The index fragmentation level can be found using the sys. I am not sure from where you have got this script however it seems you are trying to rebuild indexes if the fragmentation level is more than 30 and reorganize if the same is less than 30. "cannot be reorganized because page level locking is disabled" means (in sys. Example: 3. You can reorganize an index-organized table or an index-organized table partition (to recover space or improve performance) without rebuilding its secondary indexes. Dedicated SQL pool offers several indexing options including clustered columnstore indexes, clustered indexes and nonclustered indexes, and a non-index option also known as heap. The Query Optimizer updates statistics when you rebuild an index on a table or view with ALTER INDEX REBUILD or DBCC DBREINDEX, however this statistics update is a byproduct of re-creating the index. [TableName] REBUILD GO-- Check that only clustered index is enabled SELECT OBJECT_NAME (OBJECT_ID), Name, type_desc, is_disabled FROM sys. Like the tests above the initial start point is as per the second screenshot above. It can only be fixed by doing an ALTER INDEX. In this example, disk space requirements to create a clustered index are determined. 5. regarding reorganize - there is an exception to this - if you have columnstore indexes that are frequently subject to deletions or that are subject on inserts in small batches then running reorg. For the first question: Yes, when you change the CLUSTERED INDEX, it means that the data will be rearranged. storage_parameter. To Reindex WSUS Database using T-SQL Script: Launch the SQL Server Management Studio. To re-sort data, use ALTER INDEX REBUILD. It is documented that you can rebuild the index ONLINE for those indexes which has LOB columns as the index key. I manually fired reorganize index (ALTER INDEX cci_myindex ON dbo. There are two options to fix fragmentation. There's a difference between REORGANIZE and REBUILD. One of the major reasons I wrote DBCC INDEXDEFRAG for SQL Server 2000 was as an online alternative to DBCC DBREINDEX. As the max possible rows in a row. We choose "All databases, leave the default values of two other options and click "OK". They work differently toward the same end. Expand the Indexes node. If you are satisfied with the unused space of table, then check the unused space of the database using the same command without specifying a table. SQL Server ALTER INDEX Syntax. What you might want to do, if you still insist on defragmenting your indexes, is to do ALTER INDEX REORGANIZE instead. REBUILD to rebuild the in-row data of the heap, as well as all data of the indexes, and re-enable them. The following index operations require no additional disk space: ALTER INDEX REORGANIZE; however, log space is required. Expand the table on which you want to reorganize an index. and Rebuild if the fragmentation is above 30%. In. Specify the name of the maintenance plan. This results in a short reorganization maintenance window. [User] REBUILD [SQLSTATE 01000] (Message 0). To rebuild an index means to create anew one, then drop the old one. [TableName] REORGANIZE WITH (COMPRESS_ALL_ROW_GROUPS = ON) The transaction can take a long time. Catatan Di SQL Server 2012 (11. x) de y en Azure SQL Database, se recomienda usar ALTER INDEX REORGANIZE en lugar de ALTER INDEX REBUILD para los índices de almacén de columnas. The total fragmentation value will be displayed. It is causing other queries to wait, even simple ones like: SELECT * FROM tableName WHERE indexedColumn = @value. Lorsque vous exécutez ALTER INDEX REORGANIZE, avec ou sans LOB_COMPACTION, la valeur de degré maximal de parallélisme correspond à une opération de thread unique. ALTER. This can slow down query performance as SQL Server needs to read more pages to satisfy a query. A more intelligent way is to check fragmentation first then rebuild or reorganise. ALTER INDEX ALL ON [Database_name]. For more information, see Data Types (Transact-SQL). 