – Checking the Fragmentation
Checking the fragmentation using sys.dm_db_index_physical_stats
Only rebuild or reorganize indexes that are fragmented
Rebuild heavily fragmented indexes
Reorganize moderately fragmented indexes

6. Index Maintenance - Rebuild and Reorganize Limitations
Online rebuild only in Enterprise Edition
Xml – indexes and spatial indexes cannot be rebuilt online
Indexes with LOB (Large Object) columns cannot be rebuilt online
An index partition cannot be rebuilt online (a partitioned index can be rebuilt online as a whole)
An index with page locking disabled cannot be reorganized

7. IndexOptimize - Core Checking the fragmentation
Three fragmentation groups; low, medium and high
Lets you define the fragmentation thresholds
Lets you define the index maintenance for each group
Secondary index maintenance in case your preferred index maintenance is not possible for an index
Demo

8. IndexOptimize and Statistics
If an index is rebuilt, the statistics is automatically updated
IndexOptimize lets you update statistics on indexes that were not rebuilt
IndexOptimize also lets you update column statistics
Demo

9. IndexOptimize – Selecting Indexes
Select a single schema, object or index
Select a list of schemas, objects or indexes
Exclude indexes
Select indexes using wild-cards
Common for very large databases to put large tables in their own jobs and exclude these objects from the main job (gives better control and parallelization)
Demo

10. IndexOptimize - Advanced
Rebuild or reorganize indexes on a partition level
MAXDOP
SORT_IN_TEMPB
FILLFACTOR and PADINDEX
Time limit if you have a limited maintenance window
Demo

11. DatabaseBackup - Core Full, differential and transaction log backup
Verify the backup
Cleanup of old backup files, if the backup and verify was successful
Demo

12. DatabaseBackup – Handling new databases
Common error messages after adding a new database: "BACKUP LOG cannot be performed … no current database backup.“ "Cannot perform a differential backup … a current database backup does not exist.“
DatabaseBackup is checking if a differential or transaction log backup can be done, before doing the backup
Supports changing the backup type if needed (e.g. from log to full or from differential to full)
New databases are getting backed up quickly after they have been added and no alerts are generated
Demo

13. DatabaseBackup - Advanced
Backup to multiple files (backup striping)
Backup compression
Backup using Quest LiteSpeed, RedGate SQLBackup, RedGate HyperBac or Idera SQLSafe
CHECKSUM
COPY_ONLY
DESCRIPTION
Demo

14. DatabaseIntegrityCheck
DBCC CHECKDB
PHYSICAL_ONLY and NOINDEX for very large databases
Demo

15. Selecting Databases
Common parameter for DatabaseBackup, DatabaseIntegrityCheck and IndexOptimize
Select All Databases, All User Databases or All System Databases
Select a single database or a list of databases
Exclude databases
Select databases using wildcards
Demo

16. Inside the Maintenance Solution
Shared stored procedure for executing commands – Consistent error handling and logging
TRY CATCH or checking?
Some commands (BACKUP DATABASE) return two errors
RAISERROR WITH NOWAIT after each command to clear the output buffer and have instant logging
LOCK_TIMEOUT to prevent index commands from hanging because of blocking
SQL Server Agent CmdExec Job Steps, using sqlcmd and the –b option to continue executing the stored procedure after an error

17. Links
Download script:
Documentation:
License:

18. Questions?