To reorganize index SQL Server, right-click it & choose Reorganize. REORGANIZE WITH (LOB_COMPACTION = ON) to compact LOB pages of the underlying heap (this will leave the disabled indexes alone); Perform ALTER TABLE . 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。. UPDATE STATISTICS [dbo]. This query creates the necessary ALTER INDEX statements to correct the. See this blog post for details. onemorecoke. To resort the data use ALTER INDEX REBUILD. The ALTER INDEX. In the Rebuild Indexes. BOL: " Reorganize and Rebuild Indexes This topic describes how to reorganize or rebuild a fragmented index in SQL Server 2012 by using SQL Server Management Studio or Transact-SQL. Regards EchoALTER INDEX is in fact just an alias for the forms of ALTER TABLE that apply to indexes. For a dedicated SQL pool table with an ordered CCI, ALTER INDEX REBUILD will re-sort the data using tempdb. sqlの「create index」または「alter table」を使うことで、データベースのテーブルにインデックス（index）を付与することができます。sqlの「create index」または「alter table」を使うことで、テーブルのインデックス（index）を削除することができます。Alter EVENT SESSION [XeMerge] ON SERVER State = START. Here is the script which we used to rebuild the indexes in the TempDB. Expand the table in which the index belongs and then expand Indexes. ALTER INDEX [myIndex] ON [dbo]. x), REORGANIZE hanya digunakan untuk memadatkan grup baris TERTUTUP ke dalam penyimpan kolom. Catatan Di SQL Server 2012 (11. REORGANIZE) more than 30% logical fragmentation, rebuild it. Unlike DBCC INDEXDEFRAG, or ALTER INDEX with the REORGANIZE option, DBCC DBREINDEX is an offline operation. [TableName] REBUILD GO-- Check that only clustered index is enabled SELECT OBJECT_NAME (OBJECT_ID), Name, type_desc, is_disabled FROM. If you have fragmentation, you need to REBUILD or REORGANIZE. Document table. 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. This form of REINDEX cannot be executed inside a transaction block. From the alter index manual page: WITH ( LOB_COMPACTION = { ON | OFF } ) Specifies that all pages that contain large object (LOB) data are compacted. ALTER INDEX ALL ON Adventureworks. before i answer your question is the database on simple recovery. However, ALTER TABLE ignores DATA. What happens when you try to rebuild an index, a Sch-M lock is requested on the object that you're trying to rebuild. Rebuilding an Index. To re-sort data, use ALTER INDEX REBUILD. Reorganize indexes in a table using Transact-SQL. It was trying to do so because when Index is. REBUILD will not just rebuild index, but also force update of corresponding statistics. Follow edited Jul 26, 2022 at 15:50. -Search all indexes of a table that have 5% or more of fragmentation and page_count >= 1000. Table Options. 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. It rebuilds a spatial index or a specified partition of a partitioned index. Ticket'). We can see that the command completed successfully with ONLINE=ON. In this article. One of the blocking scenarios I find most interesting is related to online index rebuilds. This clause specifies the parameter string that is passed uninterpreted to the appropriate ODCI indextype routine. These values provide a rough guideline for determining the point at which you should switch between ALTER INDEX REORGANIZE and ALTER INDEX REBUILD. Below are steps : 1) Provision an Automation Account if you don’t have any, by going to and select New > Management > Automation Account. If the SQL Server crashes and if all the differential backups are bad, when is the latest point in time. We have a maintenance script which analyses the page_count and fragmentation of the indexes and follows the following guideline:-less than 10% logical fragmentation, don’t do anything; between 10% and 30% logical fragmentation, reorganize it (using ALTER INDEX. ALTER INDEX All ON tableName REBUILD; This drops the index and recreates it, removing fragementation, reclaims disk space and reorders index pages. REORGANIZE WITH (LOB_COMPACTION = ON) to compact LOB pages of the underlying heap (this will leave the disabled indexes alone); Perform ALTER TABLE . Follow edited Dec 16, 2020 at 8:43. The index fragmentation level can be found using the sys. object_id = t. Are there any advantages or disadvantages to using " UPDATE STATISTICS (Index name) " as opposed to "ALTER INDEX (index name) ON. ALTER INDEX TableDetails_UK0 ON TableDetails REBUILD WITH ( PAD_INDEX=OFF, SORT_IN_TEMPDB=ON. Let us try to rebuild the columnstore index online in SQL Server 2017 and SQL Server 2019. There are 3 Columns to look out for 1. Index Rebuild vs Index Reorganize. [TableName] REBUILD GO-- Check that only clustered index is enabled SELECT OBJECT_NAME (OBJECT_ID), Name, type_desc, is_disabled FROM sys. The reorganization