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. (I sometimes find that people are doing both against every index in a maintenance plan. gif」の説明 図「alter_index_partitioning. [GerardStatsTest] WITH RESAMPLE, INCREMENTAL=ON; This will make all of the statistics incremental statistics. To reorganize index SQL Server, right-click it & choose Reorganize. Use this command to disable the background task: DBCC TRACEON ( 634 , -1 ). This is inexpensive, online, and will generally keep an index defragmented enough for efficient use for quite a long time. dm_db_index_physical_stats. In PostgreSQL, ALTER INDEX command changes the definition of an existing index. [TableName] REBUILD GO-- Check that only clustered index is enabled SELECT OBJECT_NAME (OBJECT_ID), Name, type_desc, is_disabled FROM. Expand the Indexes folder. Script and result below: ALTER INDEX ALL ON Fragmented REORGANIZE GOExpand the SolarWinds database and find the table or tables indicated in the message. The MSDN ALTER INDEX page says "An index cannot be reorganized when ALLOW_PAGE_LOCKS is set to OFF. x) dan di Azure SQL Database, sebaiknya gunakan ALTER INDEX REORGANIZE alih-alih ALTER INDEX REBUILD untuk indeks penyimpan kolom. One can also reorganize an index using. The new name for the index. If you’re using high availability features like Availability Groups or database mirroring that stream the log between replicas, generating a lot of log data very quickly can create problems. This job needs to be scheduled and ran on a weekly basis due to large data. 1. Querying sys. Designing efficient indexes is paramount to achieving good database and application performance. Under Select a page, select Options. Below is an example of this technique, where the @PartitonNumber value can be changed in a restart scenario. These commands only require a single 8KB page of extra space, instead of needing to build a whole new index in the case of an index rebuild operation (which will likely cause the file. For more info about the options described on this page, see ALTER INDEX (Transact-SQL). The Rebuild Index Task uses the ALTER INDEX statement. Thursday,. Rebuild the index. Change the properties of an index. 1,253 1 1 gold. Use the ReorganizeIndex Task dialog to move index pages into a more efficient search order. For a dedicated SQL pool table with an ordered CCI, ALTER INDEX. Syntax ALTER INDEX index_name ON table_name. Each row is 200 bytes long. SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER OFF GO /* TIPO DO OBJETO. See this blog post for details. Here is the syntax for the same. In SQL Server, you can use ALTER INDEX with the REORGANIZE or REBUILD option. What is index fragmentation, and why is it a concern?Index fragmentation occurs when data pages within an index are disordered or scattered. Listing 14-7 Syntax for a Columnstore Reorganize Operation. 1) Disable all NC indexes. Open the Tables folder & expand it. I tried running both commands separately too and still have fragmentation. Improve this answer. Lorsque vous exécutez ALTER INDEX REORGANIZE, avec ou sans LOB_COMPACTION, la valeur de degré maximal de parallélisme correspond à une opération de thread unique. TEST REORGANIZE WITH (COMPRESS_ALL_ROW_GROUPS = ON) Now we have to good columnstore segment again. ALTER INDEX [PK_SalesOrderDetailEnlarged_SalesOrderID_SalesOrderDetailID]. TEST_INDX DISABLE ; alter index IX1 on DBO. In order to complete they need a very high level of lock: a schema modification lock (SCH-M). RedDk 31-Aug-13 15:32pm. . ALTER INDEX [myIndex] ON [dbo]. x) and in Azure SQL Database, we recommend using ALTER INDEX REORGANIZE instead of ALTER INDEX REBUILD for columnstore indexes. 1 Answer. If the index has height greater than four, rebuild the index. If we. 索引が自分のスキーマ内にある必要があります。自分のスキーマ内にない場合は、alter any indexシステム権限が必要です。 monitoring usage句を実行する場合は、索引は自分のスキーマ内に存在する必要があります。. object_id = t. Also, an interesting point is that only the leaf level (level=0) gets defrag'ed after doing an ALTER INDEX REORGANIZE - BOL makes this clear. REORGANIZE is your option. Not specifying ONLINE option runs the script with the default value OFF. ALTER INDEX TableDetails_UK0 ON TableDetails REBUILD WITH ( PAD_INDEX=OFF, SORT_IN_TEMPDB=ON. REORGANIZE ), so that’s the topic for this post. The only difference is that I replaced the WAITFOR command (used to wait for the tuple mover to kick in) with an ALTER INDEX REORGANIZE statement. An antimatter column is used to track possible conflicts between the updates and the rebuild (ie. If the response is helpful, please click "Accept Answer" and upvote it. The second part of this tip is intended to reduce the duration for update statistics as it pertains to both. It reorgs indexes when fragmentation is below 30% else it rebuild the index. Eğer merak ettikleriniz olursa bana linkedin hesabımdan ulaşabilirsiniz. Here are a couple of examples. Right-click the index that you want to rebuild online and select Properties. More actions . This tip will explore two features to speed up SQL Server index and statistics maintenance. Index reorganize jobs can be interrupted and can be resumed later at favorable time. REORGANIZE Is on ON LINE operation in ALL flavors of SQL Server. Disabling indexes. The indexes can be reorganized using ALTER INDEX. 