Automating Table Defrag

May 26, 1999

I'd like to build a process that will identify all the tables in a database with a scan density less than 100% and generate 'dbcc dbreindex' statements for them. The 'dbcc showcontig' command displays the information I want but I don't know how to access this information from within a script. Any ideas out there?

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Jul 19, 2007

Isn't there any way to automate Windows defrag? Isn't there any undocumented parameters for DEFRAG.EXE?

Canada DBA

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Jul 30, 2004

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Thanks.

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Hello,

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I have this table

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(
[c1] [int] NOT NULL,
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[ModifiedDate] [datetime2](7) NOT NULL CONSTRAINT [IMDF_Test_ModifiedDate] DEFAULT (sysdatetime()),

[Code] ....

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Mar 14, 2007

I have been reading many things on the internet and I wanted to create a thread asking my question here. We currently do all the re-indexing and show contig's etc to maintain my sql data and to ensure everything is good to go there.

My question is, what about the physical drive and data. We house our mdf's on a raid 1_0 and our ldfs on raid 5. I am wondering if I need to defrag these drives b/c if not am i impacting my I/O on that box. If so should I stop the sql service so that it does not corrupt SQL data? Any help on this topic would be great.



-patrick

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Feb 13, 2004

Folks

Our sql server machine is badly in need of a defrag however I'm a bit weary of doing this as I'm really not sure of the implications or indeed how to do it.

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Cheers

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Hello,
I am working with a very large db (850+gig) that is in desperate need of defragging. I am familiar with DBCC Reindex and DBCC IndexDefrag but am concerned that these processes will take an extremely long time to run. Has anyone had any experience with any 3rd party tools that better/faster then DBCC? Or any ideas or suggestions how best to attack this? Among the many tables with large footprints and millions of rows, I have 3 tables with reserved space over 100g also 3 tables with over 500Mil rows (1 tbl with > 1bil rows). This is a 24x7 db.

Thanks in advance for any ideas and suggestions
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I#ve been doing disaster recovery on a web box that died today.

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5 minutes on a 10GB database. Not bad!

I checked the DEFRAG and UPDATE STATS processes that run overnight.

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That is taking an average of 30 minutes ...

Is DBREINDEX the equivalent of an UPDATE STATISTICS WITH FULLSCAN, or is it in some way a smaller-sample version?

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I am new to sql server and we have sql server 2000

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DBCC INDEXDEFRAG ( 0, PS_ORD_LINE, PSAORD_LINE )
DBCC INDEXDEFRAG ( 0, PS_ORD_LINE, PSBORD_LINE )
DBCC INDEXDEFRAG ( 0, PS_ORD_LINE, PSCORD_LINE )
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Oct 2, 2007

This script was based on the original posted here: http://sql-server-performance.com/Community/forums/p/20584/114940.aspx#114940

I use the REORGANIZE option of ALTER INDEX. It's default is ONLINE, no matter what the engine edition and makes for simpler code.

I also make heavy use of my own logging tables, which are included at the bottom of the sp.

Please, feel free to comment. I like getting feedback about my scripts and it seems rarely that happens...


USE Admin
GO

IF EXISTS (SELECT [name] FROM Admin.sys.objects WHERE [name] = 'usp_DB_DeFrag' AND TYPE = 'P')
DROP PROCEDURE dbo.usp_DB_DeFrag
GO

CREATE PROCEDURE dbo.usp_DB_DeFrag (@DBName sysname, @Percentage float = 10)
-- EXEC Admin.dbo.usp_DB_Defrag @DBName = 'FooDB', @Percentage = 10
AS

/******************************************************************************
**Name: Admin.dbo.usp_DB_DeFrag.sql
**
**Description: Defragment indexes using REORGANIZE for online operation.
**Record historical fragmentation information to a permanant table
**for trend/history analysis.
**
**Depends on: SQL2005 >= SP2 due to object_name() usage. See BOL for details.
**Admin.dbo.Process_Log - Table
**Admin.dbo.FragTracking - Table
**
** TODO: Open to suggestions...
**
**Author: G. Rayburn <grayburn@---.com>
**
**Date: 10/02/2007
**
*******************************************************************************
**Modification History
*******************************************************************************
**
**Initial Creation: 10/02/2007 G. Rayburn <grayburn@---.com>
**
*******************************************************************************
**
******************************************************************************/
SET NOCOUNT ON;

