For more information about managing indexes, see Reorganize and Rebuild Indexes. For higher fragmentation Rebuild is preferred. インデックスの断片化の状態がわかったら、それによってインデックス (index) を再構成 (Reorganize)するか、または再構築 (Rebuild) するか決定します。. Example #. Reorganize Index Task Forum – Learn more on SQLServerCentral. Obviously this isn't the same as index reorganize, so I'm still trying to think what does reorganize file technically mean. [myTable] REORGANIZE WITH ( LOB_COMPACTION = ON ) I have the above query running for 16 days (still running), the table is a dummy table used for benchmark tests, it has over 10 Billion rows. Note: You can select “Reorganize All” to reorganize all the indexes in the table. Hallengren website has an option to reorganize indexes say with 5% Fragmentation, and rebuild for 30% Fragmentation. Reorganizing the indexes will take less time, and less effort from the SQL server thus they can be done in a weeknight type of instances. The syntax for rebuilding indexes is very simple, we just add the "WITH ONLINE=ON" clause to the ALTER INDEX command. ". The script will do a reorg if fragmentation goes over 5 %. I am getting confused with choosing Index Reorganize/Rebuilding of indexes based on avg_fragmentation_in_percent returned by sys. -Search all indexes of a table that have 5% or more of fragmentation and page_count >= 1000. e. To reorganize index SQL Server, right-click it & choose Reorganize. ” Select the vault database(s). The equivalent statistics update can be achieved by: UPDATE STATISTICS . Para índices columnstore em SQL Server (a partir de SQL Server 2016 (13. This is great if you want to release some space quickly. @OnlyModifiedStatistics = 'Y'. Hallengren website has an option to reorganize indexes say with 5% Fragmentation, and rebuild for 30% Fragmentation. Index Reorganize During Database Full Backup. the year and month columns. Online rebuilds are online available on the Enterprise version of SQL Server and your version probably isn't, so just set the operation not to be run "Online" on you Wizard. You can add a rebuild index task or reorganize index task into the maintenance plan, but the problem is that you can't really apply any logic to the plan. If the page_count is less than 1000 (or whatever you decide) then you should ignore the index. SQL. REBUILD. ALTER INDEX CCI_TEST on DBO. The database is using the Simple Recovery model. Use the page count reported by DBCC SHOWCONTIG to get an idea of the size of the indexes (each page is 8 KB in size). It eventually makes a Job in your server agent and then you can set a schedule or run the job manually by running this script. x) and in Azure SQL Database, we recommend using ALTER. The first and most popular method is to rebuild indexes. When reorganizing an index, SQL Server acquires an Intent-Exclusive lock on the index B-tree. between 5% and 30% logical fragmentation, reorganize it (using DBCC INDEXDEFRAG. Index Maintenance is one of the major task for a DBA. First, we will start with the "Maintenance Plan Wizard":The rebuild command will defragment all those intermediate pages. Inadequate disk space can degrade performance or even cause the index operation to fail. When you create or rebuild an index, by setting the SORT_IN_TEMPDB option to ON you can direct the SQL Server Database Engine to use tempdb to store the intermediate sort results that are used to build the index. Or if it swapping places of two pages. Requires ALTER permission on the table or view. > 30% ALTER INDEX REBUILD WITH (ONLINE = ON)*. Use Index reorganize option when rate of index fragmentation is b/w 10% to 40%. Therefore, focus on the larger indexes because their pages are less likely to be cached by SQL Server. August 1, 2013 at 3:52 pm. Our Production instance is running SQL Server 2014. 2. > 30% ALTER INDEX REBUILD WITH (ONLINE = ON)*. REORGANIZE, but shrink is going to take an age, and then you’ll generate a ton of log doing the fragmentation removal. 2. configurations setting for fill factor. Dokumentasi SQL Server menggunakan istilah pohon B umumnya dalam referensi ke indeks. The. Reorganize/Rebuild SQL Server database indexes using ApexSQL Defrag ApexSQL Defrag is a 3rd party tool made specifically to automatically fix index fragmentation in SQL Server databases. After month the same query took up to 20-30 s. When investigating we found that the index reorganise for the clustered index of FooDetail takes between 90 minutes and 120 minutes. ALTER INDEX All ON tableName REBUILD; This drops the index and recreates it, removing fragementation, reclaims disk space and reorders index pages. Yup, that is one perfectly valid way. The fi rst factor is whether you have SQL Server Standard Edition or SQL Server Enterprise Edition. dbo. dbForge Index Manager for SQL Server will. Expand the Management folder. To create SQL database maintenance plan, launch SQL Server Management Studio > expand the database instance > Management > right-click on the maintenance plan > New Maintenance Plan. We check the time for sample