그러므로 파일. e. LOB_COMPACTION Compacting large object (LOB) data can reduce the disk space used. This means long-term blocking table locks are not held and queries or updates to the underlying table can continue during the ALTER INDEX REORGANIZE transaction. Qualification Limit for REORGANIZE to remove deleted rows from a rowgroup in Columnstore Index: By default when one runs ALTER INDEX REORGANIZE the qualifying limit to remove delete rows from a rowgroup is --> the specific rowgroup have 10% of the max possible rows in a rowgroup deleted. Right-click the index that you want to modify and then click Properties. By doing the index with ONLINE=ON, you should be able to minimize blocking. Expand the Tables folder. REBUILD Is a BLOCKING operation, unless you have SQL Server Enterprise Edition. Thanks, I will try this next time. More specifically deletes are reflected in the deleted bitmap, which the engine joins with the data and returns the rows visible to your transaction. In ONLINE mode the new index is built while the old index is accessible to reads and writes. Name IS NOT NULL. The maximum length of the parameter string is 1000 characters. If the response is helpful, please click "Accept Answer" and upvote it. Microsoft recommends Index Rebuild operation to defrag indexes if the fragmentation level of your index is greater. The script below allows you to rebuild indexes for all databases and all tables within a database. dm_db_column_store_row_group. Applies to: SQL Server 2012 (11. This caused the system to reorganize or rebuild some indexes even when the indexes weren't much fragmented, which was wasteful. For a dedicated SQL pool table with an ordered CCI, ALTER INDEX REBUILD will re-sort the data using tempdb. If ONLY is specified, only that table is altered. Expand the database table on which you want to rebuild the index online. For all of the column statistics on a partitioned table with a clustered columnstore index, you can just do a one-time conversion by doing something like: SQL. In the Reorganize Indexes dialog box, verify that the correct index is in the Indexes to be reorganized grid and select OK. In the literature, I have read that, for heaps, you can write. Compaction is based on the existing fill. Note that ALTER INDEX REORGANIZE cannot reduce page fullness. Each row is 50 bytes long. Sometimes I noticed that my database experiences high locking and. Online rebuilds generally result in greater residual fragmentation than offline rebuilds. WITH (ONLINE = ON) Drop the existing columnstore index and run the query again. If we then try to reorganize this index. At present we are running that script in SSIS package for all the tables to alter indexes that are necessary to rebuild or reorganize in sequential manner. There was formerly an ALTER INDEX OWNER variant, but this is now ignored (with a warning). In the Rebuild Indexes dialog box, verify that the correct index is in the Indexes to be rebuilt grid and click OK. In other words, the progress of index reorganization cannot be obtained before SQL Server 2008. This job needs to be scheduled and ran on a weekly basis due to large data. If you want to rebuild an index the syntax is below: ALTER INDEX. This removes fragmentation, reclaims disk space by compacting the pages based on the specified or existing fill factor setting. Reorganizing an index is a faster, lightweight version of rebuilding and the indexes remain online. SQL: Procedure for rebuild and reorganize indexes like Microsoft says. Alter Index in PostgreSQL, Oracle, SQL Server. The first part of this tip focuses on SQL Server Enterprise Edition to reduce the duration for index maintenance for off-line rebuilds. For a table with an ordered clustered columnstore index, ALTER INDEX REORGANIZE does not re-sort the data. Pour plus d’informations, consultez Configurer des opérations d’index parallèles. However, I would recommend researching scripts others have written that are well tested and used by. However, sometimes you don't want this, say for read only tables or huge tables. Click the "Tablespaces" link. This functionality benefits from the newly defined Low-Priority queue that contains the processes with priorities. Right-click the index for which you want to set the max degree of parallelism and select Properties. Follow edited Jul 26, 2022 at 15:50. The REORGANIZE operation is always performed online. However, the. ), which reorganizes all the indexes on the. Right-click the index that you want to rebuild online and select Properties. indexes table. Expand the Indexes folder. USE MSSQLTipsDemo GO ALTER INDEX [PK_Product] ON [Production]. Expand the Indexes folder. With the following command: ALTER INDEX [PK_FooDetail] ON [DbName]. you are reading your query result incorrect. You can read more on rebuilding indexes here . Once that is done, it executes the ALTER INDEX command to reorganize the index. –Rebuild/Reorganize indexes on all the tables on a database based on the fragmentation. 