DECLARE @DynFragList varchar(1024)
, @DynDBAlter varchar(256)
, @DynDefragDriver varchar(max)
, @DynUpdateStats varchar(1024)
, @OrigRecoveryModel nvarchar(128)
, @Process_Name varchar(150)
, @Message varchar(256)
, @Error int

-- Cursor objects:
, @SchemaName sysname
, @ObjectName sysname
, @IndexName sysname
, @IndexType nvarchar(60)
, @AvgFrag int
, @PageCount int
, @RecordCount int
--, @GhostRecordCnt bigint
--, @Partition int
;


-- DEBUG:
--SET @DBName = 'FooDB'
--SET @Percentage = 10;


SET @Process_Name = 'usp_DB_Defrag run on [' + @DBName + ']';


-- Ensure that @DBName is a valid db for db_id() usage.
IF (db_id(@DBName)) IS NULL
BEGIN
SET @Message = '[' + @DBName + '] is not a valid database on ' + @@SERVERNAME + ', please check your spelling and try again.'

INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'ERROR', 9999, @Message)

RETURN
END;


-- Record startup message:
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'INFO', 0, '[START] - usp_DB_Defrag @DBName = [' + @DBName + '], @Percent = ' + CONVERT(varchar(3),@Percentage) + '.')


-- Check & alter recovery model if neccessary:
SET @OrigRecoveryModel = (SELECT CONVERT(varchar(55),DATABASEPROPERTYEX(@DBName, 'Recovery')))

IF @OrigRecoveryModel = 'FULL'
BEGIN
SET @DynDBAlter = 'ALTER DATABASE [' + @DBName + ']
SET RECOVERY BULK_LOGGED';

EXEC (@DynDBAlter);

SET @Error = (SELECT @@ERROR)
IF @Error = 0
BEGIN
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'SUCCESS', CONVERT(varchar(15),@Error), 'Successfully set database [' + @DBName + '] to BULK_LOGGED recovery model.')
END;
ELSE
BEGIN
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'ERROR', CONVERT(varchar(15),@Error), 'Failed to set database [' + @DBName + '] to BULK_LOGGED recovery model.')
END;
END;
ELSE
BEGIN
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'INFO', 0, 'Database [' + @DBName + '] is in ' + @OrigRecoveryModel + ' recovery model so no need to change it.')
END;



-- Temp table of initial DBCC results:
CREATE TABLE #_FragList
(
ObjectName varchar(100)
, [Object_ID] int
, Index_ID int
, Partition_Number int
, IndexType varchar(60)
, alloc_unit_type_desc nvarchar(60)
, avg_fragmentation_in_percent float
, avg_fragment_size_in_pages float
, avg_page_space_used_in_percent float
, fragment_count bigint
, page_count bigint
, record_count bigint
, forwarded_record_count bigint
, ghost_record_count bigint
);

INSERT INTO #_FragList

SELECT
LEFT(object_name([object_id], db_id(@DBName)),100)
, [object_id]
, index_id
, partition_number
, index_type_desc
, alloc_unit_type_desc
, avg_fragmentation_in_percent
, avg_fragment_size_in_pages
, avg_page_space_used_in_percent
, fragment_count
, page_count
, record_count
, forwarded_record_count
, ghost_record_count

FROM sys.dm_db_index_physical_stats (db_id(@DBName), NULL, NULL, NULL, 'DETAILED')

WHERE avg_fragmentation_in_percent >= @Percentage
AND index_id >= 1
AND page_count >= 1000

ORDER BY -- Ensure Clustered indexes are rebuilt first.
[object_id]
, index_id ASC;

CREATE INDEX IDX_ObjNameIndexID ON #_FragList (ObjectName, Index_id);