process is blocked when the process tries to move rows to the full file. If you want to rebuild an index the syntax is below: ALTER INDEX. DROP INDEX when you are dropping a nonclustered index. Disabling indexes. Syntax: ALTER INDEX [schema. The REORGANIZE operation is always performed online. ¿ Rebuild indexes online. Expand the table on which you want to reorganize an index. I suspect the reorganize is compacting the index after the rebuild and thus moving quite a bit of data around. Restrictions: 1) You cannot rebuild an index on a temporary table. ALTER INDEX with WAIT_AT_LOW_PRIORITY. ALTER INDEX . Yes it looks like some smaller tables but. For descriptions of all table options, see Section 13. SQL accepts the challenge of sorting the leaf-level pages in the. IndexOptimize is the SQL Server Maintenance Solution’s stored procedure for rebuilding and reorganizing indexes and updating statistics. So you should explicitly set a deadlock priority, and perhaps a retry loop, to enforce the behavior and document it. This form of REINDEX cannot be executed inside a transaction block when used with a partitioned index. • ALTER INDEX REORGANIZE, But the user needs to use log space. I'm modifying our index reorg/rebuild process to be sensitive to indexes that have ALLOW_PAGE_LOCKS turned OFF. . SQL Server 2019 adds resumable online index creation, and it’s pretty spiffy: Transact-SQL. It gives you better advantage when tempdb is. In this example, disk space requirements to create a clustered index are determined. Rebuilding indexes is done using the following statement. 1) The first step is to export the data from the index-organized table. Generally when we need to check fragmentation we use the DB_ID with Detailed mode. For an [!INCLUDEssazuresynapse-md] table with an ordered clustered columnstore index, ALTER INDEX REORGANIZE does not re-sort the data. The final post in this series will cover parallelism and the UPDATE STATISTICS command, and if. The first rebuilds a single index on a table and the second rebuilds all the indexes on the table. DBREINDEX will always defragment as clean copies are made whereas INDEXDEFRAG churns pages. So your db need to have: data space to accomodate your new index, data space to make a sort since you used SORT_IN_TEMPDB = OFF, and it needs log to be large. The tablespace to which the index will be moved. Here are a couple of examples. Right-click the index and choose rebuild and then reorganize. Changing the table's owner automatically changes the index as well. ;WITH cte AS ( SELECT object_id, index_id, partition_number, rows, ROW_NUMBER () OVER (PARTITION BY object_id, index_id, partition_number. Wednesday, December 26, 2012 - 3:13:45 PM - Christina: Back To Top (21140) I need to loop the following script through all databases. Use the ReorganizeIndex Task dialog to move index pages into a more efficient search order. Changing the table's owner automatically changes the index as well. It is a more online-ish compared to rebuild. In this article. Disabling an index prevents user access to the index, and for clustered indexes, to the underlying table data. indexes system view, filtering the object_id column on the OBJECT_ID('dim. The name (possibly schema-qualified) of an existing table to alter. INDEX. This prevents modifications to the table. The following index operations require no additional disk space: ALTER INDEX REORGANIZE; however, log space is required. On this MSDN Page it says if you should reorganize or rebuild based on the amount of fragmentation:. Enterprise Manager gives us a nice image of the contents of the tablespace by doing the following: Click on the "Server" tab. a) if possible. For a table with an ordered clustered columnstore index, ALTER INDEX REORGANIZE does not re-sort the data. Recommendations and examples for indexing tables in dedicated SQL pool in Azure Synapse Analytics. Our Production instance is running SQL Server 2014. 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. Make sure the DB recovery mode is SIMPLE. In SQL Server, you can use ALTER INDEX with the REORGANIZE or REBUILD option. [dbo]. Master merging a large amount of data can create a long running transaction, delaying truncation of the transaction log during checkpoint. " I'm modifying our index reorg/rebuild process to be sensitive to indexes that have ALLOW_PAGE_LOCKS turned OFF. • 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. To re-sort data, use ALTER INDEX REBUILD. table_options signifies table options of the kind that can be used in the CREATE TABLE statement, such as ENGINE, AUTO_INCREMENT, AVG_ROW_LENGTH, MAX_ROWS, ROW_FORMAT, or TABLESPACE. The higher the degrees of parallelism, the greater the memory. Compressed rowgroups - Rowgroups are using columnstore compression. Querying sys. [dbo]. An antimatter column is used to track possible conflicts between the updates and the rebuild (ie. 