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。. Click OK. The ONLINE option is not saved anywhere, it affects only the current statement that creates or rebuilds the index, even though some of the options are saved in sys. On the other hand, if the reorganize operation fails, it will stop where it left off, without rolling back the reorganize operation. For example, consider There are 2 tablesONLINE options in Azure SQL DB, SQL Server 2008+. I cannot say that index reorganize job was the reason for slowness because for me its a light activity. However, the REBUILD still needs to take a lock for a moment to swap the old index for the new index. ALTER INDEX [XPKItem] ON [dbo]. When a clustered index is dropped ONLINE, SQL Server rebuilds the heap two times, once for step 1 and. Right-click the index you want to reorganize and select Rebuild. ALTER INDEX (Transact-SQL) Pređite na glavni sadržaj. Sorted by: 1. In the infrequent cases where you do need to reorganize or re-build index, consider these: Run index maintenance during off peak period. Generates the error…. DBREINDEX = rebuild a copy of the index (es) from scratch. To reduce the number of fragments, reorganize the full-text catalog by using the REORGANIZE option of the ALTER FULLTEXT CATALOGTransact-SQL statement. ----- This article - Optimize index maintenance to improve query performance and reduce resource consumption helps you decide when and how to perform index maintenance. any update on the old index will also get applied to the new index. When you don't explicitly name the constraint / index, a name is auto-generated. Typically if page locks have been disabled on an index there is a really good reason why, so recommending that someone blindly change that. 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:Aug 25, 2022, 4:18 AM. When you rebuild, SQL creates a new fresh index. The reorganization process is blocked when the process tries to move rows to the full file. The length of time the rebuild takes is related to the size of the index, not the amount of fragmentation in it. They can also remove. 3) You cannot also specify the deallocate_unused_clause in this statement. In order to keep the fragmentation ratio of indices low, you should re-organize the indices from time to time on MSSQL. SQL Server 2016 (13. alter index ALL on dbo. Recommendations and examples for indexing tables in dedicated SQL pool in Azure Synapse Analytics. The name (possibly schema-qualified) of an existing index to alter. Indexes created as part of a constraint are dropped when the constraint is dropped. MySQL "plays it safe". The below stored procedure will reorganize the index if the fragmentation is between 10% and 30%. This method can help when Change_tracking is Auto. The Index reorganize operation is a light weight operation that is always performed online in any SQL Server edition and it shouldn’t cause any serious blockings. The fix: Figured out that this cannot be done. 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. Ok i am confused, i was replacing my "alter index reorganize" part with the "execution dbo. Reorganizing an index does not update associate statistics. Executing the query "ALTER INDEX [IX_AttributeInternal_Name] ON [dbo]. Msg 50000, Level 16, State 1, Procedure dbo. ALTER INDEX All ON tableName REORGANIZE; Rebuild or Reorganize SQL Index. Your new index will have the size non less than the size of disabled index. Keep in mind that, depending on the amount of indexed data, a master merge may take some time to complete. In the Indexes folder, expand the file. 2: Syntax: ALTER INDEX ALL ON table_name REBUILD: Syntax: ALTER INDEX ALL ON table_name REORGANIZE: 3: Index should be rebuild when index fragmentation is great than 30% Index should be reorganized when index fragmentation is between 10% to. Please sign in to rate this answer. Too many full-text index fragments in the full-text index, can lead to substantial degradation in query performance. Rebuilding indexes is done using the following statement. The first rebuilds a single index on a table and the second rebuilds all the indexes on the table. If I run the top query again, the index is still listed there with the same level of fragmentation. Table Options. REORGANIZE also optimizes internal index and catalog structures. 