Reindexing Of Database Tables

May 27, 2008

hi
i have reindex of the tables
is it really improve performance that making table reindexing ?

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ReIndexing All Tables In A Database

Sep 5, 2006



I need to reindex all tables in my database and would like to do this without using a Cursor. What is the simplest way to achieve this.

Cheers

Nat

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Reindexing Tables

Sep 17, 2001

I've just recently tried to perform a scheduled reindexing job with the following command:

EXEC sp_MSforeachtable @command1="print '?' DBCC DBREINDEX ('?')"

Unfortunately, this command has only finished once of the five or six times I've tried to run it. The times it has failed, it deadlocks behind what seems to be a succession of other transactions. How can I make sure this command finishes?

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Reindexing Tables

Dec 27, 2002

Hello Everyone,

I need to rebuild all indexes in one table, is there any command that will do automatically instead of deleting and recreating them all?

Any help will be appreciated.

Thanks

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Reindexing Tables On A Databse That Is 36GB

Nov 3, 2005

Hello,

I'm looking for the query command that will go out to all the user Tables and will tell me what Indexes need to be reindexed.

We are having a problem with some of the tables and we don't know when our tables need to be reindexed other than when operations are stopped for our company.

Thanks,

Ron

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Reindexing A Database...

Oct 18, 2007


All,

I've got a medium sized database in a mirror configuration with witness. The database size is about 300gb and I would to reindex all of the tables in the database. My process would go something like this:

1) Backup principal
2) Break the mirror
3) Set the principal database to simple recovery mode
4) Perform the reindexing
5) Backup the principal and transfer that backup to the mirror

6) Restore the backup
7) Re-establish the mirror


Does anyone see any issues with the process itself?

Regards,

Ian

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Database Reindexing And Mirroring

Apr 25, 2008

Hi,

We have scheduled a job for DB Reindexing (Maitinance Plan) for a OLTP database on sunday.

We have used mirroring for automatic failover with a witness server now the DR Reindexing job fails after 30 mins without any error.

Please let me know why Database reindexing gets failed.

Regards
Sufian

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Reindexing

Apr 15, 2002

Attempt to fetch logical page (1:166354) in database 'pm_pmc_prod' belongs to object '837120', not to object 'ng_visit'.

I got his error while importing data into the error, when i ran dbcc checkdb it gave me Msg 8928,8942,8976 etct witl serverity level 16...

is it possible to fix this curropt tables?

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REINDEXING IN VER 7

Jun 22, 1999

We load tables from text files for inquiries.
My procedure is to truncate the table
Use DTS to move the text file into the table
do the command DBCC DBREINDEX (TABLE,'')

Am I wasting my time?
Does SQL 7 rebuild the indicis as it loads the data from the text file?

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How And When Reindexing A Db?

Aug 16, 2006

Hello guys,

Two things:

1) Could somebody explain me how to reindex all tables in my db?

2) How do I know when I should reindex my db?

Thank you very much for any help!

Regards,
Fabian

my favorit hoster is ASPnix : www.aspnix.com !

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Table Reindexing

Nov 15, 2007

Hi All,
is it really improve performance that making table reindexing?

what i mean to say is i've one script, which will automatically drops all the indexes in a database, and reconstruct them with the same name.


is it really worth doing that?.....


thankyou very much

Vinod
Even you learn 1%, Learn it with 100% confidence.

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Refragmentation And Reindexing

Dec 27, 2007

Hi experts,
For defragmenation and reindexing they are using the below cursor, and now they have asked me to remove the cursor and schedule the job accordingly to do the same functionality, so what will be the other way we can do without cursor? can you plase let me know the solution?


