DB Engine :: Impact On Database If Stop A Long Running Rebuild Index Job?

Apr 26, 2015

We have 3 maintenance jobs configured in this particular DB instance:

Daily backup of system database - SubPlan1 (Check Database Integrity Task --> Rebuild Index Task-->Backup Database Task)Daily backup of user databases - Five subplans for each task : (Check DB integrity --> Rebuild Index -->Backup User Database, Backup Log -->Cleanup History)Weekly maintenance - SubPlan1 (Check Database integrity job (system+user DB) + rebuild index job (system+user DB) )

PROBLEM: I just noticed that the User DB Rebuild Index task has been running since the 03/04 and the Weekly maintenance plan - subplan1 since the 12/04.

Which job is "safe" to stop without impacting the database?

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DB Engine :: Run Rebuild Index Task Daily On Database

Apr 28, 2015

On our particular database server, we run the Rebuild Index Task (Using classic Maintenance Plan Designer) every night. Running the  script below, I saw that about 77 tables had an avg_fragmentation_in_percentage between 80% and 99% !!

SELECT OBJECT_NAME(ind.OBJECT_ID) AS TableName,
ind.name AS IndexName, indexstats.index_type_desc AS IndexType,
indexstats.avg_fragmentation_in_percent
FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL, NULL) indexstats
INNER JOIN sys.indexes ind
ON ind.object_id = indexstats.object_id
AND ind.index_id = indexstats.index_id
WHERE indexstats.avg_fragmentation_in_percent > 30--You can specify the percent as you want
ORDER BY indexstats.avg_fragmentation_in_percent DESC

I dont understand why these tables are highly fragmented after a daily index rebuild! Unless the users are doing heavy inserts/updates/deletes during the day.

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Feb 16, 2008



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Thanks,

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Apr 19, 2001

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I tried to test Rebuildm.exe on my local server
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2. Renamed master.mdf to master.mdf_old
3. Tried to start Sql (Does start of couse)
4. Run Rebuildm.exe ... and "Gonfigurating Sql server" message goes forever (I was waiting 1 1/2 hrs ... progress bar was running )

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Tnanks

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Hi,

I just want to know whether any advantage or disadvantage
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Plz do comment on this ASAP !!!!

Thanks in advance

Regards

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Thanks in advance

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Sep 1, 2006


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Is there a way to do this?

Thanks


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Jun 29, 2001

Running SQL 7.0 SP3 on P3 dual 800.

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I have no idea why it would take so long. Nothing changed, there were no new indexes created and none deleted.

Any ideas? I have to find out why. My boss wants an answer.

Thanks in advance.
Kelsey

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Thanks.

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Jan 11, 2006

I run dbcc dbreindex command and send the output to the text file. Is there any other way to check that indexes were in fact rebuild?

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Jan 15, 2008

Rebuild Index job for user db's is failing, one user db is a huge size 120 GB. The job scheduled to run every sunday 1 AM

I found the below error in log report

Rebuild Index Task (server name)
Rebuild index on Local server connection
Databases: All user databases
Object: Tables and views
Original amount of free space
Task start: 01/13/2008 1:26 AM.
Task end: 01/13/2008 2:38 AM.
Failed-1073548784) Executing the query "ALTER INDEX [Idx_CISCO_WLC_EVENTID] ON [dbo].[CISCO_WLC_200711262137] REBUILD WITH ( PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, SORT_IN_TEMPDB = OFF, ONLINE = OFF )
" failed with the following error: "Cannot find the object "dbo.CISCO_WLC_200711262137" because it does not exist or you do not have permissions.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.


Please let me know the solution?

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Dec 19, 2000

Hi all...

I have a table with over 60 million rows (approx 20GB) which has an indexed column. I have tried using DBC DBReindex to rebuild the index, but after kicking it off on a friday, it is still running the following wednesday. Since managers and other finicky types access this database, that's not acceptable (it slows down their reporting).

Is there a way to speed up the reindexing process? Perhaps by adding space to the tempdb (it's 500MB) or putting it in RAM temporarily? I haven't seen any articles that specifically state that TEMPDB is used during an index rebuild, but it seems logical that it would be.

