REORGANIZE is an "online" operation, which means it doesn't take a big Sch-M lock at the beginning of the operation to have exclusive. As visible in the above image, REBUILD and REORGANIZE are the two available choices to play out the trim operation over the page. The. An index reorganize holds an intent-exclusive table lock throughout the operation, which will only block shared, exclusive, and schema-modification table locks. The fill factor determines the amount of empty space on each page in the index, to accommodate future expansion. _in_percent > 50 AND ss. Next the New Job window will open. Reorganizing an index uses minimal system resources and is an online operation. For example, you can use ApexSQL Defrag to review the index usage statistics and apply the suitable. However, a new database server backed with Intel PCIe SSDs is showing the opposite of what we expect. As a general (widely accepted) rule of thumb is . We should reorganize indexed with. Also, it is possible to do it with the help of SSMS (SQL Server Management Studio): Choose the database and then the table where you want to Reorganize and. In order to rebuild the index SQL Server still needs a copy of the data and must reorganize the data as the index is rebuilt. Another possibly is that the index is being rebuilt and then re-fragmenting again. ixRebuild @fillfactor int = 100, @Force bit = 0, @Schema varchar (255) = NULL, @Table varchar. This task uses the ALTER INDEX. 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. just like many things in RDBMS. This will invoke the Tuple Mover , which will turn closed delta stores into compressed rowgroups. You have to do some research and tailoring of how and when to do it based on your environment, though. every 2-3 day if running maintenance once per day (night). Reorganizing should be used at lower (<30%) fragmentations but only rebuilding (which is heavier to the database) cuts the fragmentation down to 0%. ALTER INDEX ALL ON [dbo]. index rebuild/reorganize frequency. This means that an index can be rebuilt without knowing the structure. The first and most popular method is to rebuild indexes. dm_exec_requests showed the REORG was only 55%. I'm just using the reorg index task that is in the maintenance plan designer GUI. در این مقاله چگونگی reorganize و rebuild کردن ایندکس تکه تکه شده (Fragmented Index) در SQL Server 2014 با استفاده از محیط SSMS یا SQL Server Management Studio و T-SQL یا Transact-SQL شرح داده خواهد شد. 7. The simple reason which comes to my mind is rebuild should be done only when index is fragmented. From a transaction log standpoint, reorganize index generates a lot more small transactions and can lead to substantially more resource-consumption than a rebuild. SQL Server index fragmentation is unavoidable, but you can minimize the negative effects of fragmentation on database performance. Next the New Job window will open. ALTER INDEX [myIndex] ON [dbo]. e check fragmentation and take an appropriate action. I am getting confused with choosing Index Reorganize/Rebuilding of indexes based on avg_fragmentation_in_percent returned by sys. We will use 3 statements in order to show the blocking: ALTER INDEX. Applies to: SQL Server. 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. 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. It should be: TRUNCATE; Insert ; ALTER INDEX REBUILD; It might stil be slow, but at least you get sharp indexes. dm_db_index_physical_stats system dynamic management function which returns a list of indexes created on SQL Server instance with enough information for a database admin to decide if the sql index is fragmented or not. x) implemented major performance improvements for these index operations. I'd just add that adding the line PRINT @sql after the SET @sql =. There are two ways of doing that: (i) by using the ‘ DBCC SHOWCONTIG ‘ command, and (ii) by using the ‘ sys. You can also change this threshold via parameters. The discussion of columnstore indexes thus far has focused on clustered columnstore indexes that target a primarily OLAP workload. Expand the Indexes folder. Index Defrag Script V4. The first and most popular method is to rebuild indexes. Here is a sample script to reorganize any index in SQL Server. This had a negligible impact. e. This makes it more likely that some other session is blocked by your session, and that you may, in turn, become blocked by a lock held by that session. If the underlying table is a clustered index, then for the CI and all non-clustered indexes both rebuild and reorganize are available. My problem is that the reorg is running for a very long time. Rebuild or reindex ?? good question ! Analysis indexes defragmentation RATIO and decide to REORGANIZE OR REBUILD. By allowing an index to be rebuilt dynamically, indexes enforcing either PRIMARY KEY or UNIQUE constraints can be rebuilt without having to drop and re-create those constraints. ALTER INDEX CCI_TEST on DBO. 