-- Historical tracking:
INSERT INTO Admin.dbo.FragTracking

SELECT @DBName
, ObjectName
, [Object_ID]
, Index_ID
, Partition_Number
, IndexType
, alloc_unit_type_desc
, avg_fragmentation_in_percent
, avg_fragment_size_in_pages
, avg_page_space_used_in_percent
, fragment_count
, page_count
, record_count
, forwarded_record_count
, ghost_record_count
, getdate()

FROM #_FragList

ORDER BY [Object_ID]
, Index_ID ASC;


-- Create & populate Temp table to drive defrag operations from.
CREATE TABLE #_DefragDriver
(
IdentID int IDENTITY(1,1)
, SchemaName sysname
, ObjectName sysname
, IndexName sysname
, IndexType varchar(60)
, avg_fragmentation_in_percent float
, page_count int
, record_count int
, ghost_record_count bigint
, partition_number int
);


SET @DynDefragDriver = '
USE [' + @DBName + ']

INSERT INTO #_DefragDriver

SELECT schema_name(so.schema_id)
, fl.[ObjectName]
, si.[name]
, fl.IndexType
, fl.avg_fragmentation_in_percent
, fl.page_count
, fl.record_count
, fl.ghost_record_count
, fl.partition_number

FROM #_FragList fl
, [' + @DBName + '].sys.indexes si
, [' + @DBName + '].sys.objects so

WHERE object_id(fl.ObjectName) = si.object_id
AND fl.index_id = si.index_id
AND object_id(fl.objectname) = so.object_id
AND si.is_disabled = 0
AND si.allow_page_locks = 1

GROUP BY so.schema_id
, fl.[ObjectName]
, fl.[object_id]
, fl.index_id
, si.[name]
, fl.IndexType
, fl.avg_fragmentation_in_percent
, fl.page_count
, fl.record_count
, fl.ghost_record_count
, fl.partition_number

ORDER BY fl.[object_id]
, fl.index_id ASC; '

EXEC (@DynDefragDriver);



-- Do the defrag.
DECLARE curDBFrag CURSOR
FOR

SELECT SchemaName
, ObjectName
, IndexName
, IndexType
, avg_fragmentation_in_percent
, page_count
, record_count
--, ghost_record_count
--, partition_number

FROM #_DefragDriver

ORDER BY IdentID ASC;

OPEN curDBFrag

FETCH NEXT FROM curDBFrag INTO @SchemaName, @ObjectName, @IndexName, @IndexType, @AvgFrag, @PageCount, @RecordCount --, @GhostRecordCnt, @Partition
WHILE (@@fetch_status <> -1)
BEGIN
IF (@@fetch_status <> -2)
BEGIN

-- ALTER INDEX operations:
SET @Message = 'Table: [' + @ObjectName + '] with record count: ' + CONVERT(varchar(15),@RecordCount) + ' and page count: ' + CONVERT(varchar(15),@PageCount) + '. Index: [' + @IndexName + '] of type: ' + @IndexType + ' is ' + CONVERT(varchar(5),@AvgFrag) + '% fragmented.';

SET @DynFragList = 'ALTER INDEX [' + @IndexName + '] ON [' + @DBName + '].[' + @SchemaName + '].[' + @ObjectName + '] REORGANIZE;'

EXEC (@DynFragList);

SET @Error = (SELECT @@ERROR)
IF @Error = 0
BEGIN
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'SUCCESS', CONVERT(varchar(15),@Error), @Message)
END;
ELSE
BEGIN
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'ERROR', CONVERT(varchar(15),@Error), @Message)
END;


-- UPDATE STATISTICS operations:
SET @Message = 'UPDATE STATISTICS [' + @SchemaName + '].[' + @ObjectName + '] [' + @Indexname + '];'

SET @DynUpdateStats = '
USE [' + @DBName + ']

UPDATE STATISTICS [' + @SchemaName + '].[' + @ObjectName + '] [' + @Indexname + ']; '

EXEC (@DynUpdateStats);

SET @Error = (SELECT @@ERROR)
IF @Error = 0
BEGIN
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'SUCCESS', CONVERT(varchar(15),@Error), @Message)
END;
ELSE
BEGIN
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'ERROR', CONVERT(varchar(15),@Error), @Message)
END;