Any suggestions to speed up the process would be most appreciated!

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May 1, 2008

If the index to be rebuilt is a clustered index, will all non-clustered indexes be rebuilt also by rebuilding only the clustered index.

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Oct 3, 2007

Hi,

After issuing an index rebuild on a primary key index (and updating statistics), the index still shows a scan density of 12.5%!

Any ideas on why the rebuild doesn't seem to do anything on the fragmentation levels?

I'm using sql 2005

Thanx

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Thanks and God Bless,
Thomas


ThomBeaux

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Sep 20, 2007



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Thanks!

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Nov 6, 2007



If I rebuild an index using:

ALTER INDEX IndexName ON dbo.TableName REBUILD WITH (ONLINE = ON)

Why would dm_db_index_physical_stats, show avg_fragmentation_in_percent as 50 percent?

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Jan 18, 2008

assuming that i don't have a problem that rebuilding the index take more CPU and locks the database resources.

if i run the rebuild index ,do i need to run the reorganized index as well? or the rebuild index fix whats the reorganizes Will fix if it will run?

THX

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Oct 12, 2015

I would like to completely understand the difference between index rebuild Maintenace plan and the customized script.Maintenance Plan rebuilds every single index.It will take the long time as it checks every index.If we use a custom script as a job, it will rebuild the index which has fragmentation  >30%.So that, the job will not take much time.

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Jul 25, 2007

I need to establish the storage requirements for a clustered index rebuild with SQL 05. The table is made up of the following columns



[ProductID] [int] NOT NULL,

[RegionID] [int] NOT NULL,

[TimeID] [int] NOT NULL,

[FactID] [int] NOT NULL,

[Value] [decimal](14, 4) NOT NULL



This is the clustered index :-



[RegionId] ASC,

[FactId] ASC,

[TimeId] ASC,

[ProductId] ASC



This is the result of a sp_spaceused on this particular table














name
rows
reserved
data
index_size
unused

Table
16910379278
868107368 KB
863579184 KB
3869848 KB
658336 KB



The database where this table is stored is in Simple recovery mode.



What i would really like to know is, what additional storage would i require to run the following rebuild index command.



Alter Index blah on table Rebuild



Thanks





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Msg 2511 / Rebuild Index Not Working

Jun 23, 1999

Fellow MSSQL DBA's, I am stuck. I am getting a Msg 2511 on a production database. The message reads - Table Corrupt: Keys in leaf page should be in ascending order. I have dropped the offending index and rebuilt both through the application and through ISQL. Neither method fixed the problem. DBCC CHECKDB shows no errors as long as the index does not exist. I have checked out the data and see no problems. Any ideas?
Thanks very much.

Tracy Hughes
thughes@neonsoft.com
office 303-805-5693

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Rebuild Index Task - Online Only?

Jun 19, 2008

Hi all,

In SQL Server 2005 EE I created a maintenance plan to rebuild indexes for a few large tables. I have selected five specific tables, and I'm using both "sort results in tempdb" as well as "keep index online while reindexing".

If I execute this plan for all these tables, are the indexes guaranteed to remain online? There are all different types of indexes on these tables. For example, the table "Contacts" has 8 indexes: 1 Clustered, 1 PK Unique Non-Clustered, 2 Unique Non-Clustered, and 4 Non-Unique Non-Clustered. I've heard that only certain types of indexes can remain online during a reindex (Clustered and Non-Unique Non-Clustered??).

Will SQL Server rebuild an index that isn't compatible with the online reindex mode, or will it choose to ignore it?

Thanks,

- Matt

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SQL 2005 JOB Contains Rebuild Index Failing

Dec 4, 2007

SQL Server 2005 version: 2153
I created a maintplan for system and user databases includes rebuild index, maint cleanup tasks.

Job is failing for user databases
It includes rebuild index task( online index enabled) and maintenance cleanup task, scheduled at every sunday 1 AM.