DECLARE @Database VARCHAR(255)
DECLARE @Table VARCHAR(255)
DECLARE @cmd NVARCHAR(500)
DECLARE @fillfactor INT

SET @fillfactor = 90

DECLARE DatabaseCursor CURSOR FOR
SELECT database_name FROM dbadmin.dbo.tdbstatus WHERE status='y'
AND database_name NOT IN ('master','model','msdb','tempdb')
ORDER BY 1

OPEN DatabaseCursor

FETCH NEXT FROM DatabaseCursor INTO @Database
WHILE @@FETCH_STATUS = 0
BEGIN
SET @cmd = 'DECLARE TableCursor CURSOR FOR SELECT table_catalog + ''.'' + table_schema + ''.'' + table_name as tableName
FROM ' + @Database + '.INFORMATION_SCHEMA.TABLES WHERE table_type = ''BASE TABLE'''

-- create table cursor
EXEC (@cmd)
OPEN TableCursor

FETCH NEXT FROM TableCursor INTO @Table
WHILE @@FETCH_STATUS = 0
BEGIN




SET @cmd = 'ALTER INDEX ALL ON ' + @Table + ' REBUILD WITH (FILLFACTOR = ' + CONVERT(VARCHAR(3),@fillfactor) + ')'
EXEC (@cmd)

FETCH NEXT FROM TableCursor INTO @Table
END

CLOSE TableCursor
DEALLOCATE TableCursor

FETCH NEXT FROM DatabaseCursor INTO @Database
END
CLOSE DatabaseCursor
DEALLOCATE DatabaseCursor


Your help will be appreciated.

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Maintenance Plan, Reindexing

Mar 24, 2005

In the Enterprise Manager of SQL Server 2000 I have set up a maintenance plan which rebuilds my indexes. I've stuided the documentation, and from what I've learned what happens behind the curtain is that several DBCC REINDEX commands are being issued.
Question:
If I have 20 tables and 40 indexes: Will SQL Server do the maintance plan in 1 single transaction, or will it divide the it up to eg. 20 or 40 transactions?

-h

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Reindexing Vs Update Statistics

Nov 22, 2004

Hi

We are upgrading from sql 7 to 2000.During the upgrade process do we have to do a reindexing of all tables or will update statistics take care of that.

Or do we have to do both?
What is the difference between reindexing and update statistics.

Thanks

Madhukar Gole

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Reindexing And Transaction Logs

Dec 14, 2004

Hi All,

Just after some feedback on a scenario where we have full logging setup on one of the databases, and the transaction logs are backed up every 60min. At 0000-0100 the log jumps from being a few thousand k up to over 1.7gb.
I did some profiling for this time, and it appears that this jump is related to the reindexing of the indexes on the database.

Is this normal for the log file to jump in size so much? Or is this an indication of some other issue (potentially with the indexes)?

Is there any way that the reindexing can be excluded from the log files or is this a necessity?

Thanks in advance for your help.

Cheers
Troy

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Third Party Reindexing Utilities

Jul 23, 2005

Folks,I work on a system which is growing rapidly, with the number oftransactions we process growing on a daily basis. While this is goodnews or the business, maintenance is starting to become an issue as thedatabase is the backend for a website which cannot be down for alengthy period of time.While I do defrag the indexes, periodically the indexes do need to berebuilt. When this happens, the process locks pages and transactionsstart getting bounced out.Are their any third party utilities which will rebuild an indexwithout this locking occuring? Any help in pointing me in the rightdirection would be appreciated.

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Effect On Snapshots While Reindexing

Apr 30, 2007

Does someone know if doing a reindex on a clustered or non-clustered index cause the snapshot file to grow? In other words, is the data that makes up the snapshot copied from the source to the snapshot database? If a normal reindex is done on the underlying database, will it block users from acessing the snapshot? Any help would be appreciated.

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Reindexing On A Mirror Environment

Oct 18, 2007

All,

I've got a medium sized database in a mirror configuration with witness. The database size is about 300gb and I would to reindex all of the tables in the database. My process would go something like this:

1) Backup principal
2) Break the mirror
3) Set the principal database to simple recovery mode
4) Perform the reindexing
5) Backup the principal and transfer that backup to the mirror

6) Restore the backup
7) Re-establish the mirror


Does anyone see any issues with the process itself?

Regards,

Ian

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Extent Fragmentation High Just After Reindexing

Jul 18, 2007

Hello. When reviewing the DBCC SHOWCONTIG immediately after reindexing all indexes on a database, I see the ExtentFragmentation has values like 50 to 70%... These are SQL 2005 tables with clustered PK's, no large varchars/blobs, and at least 100 pages in the index... The numbers related to PAGE fragmentation are ok after reindexing, but not the EXTENT fragmentation numbers.



