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Maintenance Plansfor beginners

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Kariera IT Kraków | 22 Feb 2014 | KoprowskiT - Maintenance Plans for Beginners

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Doroczna konferencja Polskiej Grupy Użytkowników SQL Server – kilka faktów

28 kwietnia – całodzienne warsztaty

29-30 kwietnia – trzy ścieżki po pięć sesji każda

Stadion Miejski we Wrocławiu

Najlepsi prelegenci z Polski i Europy

Impreza integracyjna

Olbrzymia dawka wiedzy

http://conference.plssug.org.pl/

http://conference.plssug.org.pl/

Select {BIO}

polish sql server user group leader

microsoft certified trainer

pass sql azure virtual chapter co-founder

blogger, influencer, technical writer

over 8 years living in data center in wrocław

bout 14 years in it/banking area

trainer, auditor, consultant

speaker at many international conferences: sql server community launch, time for sharepoint,

codecamps, sharepoint community launch, cissp day, sql in the city, infotrams, sql bits, sqlsaturday, careercon, sharepoint & sql connection, it camp,

deep dives co-author: high availability of sql server in the context of service level agreements


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ENGLISH

maksymalny stopień równoległości prostych opcji

max degree of parallelism

Zwalniane spację w plikach bazy danych

Retain freed space in database files

Baza danych jest zagęszczonym mleku do stron ciągłych, ale strony nie są cofniętych przydziałów, a pliki bazy danych nie zmniejszać. Użyj tej opcji, jeśli oczekujesz, że baza

danych, aby rozwinąć ponownie i nie chcesz zmienić alokację przestrzeni. Po wybraniu tej

opcji pliki bazy danych nie zmniejszać możliwie. Korzysta z opcji NOTRUNCATE.

The database is condensed to contiguous pages but the pages are not deallocated, and the

database files do not shrink. Use this option if you expect the database to expand again, and

you do not want to reallocate space. With this option, the database files do not shrink as much as possible. This uses the NOTRUNCATE option.


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AGENDA

Maintenance Plans – what are you talking about?

Maintenance Plans – how, where, when?

Methods, tools, right (?) ways

What Maintenance Plans can do you You

Short Demo

Q&A


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Maintenance Plans – what we are talking about?


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Maintenance Plans – what are you talking about?

Clean Environment

Silence

Knowledge about environment

Productivity / Performance

DEFINITION:

A database maintenance plan is a set of specific, proactive task

that need to be performed regularly on databases

to ensure their adequate performance and availability


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HOW:

Maintenance Plan Wizard

Maintenance Plan Designer

T-SQL Scripts

PowerShell Scripts

WHERE

SQL Server Management Studio from Standard and above

See you in… Express

WHEN:

BEFORE: problems / service windows

AFTER: maintaining / clients back to home


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HOW: Maintenance Plan Wizard

Very simple (although advanced) wizard

Providing possibility for creation simple task in dozens of seconds

Enough in many cases, environments

Limited but include many options

Limitations:

number of databases

granularity

single tasks / no multitasking

no scripting for another instances

some known problems in previous version of SQL Server

SQL Server 2005 Service Pack 2 / SQL Server 2008


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HOW: Maintenance Plan Designer

More flexible and advanced tool (not on this session)

Graphical user interface with SSIS

Most often used for „really DBA”

Increased features

Workflow for specified tasks with execution plan

Multitasking

Two additional Maintenance plans

Execute T-SQL Statement

Notify Operator


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LIMITATIONS: Maintenance Plan wizard & Designer

Limitations for both tools / those ideas are not possible

Identification and removing fragmentation for physical files

Identification abandoned, duplicated, forgotten indexes

Providing backup on demand

Werification good quality of backup

Werification succesful restore

Monitoring of performance

Monitoring of SQL OS

Monitoring of Windows OS

Monitoring available space


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Maintenance Plan: t-sql & powershell scripts

Functionality for „Real *Tru* DBA”

Necessary for working with multiple databases, instances, server farms

Feauters for scripting:

Access to OS

Posibility of moving

Scripts sharing

One of the best examples and tools for free:

HTTP://OLA.HALLENGREN.COM/


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http://ola.hallengren.com/

(Everything I do) I do it for you


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Maintenance plans: available tasks

Check Database Integrity | DBCC CHECKDB

Shrink Database | NEVER, NEVER, NEVER

Reorganize Index | ALTER INDEX , and next Update Statistics

Rebuild Index | ALTER INDEX, Update Statistics are not necessary

Update Statistics | Sp_updatestats

History Cleanup | Using msdb, don’t do that too much frequently

Execute SQL Server Agent Job | Providing scrip using wen You work with agent

Back Up Database (Full) | Executing BACKUP DATABASE with FULL option >>Transaction Log

Back Up Database (Differential) | Executing BACKUP DATABASE with DIFFERENTIAL option

Back Up Database (Transaction Log) | Executing BACKUP LOG, frequency...

Maintenance Cleanup Task | Most complicated feature ? BAK, TRN, TXT


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Functionality: Verify Integrity of Database

using DBCC CHECKDB

Daily

Weekly

Monthly

DBCC CHECKDB (’database_name’) WITH NO_INFOMSGS

Suppresses all informational messages.

DBCC CHECKDB (’database_name’) WITH NO_INFOMSGS, ALL_ERRORMSGS

Displays all reported errors per object. All error messages are displayed by default. Specifying or omittingthis option has no effect. Error messages are sorted by object ID, except for those messages generated

from tempdb database.

In SQL Server Management Studio, the maximum number of error messages returned is 1000.

DBCC CHECKDB (’database_name’) NOINDEX

Specifies that intensive checks of nonclustered indexes for user tables should not be performed. Thisdecreases the overall execution time. NOINDEX does not affect system tables because integrity checks are

always performed on system table indexes


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http://msdn.microsoft.com/en-us/library/ms190768.aspx

POSSIBILITIES: SHRINK DATABASE

NEVER USE THIS OPTION IN MAINTENANCE PLANS

MDF & LDF

100 GB reserved

15 GB in use

DBCC SHRINKDATABASE

or

DBCC SHRINKFILE | MANUAL MODE

Reduction of Reserved Space


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POSSIBILITIES: Maintain Index & Column Statistics

Automation:

AUTO_CREATE_STATISTICS

AUTO_UPDATE_STATISTICS

Executing automatically after: INSERT, UPDATE, DELETE

UPDATE STATISTICS table_name WITH FULLSCAN

When:

Never…

Just after Index Reorganization

On the days when we’re not using Index Rebuild or Reorganize Index

Important options (UPDATE STATISTICS):

All existing statistics

Column statistics only

Index statistics only


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POSSIBILITIES: Reorganize vs rebuild


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POSSIBILITIES: history clean up (MSDB)

Choosing the data (right data) for deleting:

Backup and restore history

SQL Server Agent job history

Maintenance Plan history


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Summary


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SUMMARY

We should remember about:

Task sequences

Task execution

Task priority

Documentation

Using: daily / weekly / occasionally

Better expoloration of our environment

Monitoring (partially) of performance

Standard and above (sorry)

Maintenance Plan Wizard

for beginners and small installations

Maintenance Plan Designer

Adult , more complicated, wide environment


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LINKS

Brad McGehee | Brad’ Sure Guide to SQL Server Maintenance Plans

„My new eBook, Brad’ Sure Guide to SQL Server Maintenance Plans is now available as

a free, 269 page PDF eBook. The book is designed for part-time or novice DBAs who

want to learn how to properly create Maintenance Plans using the tools that come with

SQL Server Management Studio (SSMS) in SQL Server 2005/2008.

LINK: http://bit.ly/1ijdnah

Ola Hallengreen | Maintenance Plans Scripts PASS slidedeck

„The SQL Server Maintenance Solution comprises scripts for running backups,

integrity checks, and index and statistics maintenance on all editions of Microsoft

SQL Server 2005, SQL Server 2008, SQL Server 2008 R2, SQL Server 2012. The

solution is based on stored procedures, sqlcmd utility, and SQL Server Agent jobs”

LINK: http://bit.ly/1b220Ns


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