select query - it was 2s just after index creation. If you truly want to REBUILD, and you want to do it for ALL indexes on a given table, then the command would be (straight from the official docs that npe pointed you at): For more instructions see the official docs. This will invoke the Tuple Mover , which will turn closed delta stores into compressed rowgroups. SQL Server also supports nonclustered columnstore indexes. The. dm_db_index_physical_stats (NULL, NULL, NULL, NULL, NULL); GO. index_type_desc,. The default value for this parameter will be ‘CATALOG’. When you rebuild, SQL creates a new fresh index. The. Right-click the table on which the full-text index is defined, select Full-Text index, and on the Full-Text index context menu, select Properties. dm_db_index_physical_stats DMV). dm_db_index_physical_stats (under the Examples -> D section: Using sys. It is used when the operation takes a. sysindexes compatibility view; therefore, preventing unnecessary updates of unchanged items. dm_db_index_physical_stats in a script to rebuild or reorganize indexes). So now once you have identified the high fragmentation level in your database, which could. This tool provides index analysis to manage index defragmentation, including rebuild and reorganize fragmented indexes . 1. Wouldn’t rebuilding an index with MAXDOP=4 on a heavily utilized SQL Server result in the index being (again) fragmented after the rebuild? This could happen in the case where they’re a lot of statements waiting to be processed and the database engine assingning the subtasks of the index reorganize in portions to different queues. Dalam indeks rowstore, SQL Server mengimplementasikan pohon B+. DROP INDEX when. In SQL Server, the ALTER INDEX statement is used to modify an existing index. UPDATEIn this article. Expand the Indexes. CREATE PROCEDURE dbo. REORGANIZE can take much longer than REBUILD, but if you have no choice, you have to go with it. WITH (ONLINE=ON) causes locking. Basically every hour I query the dm_db_index_physical_stats dynamic management view and if an index is between 5% and 30% fragmented I. Update Statistics. 5. But the index is updating itself properly. This would also keep the original order of columns. If we have 10-30% fragmentation a REORGANIZE is performed, and a REBUILD is performed when we have greater than 30% fragmentation. dm_db_index_physical_stats function in SQL Server, and the general recommendations in the Books Online are: If an index has less than 1,000 pages, don’t bother removing fragmentation; If the index has:. So I ran reorganize indexes and that took care of the fragmentation problem. So far, all good. Reorganizing an index only deals with the fragmentation that exists, and the more fragmentation there is, the longer a reorganize will take. However, imagine that you have seven years of data. Indexes play a vital role in the performance of SQL Server applications. Hi, in a prod environment, for insufficient available storage, the rebuild index task against some tables is stopped. You should intelligently do index reorg and rebuilds. I'm currently using the approach described here: sys. ALTER INDEX index_name ON table_name REBUILD -- REORGANIZE. The Reorganize Index task reorganizes all indexes, regardless of fragmentation level. Right-click the Maintenance Plans folder and select New Maintenance Plan. Index rebuilding and reorganizing are the two methods to maintain indexes and improve database performance. ALTER INDEX REBUILD on an truncated and therefore empty table serves no purpose, so you need to amend your Plan A. Rebuilding your indexes will slow queries down. Applies to: SQL Server. If the command that's running is a reorg, you can just kill it. Select the Compact large object column data check box to specify that all pages that contain large object (LOB) data are also compacted. before i answer your question is the database on simple recovery. I am getting confused with choosing Index Reorganize/Rebuilding of indexes based on avg_fragmentation_in_percent returned by sys. Expand the Tables folder. However, you can use the following methods to rebuild your indexes: Method 1: Create a SQL Server agent job to rebuild indexes and update statistics. Reference to below article and discussion, rebuild only if page count >=1000If you want to try : I would like you to use READ_COMMITTED_SNAPSHOT isolation level for this operation and see if you succeed. The issue is resolved. Rebuild the NCIs. This is a best practice for performance when you rebuild or reorganize indexes. Online rebuilds are online available on the Enterprise version of SQL Server and your version probably isn't, so just set the operation not to be run "Online" on you Wizard. INDEX_REORGANIZE Reorganizes the index. A page is a small section of a database, typically an 8kb chunk. The REORGANIZE modifier for ALTER INDEX is not currently supported by Azure SQL. The Page Fullness is 98. Click OK. ALTER INDEX ALL ON Adventureworks. For rows that contain LOB columns, the normal page