Maintenance Plans: Online Rebuilding Of Indexes...
Apr 24, 2006
I'm using SQL Server 2005 SP1 Standard.
On the Rebuild Index Task there is a checkbox at the bottom that says 'Keep index online while reindexing'.
Great I thought, I'll check that.
Later, when I tested the job, I got this error:
'Online index operations can only be performed in Enterprise edition of SQL Server.'
Why have that checkbox available to check, if I'm running a version that doesn't allow it? Where's the bug?
Thanks
Ed
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Apr 30, 2008
We are using SQL 1005 Standard Edt, so online Rebuild index is not available. Any way to figure out how much time will it take to rebuild index on given size of database so i can make sure i set schedule for rebuilding index when it is okay not to answer DB traffice during that time.
Thanks,
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Jun 3, 2014
I was under impression that rebuilding index online largely means that the index will remain available for use during rebuild and my procs and query will be able to use it during rebuild. Also my understanding was that table will be locked very briefly while the schema change will be completing.But when I was rebuilding the clustered index online on a large table with some 3 million records, the table got locked and I was not able even to read the data from it for some 5 minutes. Then I cancelled the operation as it was production server and it was one of our main transaction table.
Is rebuilding index online supposed to work this way? The table has no other index.The parameteres I used are:
REBUILD WITH (PAD_INDEX = ON, SORT_IN_TEMPDB = ON, ONLINE = ON, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 95)
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Jan 14, 2002
Hi!
I was wondering what kind of locks (if any) SQL Server 2000 holds on tables while rebuilding clustered and non-clustered indexes.
Thanks!
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Sep 20, 2000
Do anyone know how to rebuild indexes on the maintenance plan??
I would like to automate rebuilding my indexes on the database about once every month.
I know you can manually do this by using DBCC DBREINDEX. This is to long and tedious.
Thanks in advance!
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Dec 2, 1999
All,
I have scheduled dbreindex command to run on an clustered indexed on a very large table over night, so far this as failed to complete successfully. I think it may have something to do with the amount of space available in the device; the table is approx 238mb in size and the available disk space left in the device is 200 mb.
Does anyone know how much space is required to reindex a table/index this size and if it is required on the same device as the table or in tempdb.
Or even better, if anyone can explain the inter-workings of how the dbreindex command reorgs the table.
Thanks Mathew
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Feb 23, 2004
Hello all,
I need to diagnose a problem, this Sunday a regular Database Maintenance plan which is supposed to rebuild indexes took exactly 6 hours and 32 minutes. Now that’s a hell lot of time and during all that process users were denied access to those tables. This is a production server. I want to know what caused that plan to run for so long and how can I avoid this to happen again plus if it ever happens again how can I make sure that atleast it doesn’t lock tables. I know DBCC INDEXDEFRAG doesn’t lock tables but how can I make Database Maintenance plan to run DBCC INDEXDEFRAG instead of DBCC DBREINDEX but more importantly why it took 6 hours.
Thanks all
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Jan 14, 2002
(Oops, sorry I posted this on the SQL 7 discussion earlier).
----------------------
I was wondering what kind of locks (if any) SQL Server 2000 holds on tables while rebuilding clustered and non-clustered indexes.
Thanks!
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Feb 23, 2004
Hello all,
I need to diagnose a problem, this Sunday a regular Database Maintenance plan which is supposed to rebuild indexes took exactly 6 hours and 32 minutes. Now that’s a hell lot of time and during all that process users were denied access to those tables. This is a production server. I want to know what caused that plan to run for so long and how can I avoid this to happen again plus if it ever happens again how can I make sure that atleast it doesn’t lock tables. I know DBCC INDEXDEFRAG doesn’t lock tables but how can I make Database Maintenance plan to run DBCC INDEXDEFRAG instead of DBCC DBREINDEX but more importantly why it took 6 hours.
Thanks all
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Jun 13, 2008
Hello,
I'm new to rebuilding and reorg indexes. I used the standard report feature in 2005 to look up Index Physical Statistics on one db. I found recommendation to rebuild a few indexes that contain a number of fragments. I created a maint. task, I know maint. tasks are not a cure-all but so far I am just testing the waters. I created two tasks, one to rebuild and another to reorg. After I ran the job, I looked at the report and it still showed recommendation to rebuild the indexes. What is a better solution for my case?