-- Friendly WAITFOR operation:
WAITFOR DELAY '00:00:05.000'

END;
FETCH NEXT FROM curDBFrag INTO @SchemaName, @ObjectName, @IndexName, @IndexType, @AvgFrag, @PageCount, @RecordCount --, @GhostRecordCnt, @Partition
END;

CLOSE curDBFrag
DEALLOCATE curDBFrag;


-- Reset FULL recovery model.
IF @OrigRecoveryModel = 'FULL'
BEGIN
SET @DynDBAlter = 'ALTER DATABASE [' + @DBName + ']
SET RECOVERY FULL';

EXEC (@DynDBAlter);

SET @Error = (SELECT @@ERROR)
IF @Error = 0
BEGIN
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'SUCCESS', CONVERT(varchar(15),@Error), 'Successfully reset database [' + @DBName + '] back to FULL recovery model.')
END;
ELSE
BEGIN
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'ERROR', CONVERT(varchar(15),@Error), 'Failed to reset database [' + @DBName + '] back to FULL recovery model.')
END;
END;


-- Record complete message:
INSERT INTO Admin.dbo.Process_Log
VALUES (getdate(), @Process_Name, 'INFO', 0, '[COMPLETE] - usp_DB_Defrag @DBName = [' + @DBName + '], @Percent = ' + CONVERT(varchar(3),@Percentage) + '.');


-- Cleanup:
DROP TABLE #_FragList;
DROP TABLE #_DefragDriver;


-- Dependancies:
----
----USE [Admin]
----GO
---- DROP TABLE Admin.dbo.FragTracking
----CREATE TABLE FragTracking
----( TrackID int IDENTITY(1,1) -- PRIMARY KEY CLUSTERED
----, DBName sysname
----, ObjectName sysname
----, Object_ID int
----, Index_ID int
----, Partition_Number int
----, IndexType varchar(60)
----, alloc_unit_type_desc nvarchar(60)
----, avg_fragmentation_in_percent float
----, avg_fragment_size_in_pages float
----, avg_page_space_used_in_percent float
----, fragment_count bigint
----, page_count bigint
----, record_count bigint
----, forwarded_record_count bigint
----, ghost_record_count bigint
----, SnapDate datetime
----);
----
----USE [Admin]
----GO
---- DROP TABLE Admin.dbo.Process_Log
----CREATE TABLE [dbo].[Process_Log](
----[MessageID] [int] IDENTITY(1,1) NOT NULL,
----[Date] [datetime] NOT NULL,
----[Process_Name] [varchar](150) NULL,
----[Severity] [varchar](15) NULL,
----[ErrorCode] [int] NULL,
----[Message] [varchar](255) NULL,
---- CONSTRAINT [PK_Process_Log] PRIMARY KEY CLUSTERED
----(
----[Date] ASC,
----[MessageID] ASC
----)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [Admin_Data]
----) ON [Admin_Data]
----GO
GO

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I've tried

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go
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go
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[code]....

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Code:
--------------------------------------------------------------------------------

'INSERT INTO SaltInvWhOpen (StockCode, Warehouse, TrnMonth, TrnYear, OpenBalQty, OpenBalCost)SELECT StockCode, Warehouse, Month(GETDATE()) AS TrnMonth, YEAR(GETDATE()) AS TrnYear, OpenBalQty12, OpenBalQty12 * UnitCost AS Expr1FROM InvWarehouse
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In older versions I would have used a DTS package (It's been a long time and I'd have had to use a book to guide me through it), but as that is gone now, I am unsure where to even begin looking.

If someone could assist by giving me the current method, and dare I ask, walk me through it, the help would be much appreciated.

Thank you!

Julia

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After SQL Server Express 2012 is installed, is there a way to automate setting up a few options? I need to enable the option for both windows and sql server authentication. Can this be done with Powershell or other tool? This is a situation where the user has absolutely no computer skills and there is no one available in their office that can set the options manually. I thought some sort of script would be useful for this.

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