will contain a reference to the LOB page. Bulk amount records are deleted and updated frequently. index rebuild/reorganize frequency. This schema modification lock blocks all other concurrent access to the table, but it is only held for a very short period of time while the old index is dropped and the statistics updated. You can still run the index reorg/rebuild as part of your maintenance scripts. ALTER INDEX All ON tableName REORGANIZE;The minimum permission to create/alter index can be easily found in corresponding BOL articles CREATE INDEX (Transact-SQL) and ALTER INDEX (Transact-SQL):. Next Steps This is a simple base script that could be modified into a stored procedure and also allow you to pass other parameters such as. To fix the fragmentation either rebuild or reorganize the index on the table. SQL Server Rebuild. To solve this, I want to use the REORGANIZE operation every time. One of the major reasons I wrote DBCC INDEXDEFRAG for SQL Server 2000 was as an online alternative to DBCC DBREINDEX. . We need to set these parameters for the job IndexOptimize - USER_DATABASES: @UpdateStatistics = 'ALL'. SQL Server NULL Index. reorganize pages. On the SQL Server Maintenance Plan Wizard page, select Next. 1. You should also include page_count value in your query. If you're looking for whenif the index was ever rebuilt, the Ola sp does have the ability to log to a table and the previous DBA hopefully utilized this feature. 3. From stackoverflow page ( How Often should the indexes be re-build in sql-server DB?) i got this query : SELECT t. Reorganizing an Index should be done when you have elevated amounts of white space within your index (i. If you search for index rebuilding, you will find many complex scripts on the web, but this can also be done. MS advises using Reorganize for 30% fragmentation or less. After rebuilding indexes, the application performs badly. REORGANIZE, or to rebuild the index using ALTER INDEX. Index fragmentation increased significantly after rebuild. Mohamad Mahmoud Darwish. DBCC DBREINDEX - use to re-index with older versions (SQL Server 2000 and earlier) sys. Partitions can be rebuilt individually. 3,895 9 51 77. NAME 'Index name', ips. Even though this is an online activity, you. Reorganize does not holds blocking locks. There are a number of differences. 6. This to me would be a sign that constant rebuilds of that index actually aren't a good help. The Microsoft Docs page for SQL Server statistics states: Operations such as rebuilding, defragmenting, or reorganizing an index do not change the distribution of data. 8. The first and most popular method is to rebuild indexes. This means you can grant alter table on every table of interest that already exists. Reorganizing an index is a faster, lightweight version of rebuilding and the indexes remain online. Index Reorganize/ Rebuild Time. Both create/rebuild of columnstore index is an OFFLINE operation at this time but you can defragment columnstore index ONLINE. Update Statistics. Sc (Comp Sci). You can use Ola's Index maintenance solution or Michelle Ufford's - Index Defrag Script. I figured, the reason was because of the page_count, which was lower than 1000 for each of the indexes that were still very fragmented. In the Rebuild Indexes dialog box, verify that the correct index is in the Indexes to be rebuilt grid and click OK. I was going to take a look at Ola Hallengren 's scripts and some other stuff but wanted to see if there was possibly a simple explanation for this. Reorganize a fragmented SQL Server index and optimize performance. line is helpful to give the user some indication of what indexes it is rebuilding and how far it has progressed. In SQL Server, you "might" run into issues with "updating primary key". If you want to know how far along it is, open up another instance of SSMS and connect to the server, then run a query against the sys. You should always do some form of intelligent rebuilding - i. The second part of this tip is intended to reduce the duration for update statistics as it pertains to both. Rebuilding an index does two things. partition_number The number of an existing index partition to rebuild/reorganize. Total fragmentation is 96% page fullness 66%, avg row size is 20,. To execute our task, we can right-click on the plan and choose Execute. Jan 11 at 14:24. It is compatible with all versions of SQL Server 2005 , 2008 , 2012 , 2014 and 2016. It gives you better advantage when tempdb is. Basically, rebuilding is a total rebuild of an index - it will build a new index, then drop the existing one, whereas reorganising it will simply, well. The possibility to. Rebuild Index. Identify and remove index fragmentation – this is obviously what we have been talking until now and the biggest part of the SQL index maintenance. In SQL Server, when rebuilding an index which previously had statistics updated with PERSIST_SAMPLE_PERCENT, the persisted sample percent is reset back to default. However, my SQL Server license is Standard and I can't rebuild