I noticed the drive is in need of being defragged at the disk level. Is that a reason why reindexing doesn't fix the Extent frag numbers?? ANy other ideas on this? I can try defragging the DISK over the weekend, bringing the database offline then, but any other thougths on why the Extents show these high %'s? Is there any command to reset them and maybe that isn't happening? Like must I do update usage to get valid Extent frag #'s??



If there were MANY autogrows on the files, is that a different level of fragmentation? and how could all those small pieces of files be pulled back together? Thanks, Bruce

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Solution!-Create Access/Jet DB, Tables, Delete Tables, Compact Database

Feb 5, 2007

From Newbie to Newbie,



Add reference to:

'Microsoft ActiveX Data Objects 2.8 Library

'Microsoft ADO Ext.2.8 for DDL and Security

'Microsoft Jet and Replication Objects 2.6 Library

--------------------------------------------------------

Imports System.IO

Imports System.IO.File





Code Snippet

'BACKUP DATABASE

Public Shared Sub Restart()

End Sub



'You have to have a BackUps folder included into your release!

Private Sub BackUpDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BackUpDB.Click
Dim addtimestamp As String
Dim f As String
Dim z As String
Dim g As String
Dim Dialogbox1 As New Backupinfo


addtimestamp = Format(Now(), "_MMddyy_HHmm")
z = "C:Program FilesVSoftAppMissNewAppDB.mdb"
g = addtimestamp + ".mdb"


'Add timestamp and .mdb endging to NewAppDB
f = "C:Program FilesVSoftAppMissBackUpsNewAppDB" & g & ""



Try

File.Copy(z, f)

Catch ex As System.Exception

System.Windows.Forms.MessageBox.Show(ex.Message)

End Try



MsgBox("Backup completed succesfully.")
If Dialogbox1.ShowDialog = Windows.Forms.DialogResult.OK Then
End If
End Sub






Code Snippet

'RESTORE DATABASE

Private Sub RestoreDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

RestoreDB.Click
Dim Filename As String
Dim Restart1 As New RestoreRestart
Dim overwrite As Boolean
overwrite = True
Dim xi As String


With OpenFileDialog1
.Filter = "Database files (*.mdb)|*.mdb|" & "All files|*.*"
If .ShowDialog() = Windows.Forms.DialogResult.OK Then
Filename = .FileName



'Strips restored database from the timestamp
xi = "C:Program FilesVSoftAppMissNewAppDB.mdb"
File.Copy(Filename, xi, overwrite)
End If
End With


'Notify user
MsgBox("Data restored successfully")


Restart()
If Restart1.ShowDialog = Windows.Forms.DialogResult.OK Then
Application.Restart()
End If
End Sub








Code Snippet

'CREATE NEW DATABASE

Private Sub CreateNewDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

CreateNewDB.Click
Dim L As New DatabaseEraseWarning
Dim Cat As ADOX.Catalog
Cat = New ADOX.Catalog
Dim Restart2 As New NewDBRestart
If File.Exists("C:Program FilesVSoftAppMissNewAppDB.mdb") Then
If L.ShowDialog() = Windows.Forms.DialogResult.Cancel Then
Exit Sub
Else
File.Delete("C:Program FilesVSoftAppMissNewAppDB.mdb")
End If
End If
Cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Program FilesVSoftAppMissNewAppDB.mdb;

Jet OLEDB:Engine Type=5")

Dim Cn As ADODB.Connection
'Dim Cat As ADOX.Catalog
Dim Tablename As ADOX.Table
'Taylor these according to your need - add so many column as you need.
Dim col As ADOX.Column = New ADOX.Column
Dim col1 As ADOX.Column = New ADOX.Column
Dim col2 As ADOX.Column = New ADOX.Column
Dim col3 As ADOX.Column = New ADOX.Column
Dim col4 As ADOX.Column = New ADOX.Column
Dim col5 As ADOX.Column = New ADOX.Column
Dim col6 As ADOX.Column = New ADOX.Column
Dim col7 As ADOX.Column = New ADOX.Column
Dim col8 As ADOX.Column = New ADOX.Column

Cn = New ADODB.Connection
Cat = New ADOX.Catalog
Tablename = New ADOX.Table



'Open the connection
Cn.Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Program FilesVSoftAppMissNewAppDB.mdb;Jet

OLEDB:Engine Type=5")