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. Index rebuilding and reorganizing are the two methods to maintain indexes and improve database performance. From sys. The syntax for rebuilding indexes is very simple, we just add the "WITH ONLINE=ON" clause to the ALTER INDEX command. For example, one of the indexes with a page_count of 967 has a fragmentation percentage of 98,98%! To me, it seems worth rebuilding that index! I did, and afterwards, the fragmentation was 0%. I'm trying to find out how our production database indexes are getting fragmented. Hence, we have configured and tested the Rebuild Index task. This tip will explore two features to speed up SQL Server index and statistics maintenance. line is helpful to give the user some indication of what indexes it is rebuilding and how far it has progressed. DBCC DBREINDEX - use to re-index with older versions (SQL Server 2000 and earlier) sys. Quick explanation: An online Rebuild, rebuilds the indexes on the tempDB making it available to the queries while it is being rebuilt. Yet, we do it at least every 2 weeks, and often times more often. If the page_count is less than 1000 (or whatever you decide) then you should ignore the index. REORGANZE index - is for reducing fragmentation without index rebuild, so no drop and create. It's better to do reorg on Nightly basis and Rebuild during the weekends. The syntax for rebuilding indexes is very simple, we just add the "WITH ONLINE=ON" clause to the ALTER INDEX command. Enable Row Level and Page Level Locks. 0. Create jobs to automate maintenance – create a SQL Server Agent job that will automate SQL index maintenance. Index should be rebuild when index fragmentation is great than 40%. This is fixed in later service packs of SQL Server 2005 Management Studio. . The length of time the rebuild takes is related to the size of the index, not the amount of fragmentation in it. It defragments the leaf level of clustered and nonclustered indexes on tables and views by physically reordering the leaf-level pages to match the logical, left to right, order of the leaf nodes. Here are a couple of examples. No right from SQL Server 7. . . If you cancel a rebuild operation midway, it. Right-click the index you want to reorganize and select Reorganize. Problem. 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. dm_db_index_physical_stats (NULL, NULL, NULL, NULL, NULL); GO. SQL Server also supports nonclustered columnstore indexes. the reorganize index also facing some problem like it is successfull once in three runs and twice it is failing. The. If you search for index rebuilding, you will find many complex scripts on the web, but this can also be done. Total fragmentation is 96% page fullness 66%, avg row size is 20,. 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. Copied the LOB column to another table, dropped the column, re-created the column, and copied the data back (as outlined in this post: Freeing Unused Space SQL Server Table). 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:. If rate of Index fragmentation increased then index de-fragmentation is become required. You should intelligently do index reorg and rebuilds. Both create/rebuild of columnstore index is an OFFLINE operation at this time but you can defragment columnstore index ONLINE. One of the possibilities that we have in SQL Server to keep our indexes defragmented, is the index reorganize operation. Best regards, Carrin SQL Server ALTER INDEX Syntax. To rebuild or reorganize indexes manually, head over to the Fragmentation tab. Yup. or to reorganize use: ALTER INDEX __NAME_OF_INDEX__ ON. 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. Well, I’d wager some of it is backwards compatibility. Once you select that option it will bring up the following screen. Larger indexes have more intermediate levels and pages. Therefore, you do not need to update statistics after performing ALTER INDEX REBUILD, DBCC DBREINDEX, DBCC INDEXDEFRAG, or ALTER INDEX REORGANIZE operations. Disable the indexes on the target table (at least the non-clustered indexes, or NCIs) Insert the new data. Please refer to SQL Server Maintenance Plan Reorganize Index and Update Statistics Tasks to get more information about how to design the maintenance plan. SQL Server does not maintain when an Index was last rebuild, instead it keeps information when stats were last updated. I would prefer to rebuild the indexes where the fragmentation percent of the indexes is greater than 30% and a Re-org of indexes where fragmentation percent is in between 9% and 30%. But the index is updating itself properly. 