indexes online. Check total_pages in sys. Use the ReorganizeIndex Task dialog to move index pages into a more efficient search order. Maybe I am reading a different article - but what you linked to is actually worse. Designing the SQL Server Reorganize Index Task. April 1, 2009 at 5:07 am. This article *recommends* REORGANIZE as the primary method to be used and then links to code that uses the same. every 2-3 day if running maintenance once per day (night). I'd like to propose to use REORGANIZE index and so I need to tell the related real benefits. #969726. Because of this, and also the fact that in such a small index that fragmentation is typically negligable, you really should only be rebuilding indexes with a certain page threshold. . When you rebuild, SQL creates a new fresh index. Method 2: Manually create rebuild job using scripts and scheduled as. Index fragmentation is pretty meaningless in regards to performance. All they do is waste space and resources. Microsoft Certified Master: SQL Server, MVP, M. I have been advised by a contracted SQL Server expert that, after any change in # of CPUs and/or available memory, I should reorganize all indexes and then update all statistics or SQL Server will. – Ed B. One thing to ask! When I reorganize MSDB. 1 Answer. Hi all, I have SQL Server 2017 Edition and see harmful fragmentation for all tables in DB. The table at issue has 111,543,114 rows. This means that an index can be rebuilt without knowing the structure of a table or its. Index Rebuild operation first drops and then recreates the index. The Reorganize Index task encapsulates the Transact-SQL ALTER INDEX statement. The real moral of the story is that it’s really hard to build demo code that effectively conveys the point you want to make. Under Select a page, select Options. The Query Optimizer. First it’ll try an index reorganize, which is an online operation. Best regards,. Clean Up History. Reorganizing or rebuilding a cluster index does not have any impact on the non-cluster indexes in SQL Server 2000 SP4 or above, or any version of SQL 2005 or. Some operations that took ~90s now take ~6mins. Next the New Job window will open. SORT_IN_TEMPDB means that SQL server will use tempdb to allocate the temporary space as opposed to allocating space in the user database whose index is being rebuild. SELECT OBJECT_NAME(ind. Rebuilding indexes only does the index itself so the column stats are stale unless they hit the "20% data change + 500 records" criteria to trigger the auto-update. The best practice recommendation is to reorganize your index if you have 5-30% of fragmentation, and only rebuild it if it has more than 30% fragmentation. ". indexes. Index should be rebuilt when index fragmentation is greater than 40%. For example, the heaviest index (clustered index and also pk) is running reorg for around 4 hours 30 min even do the index was. TEST REORGANIZE We get our open delta store again, which will cause locking. So you should explicitly set a deadlock priority, and perhaps a retry loop, to enforce the behavior and document it. Hi Team, Today when I go through some of the SQL Server performance videos, found one interesting video (Please find the link below), where he said that rebuilding indexes is a very expensive thing and it will clear the cache every time an index rebuild happens, (It means that we indirectly killing the SQL Server everything we. GO. Modifying a SQL Server Maintenance Plan. They are also configured from SSMS. Coming to update stats, I would prefer to do it with Full Scan depending on the size of the databases. From Rebuild or Reorganize: SQL Server Index Maintenance by Kendra Little: Short version: Rebuild: An index ‘rebuild’ creates a fresh, sparkling new structure for the index. Frequency of the maintenance should be considered with the goal of minimizing impact of log generation. It is compatible with all versions of SQL Server 2005 , 2008 , 2012 , 2014 and 2016. Designing the SQL Server Reorganize Index Task. To create a new maintenance plan, right click on Maintenance Plan and select New Maintenance Plan and the following window will open. This has a benefit. dm_tran_database_transactions DMV:This offline index rebuild could be done at the table or the partition level. I would suggest that you use Ola Hallengren's scripts, freely available and widely used. Rebuild Index using ApexSQL Defrag ApexSQL Defrag Overview. Problem. Sumanta Roy (5/26/2011) Select Name as IndexName, STATS_DATE ( object_id , index_id ) as IndexCreatedDate. FullTextIndexOptimize. The script will do a reorg if fragmentation goes over 5 %. The index uses the main filters on the sales table from the time dimension, i. Indexes with small number of pages (<1000) will usually. Therefore, you do not need to update statistics after performing ALTER INDEX REBUILD, DBCC DBREINDEX, DBCC INDEXDEFRAG, or ALTER INDEX REORGANIZE operations. As a good start, read these: Rebuild or Reorganize: SQL Server Index Maintenance (Kendra Little)“Reorganize” index