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Feb 25, 2007
Hi,
I have recenlty had to rebuild the indexes for the entire database as they were running a little slow. It prompted me to further investigate the health of the indexes on the database. I have been using the sys.dm_db_index_physical_stats view to do this. I had a query with regards to the avg_fragmentation_in_percent column that the view displays. I have rebuilt all the indexes and for some of the indexes the fragmentation value remains the same. The following is an example of what is returned by the sys.dm_db_index_physical_stats for a single index:
Table, IndexName, avg_fragmentation_in_percent, avg_page_space_used_in_percent
Links, PK_Links, 77.7777777777778, 97.1501606127996
Links, PK_Links, 0, 1.42080553496417
I do not understand why this index the fragmentation is so high even though I have rebuilt it. It is not just this index it occurs for other indexes as well. What could be some of the factors that are causing this to occur?
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Jul 20, 2005
HiI got the advice to rebuild the indexes on the databases once a year.Espesially if the database have grown much. The question is: How do Ido that?If I try to run the indexscript wich was run when the databases werecreated, I only get the message that the indexes already exists.Are there a command to automatically rebuild the indexesautomatically?Roger
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Sep 14, 2006
Aight, so I added a full text catalog and a full text index for one specific column and table in my database.Now the issue is, whenever I rebuild it, it locks the full text index forever, making it unsuable. Now, there are only 30,000 records i need to search, so it isn't like there is this massive amount of data. What am I doing wrong to where it is locking the index and disallowing me to use the stored procedure that does the searching?
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Mar 19, 2015
Is it possible to reclaim space after rebuilding indexes(shrinking is not an option).
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Jul 23, 2015
Currently we are facing some performance issue while accessing the archive data from the archive tables. the archive table is hugh and it contains around 100,000,000 records and this archive table is being used in few reports and in our commission cycles too. since we are facing performance issues we are rebuilding index once in a week on all the indexes on this archive table.
We have 1 clustered index and 5 non clustered indexes, every time when we rebuild all these indexes on this table it is taking more time, more often rebuilding the clustered index itself is taking approx. 1hr which is consuming more time. wanted to know is there any useful to rebuild clustered indexes or not, if yes then what would be the better way. if not then do we need to rebuild only non clustered indexes.
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Sep 26, 2007
Hi all,
When I am rebuilding the indexes on the tables, I am getting lot of free space( unallocated) on the database.
Before rebuilding the indexes , the size of the database = 385 Gb
After rebuilding the indexes, the size jumps to = 572 Gb (i.e.) This means 187 Gb of unallocated space .
The Command use to rebuild indexes is:
USE [databasename]
GO
ALTER INDEX [PK_index] ON [dbo].[tablename] REBUILD WITH
( PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, SORT_IN_TEMPDB = ON, ONLINE = OFF )
GO
So, every time we rebuild indexes, we have to shrink the database
(or)
Is there anything else ,I should be doing.
Thanks.
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Jul 7, 2015
I have come across a database system which isn't designed to work optimally. It is fairly large (~400GB) and performance of loading and querying is degrading (improper data types, fragmented indexes, non unique clustering key and other problems). So, I have quite a task in front of me, but I am up for the challenge. I figure this is not a unique situation, many of us would have come across this before. I have done this before too, but only for smaller databases, some of the operations here I expect to take a couple of hours or more to complete (depending on load/infrastructure speed etc, I know).
My plan is thus:
+ Take a full backup of the database
+ Set the recovery model of the DB to simple
+ Drop non clustered indexes
+ Drop clustered indexes
+ Remove PKs (wrong data types, too large!)
+ Narrow data types (add new column, update column in batches to old value, rename new column to old column)
+ Add PKs, which will create clustered indexes automatically based on PK ID
+ Create non clustered indexes
+ Run a SHRINKDB (normal operations I would never do this, but this is a special case, ensure log file is truncated to a logical size especially after all those table modifications...)