7. ApexSQL Defrag is a powerful application used for scheduled analyzing and defragmenting of SQL Server database indexes. before i answer your question is the database on simple recovery. When using columnstore indexes, the delta store may end up with multiple small row groups after inserting, updating, and. Optimize SQL Server non-clustered indexes and queries by considering index fields, compound indexes and SQL Server statistics. For rows that contain LOB columns, the normal page will contain a reference to the LOB page. 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. EXEC msdb. This. Expand Tables. This opens the Toolbox and the maintenance_plan_name [Design] surface with the Subplan_1 subplan. It is causing other queries to wait, even simple ones like: SELECT * FROM tableName WHERE indexedColumn = @value. Here is a procedure what I wrote. sp_start_job N'NAME OF JOB'. Compaction is based on the existing fill. Select Allow online DML processing, and then select True from the list. This allows you to interrupt the rebuild and preserve the work already done. Feb 21, 2022, 8:01 AM. 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. e. Last night I killed the REORG on the clustered index after almost 6 hours of execution. Clean Up History. Please refer to SQL Server Maintenance Plan Reorganize Index and Update Statistics Tasks to get more information about how to design the maintenance plan. By default, SQL Server uses a 100% fillfactor and tries to fill up all the pages in indexes as close to full as it can. It's not documented to have a particular deadlock priority, and it does make data changes. 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. Bulk amount records are deleted and updated frequently. It is an on-disk structure that comprises of keys that point to one or more columns in the table or view. In SQL Server Management Studio, in Object Explorer, expand the server. We check the time for sample select query - it was 2s just after index creation. This task uses the ALTER INDEX REORGANIZE statement with SQL Server databases. Under Select a page, select Options. Right-click on the index rebuild task and click on Edit…. It drops index entirely and creates it from scratch. Firstly you should take into account the page_count of the index. The query processor uses statistics on your data to help determine how. Designing efficient indexes is paramount to achieving good database and. Index should be rebuilt when index fragmentation is greater than 40%. Check the column, avg_fragmentation_in_percent and if its greater than. こんにちは。開発部基幹SREチームの廣瀬です。 弊社では、システムの一部にSQL Serverを使用しています。 本記事では、SQL Serverにおけるインデックスのメンテナンス方法である再構成と再構築について、それぞれを実行した場合のクエリ性能の比較結果をご紹介したいと思います。 比較を実施. 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. So any insert in the middle of the key range, and likely any update too, will cause a page split and fragmentation. REORGANIZE seems to work as well as REBUILD all the time. Does database on which tables reside have database owner. Useful links. By allowing an index to be rebuilt dynamically, indexes enforcing either PRIMARY KEY or UNIQUE constraints can be rebuilt without having to drop and re-create those constraints. I know the sql to perform this action on all indexes in a table is alter index all on table_name reorganize; But I only want to rebuild or reorganize if . 1 Answer. To create a linked server to azure, you can see this SO link:I need to add a linked server to a MS Azure SQL ServerSelect “reorganize index” and “rebuild index. The scripts has some cool features like. Backup Up Database (Full) 4. dm_tran_database_transactions DMV:This offline index rebuild could be done at the table or the partition level. Thanks for your. There needs to be an automated Index defragmentation job that will either reorganize or rebuild the indexes based on the fragmentation level for a specific table in a specific database. When you. 