I receive following errors:

In eventvwr log

sql server scheduled job 'DBMP_RebuildIndex_User'
status: failed-Invoked on 2007-12-02 -1:00 Message: The job failed. The job was invoked by schedule 8 ('DBMP_RebuildIndex_User-Schedule).The last step to run was step1 ('DBMP_RebuildIndex_User')[/red]

In log report:

Failed:(-1073548784) Excuting the query "ALTER INDEX [XPKact_log] ON
[dbo].[act log] REBUILD WITH (PAD_INDEX=OFF,
STATISTICS_NORECOMPUTE=OFF,ALLOW_ROW_LOCKS=ON,ALLOW_PAGE_LOCKS=ON,SORT_IN_TEMPDB=OFF,ONLINE=ON)
"failed with the following error "Online index operation cannot be performed for index 'XPKact_log' because the index contains column 'action_desc' of data type text, ntext.image.varchar(max),varbinary(max) or xml. For non clusterd index the column could be an include column of the index. for clusterd index it could be any column of the table .Incase of drop_existing the cloumn could be part of new or old index. The operation must be performed offline". Possible failure reasons : Problems with the querey .'" Resultset" property not set correctly, parameters not set correctly, or connection not established correctly.

Please anyone help me on this?
I really appriciate

Thnks

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Jun 9, 2006

After rebuilding an index, it still shows as the same amount offragmentation. ANy ideas what's wrong?I'm determining which indexes to rebuild using the following query:SELECTOBJECT_NAME(i.object_id) AS TableName,i.name AS IndexName,ips.avg_fragmentation_in_percentFROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL,'DETAILED') ipsJOIN sys.indexes i ONi.object_id = ips.object_idAND i.index_id = ips.index_idWHERE ips.avg_fragmentation_in_percent > 10(I know 10% is not enough where a full rebuild is called for, justwanted to see my fragmentation)Then I rebuild w/:ALTER INDEX IX_CustomerName ON Customers REBUILDWhen I rerun the 1st query the same amount of fragmentation is shownas before the rebuild. I'd appreciate any help.

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Jun 19, 2006

Hi Folks,SQL Server 2000 SP3 on Windows 2000. I have a database on which I ranthe command :dbcc dbreindex ('tablename')gofor all tables in the database. Then I compared the dbcc showcontigwith all_index output from before and after the reindex and on thelargest table in the database I found this. First output is prior toreindex:Table: 'PlannedTransferArchive' (1975014117); index ID: 1, database ID:7TABLE level scan performed.- Pages Scanned................................: 184867- Extents Scanned..............................: 23203- Extent Switches..............................: 23324- Avg. Pages per Extent........................: 8.0- Scan Density [Best Count:Actual Count].......: 99.07% [23109:23325]- Logical Scan Fragmentation ..................: 11.13%- Extent Scan Fragmentation ...................: 35.46%- Avg. Bytes Free per Page.....................: 60.0- Avg. Page Density (full).....................: 99.26%Second output is from after the reindex:DBCC SHOWCONTIG scanning 'PlannedTransferArchive' table...Table: 'PlannedTransferArchive' (1975014117); index ID: 1, database ID:8TABLE level scan performed.- Pages Scanned................................: 303177- Extents Scanned..............................: 37964- Extent Switches..............................: 42579- Avg. Pages per Extent........................: 8.0- Scan Density [Best Count:Actual Count].......: 89.00% [37898:42580]- Logical Scan Fragmentation ..................: 43.19%- Extent Scan Fragmentation ...................: 24.78%- Avg. Bytes Free per Page.....................: 75.1- Avg. Page Density (full).....................: 99.07%Following are my concerns:The following numbers are all higher after reindex than before reindex:pages scanned, extent switches, logical scan fragmentation, avg bytesfree per page, avg page density.scan density is lower after reindex than before reindexSeems to me that the numbers that are higher after reindex should belower and numbers that are lower after reindex should be higher? Ididn't specify the fill factor in the dbcc reindex command so it shouldhave used the default fill factor. The fill factor has never beenchanged on this machine.Am I missing something?Thanks,Raziq.*** Sent via Developersdex http://www.developersdex.com ***

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