+ Set the recovery model of the DB to Full
+ Ensure everything works OK or better
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Feb 25, 2008
I am trying to automate my index rebuild and reorg based off of the percentage of fragmentation level. The first time you run it you have to change the alter proce Sp_NCRNRecreate then change it to Alter proc. It seems to run okay no errors but it doesn't seem to actually rebuild them. Please take a look and let me know if you see a program error somewhere. I would like create this sp to run automatically
use master
GO
Alter PROC sp_NCR_RecreateIndexes @AutoRun bit=0 AS
BEGIN
DECLARE @DatabaseName varchar(128), @SchemaName varchar(128), @objectName varchar(128), @IndexName varchar(128), @PercentFragmented float, @command varchar(max)
SELECT db_name(s.database_id) as DatabaseName, schema_name(o.schema_id) as SchemaName, o.name as TableName, i.name as IndexName, s.avg_fragmentation_in_percent AS PercentFragmented
INTO #IndexesToRebuild
FROM sys.dm_db_index_physical_stats (db_id(), Null, NULL, NULL, NULL) s
INNER JOIN sys.objects o ON s.object_id=o.object_id
INNER JOIN sys.indexes i ON s.object_id=i.object_id AND s.index_id=i.index_id
WHERE s.avg_fragmentation_in_percent > 10.0 AND s.index_id > 0
SELECT * FROM #IndexesToRebuild
DECLARE IndexCursor CURSOR FOR SELECT DatabaseName, SchemaName, TableName, IndexName, PercentFragmented FROM #IndexesToRebuild
OPEN IndexCursor
FETCH IndexCursor INTO @DatabaseName, @SchemaName, @objectName, @IndexName, @PercentFragmented
WHILE @@FETCH_STATUS=0
BEGIN
SELECT @command = 'ALTER INDEX ' + @indexname +' ON ' + @databaseName + '.' + @schemaname + '.' + @objectName + CASE WHEN @PercentFragmented<30 THEN ' REORGANIZE' ELSE ' REBUILD' END;
print @command
IF @AutoRun=1
EXEC(@command)
FETCH IndexCursor INTO @DatabaseName, @SchemaName, @objectName, @IndexName, @PercentFragmented
END
--SELECT * FROM #IndexStats
END
GO
EXEC sys.sp_MS_marksystemobject sp_NCR_RecreateIndexes
GO
EXEC otis..sp_NCR_RecreateIndexes
EXEC ncrCommon..sp_NCR_RecreateIndexes
GO
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Aug 31, 2015
If I'm doing data compression(page level) does it rebuild indexes too? and how about stats, does it update stats too?
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Jan 17, 2007
Hi,
We have a client that has a large (5Gb) database replicated to 13 subscribers, the publisher is Sql 2005, the subscribers are Sql Express. The publication has as few filtered articles too. I have found that after several months of continuous running Replication Monitor is taking a long time to report history on each subscriber.
Do people tend to rebuild the indexes on the system merge replication tables on production servers, or should the standard replication jobs take care of this?
Thanks for your help
Graham
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Feb 20, 2003
SQL7: I have added a Maintenance Plan to backup to 4mm dat tape the master and msdb SQL databases as well as another database relative to our application called WISE. This works fine; however, it appears to always append to the media as opposed to overwriting (preferred). Any help would be appreciated.....
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Aug 22, 2005
Hi,
I am going to set up maintenance plans on all our SQL servers (7.0 and 2000). I have found several 'tutorials' on how to do this, but no one is describing the options in detail. Can you guys/gals please help me out? We have alot of small databases and some medium (1-2GB).
Thanks//Stefan
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Feb 15, 2005
We have Veritas' Backupexec running in our Enterprise and the Veritas Install actually installs MS SQL Server MSDN on each Server in the Enterprise.
It looks like it also sets up a default Maintenance plan within each of the MSDN Instances.
I guess my question is.. Can I manage the Maintenance Plans on these MSDN Instances via the SQL Server EM GUI from my desktop?? Seems like when I look at the Maintenance plans alot of the options are greyed out or not available. What I am trying to do is modify one of the maintenance plans to have the backups deleted after one week (One of the Instances has been running a complete backup on the Backupexec Databases for a year and there are a years worth of backups on the Server) but the option to "remove files older than" is 'greyed out' ??????
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Feb 20, 2008
Eh uhhhh where did the old '-DelBkUps 7DAYS' (delete files older than 7 Days) option go?
Is this a future product enhancement?
I fee like such a dirty noob.