'Open the Catalog
Cat.ActiveConnection = Cn



'Create the table (you can name it anyway you want)
Tablename.Name = "Table1"


'Taylor according to your need - add so many column as you need. Watch for the DataType!
col.Name = "ID"
col.Type = ADOX.DataTypeEnum.adInteger
col1.Name = "MA"
col1.Type = ADOX.DataTypeEnum.adInteger
col1.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col2.Name = "FName"
col2.Type = ADOX.DataTypeEnum.adVarWChar
col2.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col3.Name = "LName"
col3.Type = ADOX.DataTypeEnum.adVarWChar
col3.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col4.Name = "DOB"
col4.Type = ADOX.DataTypeEnum.adDate
col4.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col5.Name = "Gender"
col5.Type = ADOX.DataTypeEnum.adVarWChar
col5.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col6.Name = "Phone1"
col6.Type = ADOX.DataTypeEnum.adVarWChar
col6.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col7.Name = "Phone2"
col7.Type = ADOX.DataTypeEnum.adVarWChar
col7.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col8.Name = "Notes"
col8.Type = ADOX.DataTypeEnum.adVarWChar
col8.Attributes = ADOX.ColumnAttributesEnum.adColNullable



Tablename.Keys.Append("PrimaryKey", ADOX.KeyTypeEnum.adKeyPrimary, "ID")


'You have to append all your columns you have created above
Tablename.Columns.Append(col)
Tablename.Columns.Append(col1)
Tablename.Columns.Append(col2)
Tablename.Columns.Append(col3)
Tablename.Columns.Append(col4)
Tablename.Columns.Append(col5)
Tablename.Columns.Append(col6)
Tablename.Columns.Append(col7)
Tablename.Columns.Append(col8)



'Append the newly created table to the Tables Collection
Cat.Tables.Append(Tablename)



'User notification )
MsgBox("A new empty database was created successfully")


'clean up objects
Tablename = Nothing
Cat = Nothing
Cn.Close()
Cn = Nothing


'Restart application
If Restart2.ShowDialog() = Windows.Forms.DialogResult.OK Then
Application.Restart()
End If

End Sub








Code Snippet



'COMPACT DATABASE

Private Sub CompactDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

CompactDB.Click
Dim JRO As JRO.JetEngine
JRO = New JRO.JetEngine


'The first source is the original, the second is the compacted database under an other name.
JRO.CompactDatabase("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Program

FilesVSoftAppMissNewAppDB.mdb; Jet OLEDB:Engine Type=5", "Provider=Microsoft.Jet.OLEDB.4.0;

Data Source=C:Program FilesVSoftAppMissNewAppDBComp.mdb; JetOLEDB:Engine Type=5")


'Original (not compacted database is deleted)
File.Delete("C:Program FilesVSoftAppMissNewAppDB.mdb")


'Compacted database is renamed to the original databas's neme.
Rename("C:Program FilesVSoftAppMissNewAppDBComp.mdb", "C:Program FilesVSoftAppMissNewAppDB.mdb")


'User notification
MsgBox("The database was compacted successfully")

End Sub

End Class

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Can I Export Tables So That Existing Tables In Destination Database Will Be Modified?

Jul 20, 2005

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Mar 2, 2008

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Dec 19, 2003

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5) If money were no object, I would live . . .
Prefer not to say
On a tropical island
In a New York penthouse
In an English castle
On a Texas ranch
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In a mountain retreat (Selected)
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None of the above


1 --->
2 --->
3 --->
4 --->
5) --->6 This is the question we are looking at.
6 --->

How should I create the database table for the above example.

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Sep 9, 2015

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I have performed the following tasks **

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3. Import Data. This is the main problem. I was trying to create a dynamic connection string with variables as suggested in several forums but I finally came to know that this cannot be done if the table structures are different as the metadata cannot be refreshed at runtime.

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What is the best method to do this? My DBA does not like “Transfer SQL Objects Task” or “transfer Database Task”. I would like to create this as a dynamic process.

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Apr 15, 2008



Hi,

In a stored procedure is there a way of accessing a table presend in another database.

Please provide pointers on how i can do this.

Thanks,
Raj

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Aug 27, 2007

hi,
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thanks..

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May 2, 2008



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