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. REBUILD. Right-click the Maintenance Plans folder and select Maintenance Plan Wizard. Options. USE AdventureWorks; GO ALTER INDEX ALL ON Production. Reorganize: Reorganize indexes with between 11-30 percent fragmentation. – Ed B. I am a new DBA to a SQL 2005 production Report server. Drag and drop the index rebuild task from the maintenance plan toolbox. SQL Server development version and Enterprise version has option ONLINE, which can be turned on when Index. A clustered index exists, along with 3 non-clustered indexes. It's so bad on indexes that fragment that it's actually the cause of the myth of Random GUID Fragmentation. I'd just add that adding the line PRINT @sql after the SET @sql =. avg_fragmentation_in_percent FROM sys. Is this possible to do? Creating a SQL Server Maintenance Plan. 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。. If you don’t spend much time with SQL Server and you. The size of one of the PK Clustered indexes is greater than 200GB, and for this one a REBUILD. Edit 2: Nikita added a good point on moving the data to a different filegroup as an option to exporting it outside SQL Server. This article *recommends* REORGANIZE as the primary method to be used and then links to code that uses the same. " But following the Russ's reply the REORGANIZE is a more time expensive operation the REBUILD one. Bulk amount records are deleted and updated frequently. We have a maintenance script which analyses the page_count and fragmentation of the indexes and follows the following guideline:-. USE AdventureWorks; GO ALTER INDEX ALL ON Production. We use SQL Server Index Rebuild and Reorganize operation to remove fragmentation level of the indexes. Dalam indeks rowstore, SQL Server mengimplementasikan pohon B+. Online & Offline Index Rebuild. In this case Reorganize option is selected: DBCC DBREINDEX rebuilds an index for a table or all indexes defined for a table. 1. . "There are a variety of mechanisms for rebuilding indexes. When to rebuild and when to reorganize indexes. Microsoft best practice says that you should generally not do a rebuild operation unless fragmentation is over 30%. Particularly if you are in full recovery. ALTER INDEX ALL ON Adventureworks. Large objects (LOBs) are stored in different "pages". And if the reorganize is a deadlock. If you want to rebuild an index the syntax is below: ALTER INDEX. There are two options to fix fragmentation. Therefore, focus on the larger indexes because their pages are less likely to be cached by SQL Server. [<table_name>] REORGANIZE How to Reorganize and Rebuild Indexes using SSMS. 000. But commit your whole transaction before reorganize. The following example returns all statistics for all tables and indexes within the instance of SQL Server by specifying the wildcard NULL for all parameters. some action needs to be taken to remove the ghosted records. By allowing an index to be rebuilt dynamically, indexes enforcing either PRIMARY KEY or UNIQUE constraints can be rebuilt without having to drop and re-create those constraints. Expand the Tables folder. •DatabaseBackup: SQL Server Backup •DatabaseIntegrityCheck: SQL Server Integrity Check •IndexOptimize: SQL Server Index and Statistics Maintenance. Recall the paper example from above: a rebuild would be like reprinting the document in the correct order and trashing the old ones. @OnlyModifiedStatistics = 'Y'. 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. ". dm_exec_requests to see how much longer your query has to finish. Select Maximum degree of parallelism, and then enter some value between 1. So it can remove some fragmentation - but only on a limited scale. The Rebuild Index task similarly bulldozes through everything and rebuilds every index, without checking fragmentation. After rebuilding indexes, the application performs badly. One option is to execute an index rebuild, which will move data around on pages. This is larger than the minimum row size. Reorganize Index. 2. NAME 'Index name', ips. DBCC DBREINDEX rebuilds an index for a table or all indexes defined for a table. 7. As you've seen, shrinking your database causes high levels of index. All versions of SQL Server 2008 Management Studio create the index with page level locking enabled by. If the index’s design doesn’t allow for that, IndexOptimize will try to rebuild the index online. They can all be used with no special considerations for replication, with the following exception: primary keys are required on tables in transactional publications, so you cannot drop and recreate primary keys on these tables. Create a job to run your index reorganize ('Reorganize'). If the older date partitions are pretty static , you might benefit from partition level index rebuild / reorganize, depending on sql server version. Reorg the Indexes if the Fragmentation level is > 5% and <30%. The Reorganize Index task also includes an option to compact large object data. In the Name box, enter the name of the maintenance plan you're creating. Proceed to the Steps tab: Clicking on New. Until now I'm using the Maintenance Plan Index rebuild task to. Check indexes from the index grid and click desired defragment operation from the ribbon. Basically there’s no really easy AND resource-efficient way to do this, which is a problem with SQL Server. SQL Agent doesn't connect as SA, and the rebuild index task generates a command that looks like ALTER INDEX [ci_FactInternetSales] ON [dbo]. . But no help, the rebuild itself not working. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance. In this case you can perform index reorganize and index rebuild operations only on those partitions that really need it, thus making it more efficient by reducing the time and resources needed for this maintenance. 8. To create a new maintenance plan, right click on Maintenance Plan and select New Maintenance Plan and the following window will open. allocation_units. I wonder if there is just something weird about the way. Product REORGANIZE GO. Er…. [Test] REBUILD WITH (ONLINE = ON); Additionally, I would only rebuild indexes which require it. 2. You can read more on rebuilding indexes here . WITH (ONLINE=ON) causes locking. There are two options to fix fragmentation. There are some good reasons to Rebuild an index, like updating statistics. Expand the Indexes folder. Use the Reorganize Index task followed by the Update Statistics task; If you have the Enterprise Edition of SQL Server, the Maintenance Plan Wizard offers a Keep index online while reindexing option, which means that the index will continue to be available to users even while it is being rebuilt. Users(DisplayName) WITH (ONLINE = ON, RESUMABLE = ON, MAX_DURATION = 1); Those parameters mean: ONLINE = ON means you’ve got the money for Enterprise Edition. You could also refer another query which may be helpful to you. Yes, just the table and any query that tries to access that table. 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. ALTER INDEX [PK_SalesOrderDetailEnlarged_SalesOrderID_SalesOrderDetailID] ON [Sales]. 1. To solve this, I want to use the REORGANIZE operation every time. 23%. The script will do a reorg if fragmentation goes over 5 %. This operation is always online, uses minimal system resources, honors the fill factor that has been used during the creation of the index (common misconception is that reorganize operation does not take into account. This tool provides index analysis to manage index defragmentation, including rebuild and reorganize fragmented indexes . We leave default values here as well. This happens approx. And that frequency can be lowered by using carefully selected fill factor. Expand the table on which we want to reorganize the indexes. 3. As well as maintenance plans, SQL Server Agent jobs are also a handy way to automate and schedule index defragmentation jobs in SQL Server. The fix is to update all rebuild index scripts with explicitly ONLINE option on ON and to make sure it will run on a SQL Server version that supports this (Enterprise and Developer editions) and that will rebuild online only allowed indexes. Executing this query requires the VIEW SERVER STATE permission. Use the ReorganizeIndex Task dialog to move index pages into a more efficient search order. As data is added to the table, the free space fills because the fill factor isn't maintained. And they really shouldn't be because you're using Standard Edition - and parallel index operations are an Enterprise Edition feature. configurations setting for fill factor. ALTER INDEX TableDetails_UK0 ON TableDetails REBUILD WITH ( PAD_INDEX=OFF, SORT_IN_TEMPDB=ON. This is because the Rebuild Index task will destroy all the indexes and build it again from scratch, without considering the fragmentation percentage. Sorted by: 5. We want to create an index. 