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Dec 1, 2007
Does anyone get any issues creating "Backup" jobs as a Maintenance Plan when specifying the backup location as a UNC path (e.g. "\backup_bladeBACKUPS")?
For some reason, if i try using the UNC path for a 1-time backup, it works, but when I am trying to put it into a scheduled job, it does not 'seem' to perform the Backup step.
Help please...
seethem
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Feb 28, 2007
Does anyone know if Sql Server 2005 Express SP2 support scheduled backups and maintenance plans?
Looking at http://msdn2.microsoft.com/en-us/library/bb283536.aspx , it appears to...
Thanks.
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Mar 5, 2007
I created several Maint.Plans before installing SP2. Now I need to modify them and I get the following error. I cannot even Create new ones, because of the Enumerate error. Please advice if this error is due to the same issues mentioned on this blog.
When replying please cc me at Camilo.Torres@bellsouth.com
Thanks
TITLE: Microsoft SQL Server Management Studio
------------------------------
Enumerate target servers failed for Job 'Daily Maintenance Plan 1'. (Microsoft.SqlServer.Smo)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=9.00.3042.00&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Enumerate+target+servers+Job&LinkId=20476
------------------------------
ADDITIONAL INFORMATION:
Failed to retrieve data for this request. (Microsoft.SqlServer.SmoEnum)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&LinkId=20476
------------------------------
An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)
------------------------------
String or binary data would be truncated. (Microsoft SQL Server, Error: 8152)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=09.00.3042&EvtSrc=MSSQLServer&EvtID=8152&LinkId=20476
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Sep 18, 2000
Is there a way to find out what Trans-SQL is being executed by a Maintenance Plan. More specifically, if I select Attempt to Repair on the Check Database Integrity screen, I know it is executing DBCC CheckDB, but which repair option is it using (repair_fast, repair_allow_data_loss, repair_rebuild)?
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Jun 8, 2000
I defined a maintenance plan to do a backup, scheduled it for midnight, but no job ever ran. Is there some other step to do?
thanks!
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Feb 18, 2000
A year ago one of our SQL Server 6.5 servers was upgraded
to SQL Server 7.0 sp1. My compatibility level still shows
6.5, however. The SQLAgent has been using the 'localsystem'
account up until earlier this week. I changed the login
to be a domain account with System Administrator
permissions and removed the SA permissions from the
BuiltinAdministrator group. (My ultimate goal is to limit
the access NT Administrators have within my SQL databases.) All of my scheduled jobs run without error except the maintenance plans. (All
jobs have an owner of sa.)
The errors that I receive are permission errors-not being able
to get into tables on the MSDB database. However, if I open
Query Analyzer with the SQLAgent domain account and perform
a select on one of the tables in MSDB, it is successful. If I give
the BuiltinAdministrator account the SA permissions again
while still keeping the SQLAgent using the new domain account,
the maintenance jobs succeed.
Is this an upgrade problem since I do have other SQL 7.0 servers
that don't have this problem? How can I correct this?
Thank you!
Toni
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Sep 15, 1999
Hi, I'm new to SQL 7 (and fairly new to SQL Server), can anyone help with these basic questions on database maintenance plans generated by the wizard:
(1) Scheduling - can SQLServer handle say a REORG running at the same time as a backup against the same database? This should never happen, but what will happen if say a backup is due to start before a REORG has finished? To try & simulate this 'problem' I've run REORGs and backups at the same time & have yet to encounter errors I presume SQL locking handles this OK.
(2) Database integrity checks - (a) any comments on the wisdom of checking 'repair any minor problems'? Anyone had any problems with this? (b) While integrity checks are running do they take enforce a consistent view of the data? (I think this is probably the case as my reading of books online indicates that DBCC takes shared locks for the duration)
(3) Backups - does the 'VERIFY INTEGRITY' option have any impact on the live database? (My reading of RESTORE VERIFYONLY indicates it doesn't)
Thanks....
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Mar 18, 2003
What is the recommended schedule for SQL Server maintenance plans that perform database integrity checks and optimizations?
Also, more specifically, how often should we be re-building our indexes?
Thanks for your help.
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Nov 6, 2003
Is there a way to script out maintenance plans (and their corresponding jobs) from a server ?
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