option. Recall the paper example from above: a rebuild would be like reprinting the document in the correct order and trashing the old ones. Sorted by: 1. Although this option increases the amount of temporary disk space that is used to create an index, the. Hence, we have configured and tested the Rebuild Index task. set @SQL = 'alter index ' + QuoteName ( @IndexName ) + ' on ' + QuoteName ( @TableName ) + ' rebuild';. Jan 11 at 14:24. (About 1 TB of data including myIndex (non. You need to do more research but basically, reorganize as often as needed to keep your fragmentation under 20-30% until you can rebuild it during off-hours. Total records at that time were 879 & after short time fragmentation went up to. 1 Answer. Right-click the index for which you want to set the max degree of parallelism and select Properties. Rebuild of indexes is the prime job of a DBA as heavily fragmented indexes can degrade query performance and cause your application to respond slowly. Index fragmentation problem after disabling page-level locking for an Index. Statistics on indexes automatically get updated when the indexes are rebuilt. We have a maintenance script which analyses the page_count and fragmentation of the indexes and follows the following guideline:-. The query processor uses statistics on your data to help determine how. ALTER INDEX [PK_SalesOrderDetailEnlarged_SalesOrderID_SalesOrderDetailID] ON [Sales]. SQL Server 2005 Index Rebuild/Reorganize. the reorganize index also facing some problem like it is successfull once in three runs and twice it is failing. Basically there’s no really easy AND resource-efficient way to do this, which is a problem with SQL Server. By using the Rebuild Index task, a package can rebuild indexes in a single. x) 以降) および Azure SQL データベース における列ストア インデックスの場合、REORGANIZE では、次の追加のデフラグ最適化がオンラインで実行されます。 行の 10% 以上が論理的に削除されたとき、行グループから行を物理的に削除します。Also when I try to reorganize or rebuild manually, using one of the following commands: use DBNAME. DBCC DBREINDEX rebuilds an index for a table or all indexes defined for a table. reorganize pages. Which is the best method to reorganize sql server database. indexes ind ON ind. It has an IF condition for the Reorganize but i don't need it, i need to modify the code so it queries indexes of a certain database and schema and rebuilds only if the fragmentation is bigger than 5%. . This procedure automatically chooses whether to rebuild or reorganize an index according to its fragmentation level, amongst other parameters, and update statistics. REBUILD will not just rebuild index, but also force update of corresponding statistics. Answers. Enable Row Level and Page Level Locks. It will have a parameter called @MaintenanceMode that can be set to either ‘INDEX’ or ‘CATALOG’ in order to choose the way we want to maintain our Full-Text indexes. This caused the system to reorganize or rebuild. I have this piece of code which helps me rebuild indexes if they are fragmented to a certain percentage. I have maintenance job on SQL Server 2012 Enterprise Edition that runs daily to check index fragmentation and reorganize or rebuild the index based on the percentage of fragmentation. When you reorganize the index, you go through the existing index, cleaning up blocks for deleted records etc. Sorted by: 5. Speaking for SQL Server, I tend to choose a index size and index fragmentation level at which point I begin performing index maintenance. index_id > 0 -- Indexes. Applies to: SQL Server SSIS Integration Runtime in Azure Data Factory The Rebuild Index task rebuilds indexes in SQL Server database tables and views. You can also slow down fragmentation by inserting data in the order of the index. Starting from SQL Server 2016, new options were added to the index maintenance tasks that allow us to perform the Rebuild Index and Reorganize Index tasks, based on the fragmentation percentage of the index, and other useful options to control the index maintenance process. The documentation for alter index, for example, shows that it accepts an index_name, not an expression that might evaluate to an index name. x) implemented major performance improvements for these index operations. You can always update statistics on their own. For a more in-depth discussion of index rebuild and maintenance in SQL Server 2014 see SQL 2014 Clustered Columnstore index rebuild and maintenance considerations Consider the two trimmed row group scenarios below:AFAIK, In the Alter index statement if we use MAXdop option it is only specific for that index operation and not applicable whenever the index is used by a query. Both versions allow you to specify the. Also trying to avoid logging to transaction log and log. This means you will need less free space in your user database during an index rebuild operation and more free space in tempdb. [Product] SET ( ALLOW_PAGE_LOCKS = ON ) ALTER INDEX [PK_Product] ON [Production]. I think there is another way to rebuild fragmented index, You can create an sp and scheduled it via SQL Server Agent or via task scheduler. To rebuild or reorganize indexes manually, head over to the Fragmentation tab. The first steps of configuring the Reorganize Index task is quite similar to the Rebuild Index task. From sys. SELECT * FROM sys. It's so bad on indexes that fragment that it's actually the cause of the myth of Random GUID Fragmentation. 