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%. I'd like to propose to use REORGANIZE index and so I need to tell the related real benefits. [Test] REBUILD WITH (ONLINE = ON); Additionally, I would only rebuild indexes which require it. Right-click the index that you want to rebuild online and select Properties. The query causing the block is in the format: ALTER INDEX [indexName] ON tableName REORGANIZE. The index front is stable, no change. Index fragmentation is pretty meaningless in regards to performance. Now that you learned how to create an index in SQL Server, it is time to undo it (only if you need to)! Learn how to drop an index in the next tutorial. I also removed the the second part of the case statement that uses REORGANIZE. ALTER INDEX ALL ON [dbo]. Which is the best method to reorganize sql server database. We need to drag and drop tasks from the Toolbox (to open the toolbox use Ctrl + Alt + X) into the gray workspace area on the bottom as shown in the below screenshot. You could also refer another query which may be helpful to you. The Reorganize Index task encapsulates the Transact-SQL ALTER INDEX statement. Also, running UPDATE STATISTICS gets you both index and columns stats updates. Rebuilding an index can be either an online operation or an offl ine operation, depending on several factors. The script for the index itself: ALTER TABLE [dbo]. Otherwise you're holding an exclusive lock on the table/partition before you start the reorganize. Just a reminder that index reorganize is always online (all indexes are available during defrag) and index rebuild can be made also online (WITH. You can also set a threshold so that it only considers indexes over a certain size so you're not doing unnecessary rebuilds on tiny indexes. This means there is only 140-ish byte free per page. One solution is to deploy a faster I/O subsystem, where page splits would be less of an issue. . MSDB is utilized by database mail, sql. Solution. The execute sql task should contain the index rebuild code along with stats rebuild . The first part of this tip focuses on SQL Server Enterprise Edition to reduce the duration for index maintenance for off-line rebuilds. it will reorganise it. Jonathan’s right in that fragmentation changes the query plan. Reorganize a fragmented SQL Server index and optimize performance. #1162454. Rebuilds automatically run statistics on your indexes. Index rebuilding and reorganizing are the two methods to maintain indexes and improve database performance. Sorted by: 1. Ideally , microsoft suggests that reorganize should be used for index fragmentation between 5 and 30 % and rebuild for > 30%May 5, 2010 at 8:00 am. Quote from "Microsoft SQL Server 2000 Index Defragmentation Best Practices": "Fragmentation affects disk I/O. You can even stagger which indexes get rebuilt when and perhaps pick the top N index, based on fragmentation level, and REORGANIZE a certain number of them each night. A few thing to consider: Can you insert the data in the order of the index? This will reduce fragmentation. dm_db_index_physical_stats in a script to rebuild or reorganize indexes). . For more information, see Data Types (Transact-SQL). x) and later. Reorganizing is designed to remove logical fragmentation from the leaf level of an index while keeping the index online and as available as possible. You can instantly rebuild and reorganize SQL Server indexes in visual mode or generate SQL scripts for future use. less than 10% logical fragmentation, don’t. The index fragmentation level can be found using the sys. Again you most likely have some big indexes that are fragmented. 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. To rebuild or reorganize indexes manually, head over to the Fragmentation tab. 11:33. 2,057 11 22. 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 all on table_name reorganize; But I only want to rebuild or reorganize if fragmentation percentage on each index is between a certain range. Hi, The widely used thresholds are: Reorganize if fragmentation is between 10-30%. The procedure uses SQL Server ALTER INDEX command, with the REORGANIZE option NULL. Hi, in a prod environment, for insufficient available storage, the rebuild index task against some tables is stopped. Statistics on indexes automatically get updated when the indexes are rebuilt. We can also run the task by running the corresponding job in SQL Server Agent. . The Reorganize Index task also includes an option to compact large object data. – Ed B. Rebuilding your indexes will generate a lot of unused allocated space in the data file. March 2, 2023 at 3:05 pm. This is typically how indexes with page level locking disabled get created. Even though this is an online activity, you. As a good start, read these: Rebuild or Reorganize: SQL Server Index Maintenance (Kendra Little)“Reorganize” index option. [MyHugeTable] ADD CONSTRAINT [MyHugeTable_pk] PRIMARY KEY. There are a number of differences. SQL Server 2019 adds resumable online index creation, and it’s pretty spiffy: 1. Additionally, after reorganizing indexes it is reasonable to update the statistics as this operation does not update the statistics like the index rebuild operation.