15. ALTER INDEX ALL ON dbo. In the Index Properties dialog box, make the desired changes. Everything is the same - configuration, CPU, RAM, disk drive layout, similar (but not the same) database with similar data and workload. がドメイン索引である場合は、 句の有無に関係なく)、 句のみ指定できます。. From the alter index manual page: WITH ( LOB_COMPACTION = { ON | OFF } ) Specifies that all pages that contain large object (LOB) data are compacted. For example, you can add or remove a column from the index key, or change the setting of an index option. Use The ALTER INDEX statement to rebuild an index part of a constraint definition; the constraint doesn't have to be dropped and added again with. ROIR_Test4 REBUILD WITH ( RESUMABLE = ON, ONLINE = ON ); The result is quite sad: Msg 11433, Level 15, State 1, Line 17 'ALTER INDEX ALL' with RESUMABLE option is not. Expand the specific table. You must rebuild each partition or subpartition. On a very busy system, attaining this exclusive lock can sometimes be a problem. When you insert, update, delete, merge, etc. [<table_name>] REORGANIZE How to Reorganize and Rebuild Indexes using SSMS. ". But creating the new partitions through a complete copy of the necessary data, if a crash occurs, the old. Expand the Indexes folder. onemorecoke. [FooDetail] REORGANIZE WITH (LOB_COMPACTION = ON). The Query Optimizer updates statistics when you rebuild an index on a table or view with ALTER INDEX REBUILD or DBCC DBREINDEX, however this statistics update is a byproduct of re-creating. To create a table. Yes. partition_number The number of an existing index partition to rebuild/reorganize. Other conditions, such as small tables, over-partitioned tables, or under-partitioned. Note In SQL Server 2012 (11. Particularly if you are in full recovery. partition_number The number of an existing index partition to rebuild/reorganize. Expand the table or tables and go over the indexes. Click OK. The scripts has some cool features like. x) and later versions. See if you can find the index name either in whatever UI you use for Synapse or by querying the sys. With very large indexes, rebuilds take longer, generate more log, impact performance more while they’re running. Oracle Databaseのインデックスの再作成・変更SQL「alter index」とそのポイントを紹介します。 「alter index」は各種メディアやブログで紹介されており、指定できるパラメータも多くあります。 この記事では初心者向けにインデックスを再作成・変更する時の重要なポイントも合わせて紹介します。 In earlier versions of Microsoft SQL Server it could cause system slowdown to reorganize or rebuild a large index. Expand the table on which you want to reorganize an index. ]index optionsOptions: The options used with this command can be any combination of the. Finally, in case you’re wondering about parallelism and reorganizing indexes…the WITH (MAXDOP = n) option is not available for ALTER INDEX REORGANIZE, as index reorganization is always a single-threaded operation. 1. For more information on ordered clustered columnstore indexes, see Performance tuning with ordered clustered columnstore index. Disable the index. Reorganize the index. It gives you better advantage when tempdb is. Depending on the type of index and the Database Engine version, a rebuild operation can be done offline or online. REORGANIZE operation. 2) The second step is to completely drop the table from the database. If the clustered index is being rebuilt, an exclusive table lock is held. The following example associates the DocumentPropertyList property list with the full-text index on the Production. ON [my]. Oracle maintains the validity of the indexes by rebuilding their leaf and (sometimes. がレンジ・パーティションまたはハッシュ・パーティションである. Possible failure reasons: Problems. Pour plus d’informations, consultez Configurer des opérations d’index parallèles. As the max possible rows in a row. We can see that the command completed successfully with ONLINE=ON. Now, let’s perform the REORGANIZE command on the index using the below T-SQL statement and look at the page allocation again. Running an ALTER PARTITION FUNCTION statement can split one table or index partition that uses the partition function into two partitions. Cancelling / Stopping ALTER INDEX REORGANIZE. ALTER INDEX [IX_beerfilter_FloatTable_DateAndTime] ON [dbo]. So let's say AdventureWorks2014 was 1GB and it's using 100MB space. ALTER INDEX PK_MyFragmentedIndex ON dbo. ) of an existing index, but it doesn't allow changes to the columns that make up the index. The process of reorganizing an index-organized table requires four steps, as shown in the following series of images. ALTER INDEX [PK_FooDetail] ON [DbName]. If you read complete article it was trying to point out the commands or operations in SQL Server which would require additional disk space and others that would not. ALTER INDEX __NAME_OF_INDEX__ ON __NAME_OF_TABLE__ REBUILD. When I detect the index has the option turned off, I perform the following steps: ALTER INDEX REORGANIZE; however, log space is required. An ‘ALTER INDEX REBUILD’ statement was executed on object ‘dbo. REBUILD will not just rebuild index, but also force update of corresponding statistics. There are 3 Columns to look out for 1. Your replica/ mirrors may fall behind. ALTER INDEX REBUILD is an offline operation on Standard Edition in the sense that it requires locks. I have a MSSQL clustered index, which I want to rebuild, since I dropped some columns and I want to free space. If ONLY is not specified, the table and all of its descendant tables (if any) are updated. Your replica/ mirrors may fall behind. Also, some tables/indexes will hardly be fragmented. indexes) [allow_page_locks] is SET to 0. Check total_pages in sys. There was formerly an ALTER INDEX OWNER variant, but this is now ignored (with a warning). Below are steps : 1) Provision an Automation Account if you don’t have any, by going to and select New > Management > Automation Account. 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。. Solution. 5% and < = 30% ALTER INDEX REORGANIZE 30% ALTER INDEX REBUILD WITH (ONLINE = ON)* Reorganize and Rebuild Indexes. Note In SQL Server 2012 (11. The database free space would be reduced to 50MB. Update COLUMNSTORE index in DB transaction. See Online Index Operations. It had been holding exclusive locks for the duration of the ALTER INDEX statement execution. 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. -Search all indexes of a table that have 5% or more of fragmentation and page_count >= 1000. REORGANIZE, UPDATE STATISTICS and a simple SELECT statement. 13. 1 million rows in 11. Index automation job script. ”Reorganizing an index (using the old DBCC INDEXDEFRAG I wrote, or the new ALTER INDEX. Here are a couple of examples. REORGANIZE command (more details on this command and its usage are given below). Rebuild if > 30%. Document table. • DROP INDEX when the user drops a clustered index with offline setting without specifying a MOVE TO clause and there are no non-clustered indexes in the file. resource_subtype, CASE WHEN resource_type =. Right-click the index that you want to modify and then click Properties. The second part is that you can not alter any indexes, this means, that you should DROP the old index and. その他のすべての句は無効です。. Your new index will have the size non less than the size of disabled index. When I run alter index index [IndexName] on dbo. 2 – Two minutes later, a background task is blocked by the index reorganize, waiting to acquire a schema modification lock to update the statistics for the same index. This caused the system to reorganize or rebuild some indexes even. RESUMABLE = ON means you can pause the index. This process doesn’t drop indexes; It physically reorganizes the leaf nodes of the index. This clause specifies the parameter string that is passed uninterpreted to the appropriate ODCI indextype routine. Index automation Job script. The tuple mover has done its job and all row groups are in the compressed state. Whether you rebuild or reorganize indexes depends on the following guidelines: avg_fragmentation_in_percent value Corrective statement. In the Rebuild Indexes. TEST REORGANIZE We get our open delta store again, which will cause locking. Shrinks AdventureWorks2014 to have 50% free space, runs shrinks in 25MB. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance. We are seeing an issue wherein millions of records are deleted from the tables that have column QUERY_BLOB(data type ntext), but the table usage is still the same. Here is another syntax for reorganizing the index. There is some related content on internet about the same problem faced by other users and they all points to permission issue on databases for account which the job was getting executed as. alter index ＜インデックス名＞ reorganize どちらをどのように使い分ければよいか？ これについては、やや古いですが Microsoft のブログにそれぞれの特徴やその使い分けるタイミングについて記載がありました。Also when I try to reorganize or rebuild manually, using one of the following commands: use DBNAME. In Oracle, you can use the Alter Index Rebuild command to rebuild indexes. upvoted 1 times Matt2000 3 months ago I agree. Sorted by: 2. These values provide a rough guideline for determining the point at which you should switch between ALTER INDEX REORGANIZE and ALTER INDEX REBUILD. The equivalent statistics update can be achieved by: UPDATE STATISTICS . Right-click on the index and select Rebuild. So an index reorganize is extremely space efficient, and is one of the reasons I wrote the original DBCC INDEXDEFRAG for SQL Server 2000 (the predecessor of ALTER INDEX.