例えば、10 % 以上 30 % 未満であれば再構成 (Reorganize)、 30% 以上であれば再構築 (Rebuild) するとすれば、上記の. SQL Server, MVP, M. From Reorganize and Rebuild Indexes. An index rebuild operation cannot be interrupted without it rolling back everything it’s done so far – it’s atomic – all or nothing. Yes -. Failing that (ie Standard Edition etc), look at re-organizing indexes - these will keep them online. Index Rebuild operation first drops and then recreates the index. We will use 3 statements in order to show the blocking: ALTER INDEX. Index maintenance in my opinion is not one of them. Here is MSDN article on this: Reorganizing and Rebuilding Indexes. – Ed B. Exclusive page locks are taken on individual pages only while those pages are being manipulated. The process uses the existing pages only and does not allocate new ones, but it does compact the index pages. Default SQL Server value is 0 or 100%, which means that no free space should be left on each page. dm_db_index_physical_stats (Transact-SQL). SQL Server Maintenance plans – Maintenance plans are shipped with SQL Server and are nice for some tasks. A SQL Server DBA myth a day: (29/30) fixing heap fragmentation. Edit 2: Nikita added a good point on moving the data to a different filegroup as an option to exporting it outside SQL Server. If you don’t spend much time with SQL Server and you. Microsoft best practice says that you should generally not do a rebuild operation unless fragmentation is over 30%. Should be straight forward. The second set of options, in figure 8-5, rebuilds only a single partition of a clustered columnstore index and optionally changes the compression type. ALTER INDEX [name_of_the_index] ON [table_name] REORGANIZE; If you want to reorganize all the indexes on any table, you can run the following syntax. Check indexes from the index grid and click desired defragment operation from the ribbon. In other words, zero percentage fragmentation:. Oct 4, 202335. ALTER INDEX TableDetails_UK0 ON TableDetails REBUILD WITH ( PAD_INDEX=OFF, SORT_IN_TEMPDB=ON. Compaction is based on the existing fill factor value. Sc (Comp Sci). Select * from sys. Right-click the index that you want to rebuild online and select Properties. Under Select a page, select Options. I’m talking about the guidance which is: if an index has less than 1000 pages and is in memory, don’t bother removing fragmentation. ALTER INDEX statement can be used to change the properties of an index, such as its fill factor or sort order, or to rebuild or reorganize the index. It doesn’t work on the intermediate pages between the root and the leaf. 3. ALTER INDEX [myIndex] ON [dbo]. Reorganizing an index uses minimal system resources. ALTER INDEX REORGANIZE; however, log space is required. The first rebuilds a single index on a table and the second rebuilds all the indexes on the table. or to reorganize use: ALTER INDEX __NAME_OF_INDEX__ ON __NAME_OF_TABLE__ REORGANIZE. In this case Reorganize option is selected: DBCC DBREINDEX rebuilds an index for a table or all indexes defined for a table. less than 10% logical fragmentation, don’t. Executing this query requires the VIEW SERVER STATE permission. dm_exec_requests showed the REORG was only 55%. Let’s move on to creating the Reorganize Index task via the Maintenance Plans and then Update Statistics task. setting shrink file = 361,360 (min allowed) Among your question steps, this is the right one. Execute SQL Server Agent Job. Largest table has around 500. Best regards, Carrin SQL Server ALTER INDEX Syntax. If your indexes are fragmented : If index has less than 1000 pages - do not perform any index maintenance operation. You should REBUILD indexes every weekend, UPDATE STATISTICS every night. Last night I killed the REORG on the clustered index after almost 6 hours of execution. Reorganize Index. Index in SQL Server . If the index’s design doesn’t allow for that, IndexOptimize will try to rebuild the index online. That's why as a rule of thumb, for fragmentation greater than about 30%. One can also reorganize an index using. The documentation is also indicating that: Online index operations are not available in every SQL Server edition. Compaction is based on the existing fill. When you reorganize an index, SQL Server physically reorders the leaf-level pages to match the logical order of the leaf nodes. (About 1 TB of data including myIndex (non-clustered)). Feb 21, 2022, 8:01 AM. After an index reorganize, yes, for all statistics as none of them are updated by the. This removes fragmentation, reclaims disk space by compacting the pages based on the specified or existing fill factor setting. Use the ReorganizeIndex Task dialog to move index pages into a more efficient search order.