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’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. If the response is helpful, please click "Accept Answer" and upvote it. TABLE. if the index has: less than 5% logical fragmentation, don’t do anything; between 5% and 30% logical fragmentation, reorganize it (using DBCC INDEXDEFRAG or ALTER INDEX. An index rebuild will always build a new index, even if there’s no fragmentation. So much for “index. REBUILD) These numbers are made up. However, ALTER TABLE ignores DATA. ALTER. You can optionally specify * after the table name to explicitly indicate that descendant tables are included. ALTER INDEX. or to reorganize use: ALTER INDEX __NAME_OF_INDEX__ ON __NAME_OF_TABLE__ REORGANIZE. Applies to: SQL Server 2012 (11. Check the new table size using sp_spaceused "tablename". If the table (or rather: index) is partitioned, then you could consider rebuilding at partition level. Expand the database table on which you want to rebuild the index online. This browser is no longer supported. 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. What is index fragmentation, and why is it a concern?Index fragmentation occurs when data pages within an index are disordered or scattered. Index rebuilds are only mostly online. x) y SQL Server 2014 (12. Cancelling / Stopping ALTER INDEX REORGANIZE. You could also refer another query which may be helpful to you. ALTER INDEX . #1258597. Expand the table on which you want to reorganize an index. Just for extra noise, Azure Backup is taking. 20, “CREATE TABLE Statement”. alter index reorganize を使用してこれらの行グループを列ストアに強制的に変換した後、小さい圧縮された行グループを、より大きい圧縮された行グループに結合できます。 再構成操作では、削除対象としてマークされた行も、列ストアから削除されます。1 – Index reorganize starts from a SQL Agent job. Lock durations are short and will cause minimal blocking of queries. When we cancel the index rebuild, we need. Reorganize is. DBREINDEX = rebuild a copy of the index (es) from scratch. 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. and even. Reorganizing an index only deals with the fragmentation that exists, and the more fragmentation there is, the longer a reorganize will take. SELECT 'ALTER INDEX all ON ' + name + ' REORGANIZE;' + CHAR(10) + 'ALTER INDEX all ON ' + name + ' REBUILD;' FROM sys. Please help me. Right-click the index that you want to modify and then click Properties. You must rebuild each partition or subpartition. It can only be fixed by doing an ALTER INDEX. IndexOptimize is supported on SQL Server 2008, SQL Server 2008 R2, SQL Server 2012, SQL Server 2014, SQL Server 2016, SQL Server 2017, SQL Server 2019, SQL Server 2022, Azure SQL Database, and Azure SQL. We can however get it back to a compressed segment by issuing the following command we saw previously. Acest browser nu mai este acceptat. It creates a table that has multiple rowgroups, and then demonstrates how REORGANIZE merges the rowgroups. Designing the SQL Server Reorganize Index Task Perform ALTER INDEX ALL . By doing the index with ONLINE=ON, you should be able to minimize blocking. The MSDN ALTER INDEX page says "An index cannot be reorganized when ALLOW_PAGE_LOCKS is set to OFF. Name + ' ON ' + T. Team, My Rebuild,Reorganize index job has been failing because of the following error,it is scheduled to be executed in only one db and the db is in simple mode. Partitions can be rebuilt individually. however, if we disable the index , rebuild with compression and then rebuild again: alter index IX1 on DBO. Yes. Improve this answer. The indexes can be reorganized using ALTER INDEX. 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. Check total_pages in sys. When we cancel the index rebuild, we need. IndexOptimize is the SQL Server Maintenance Solution’s stored procedure for rebuilding and reorganizing indexes and updating statistics. No, there is no auto-magical defragging of indexes. TEST_INDX DISABLE ; alter index IX1 on DBO. ALTER INDEX index1 ON dbo. On a very busy system, attaining this exclusive lock can sometimes be a problem. This removes fragmentation, reclaims disk space by compacting the pages based on the specified or existing fill factor setting. Here is another syntax for reorganizing the index. Ok i am confused, i was replacing my "alter index reorganize" part with the "execution dbo. Note that ALTER INDEX REORGANIZE cannot reduce page fullness. Method 2: Set Change_Tracking to Manual, by using the following command: ALTER FULLTEXT INDEX ON table_name. Note In SQL Server 2012 (11. In SQL Server, the ALTER INDEX statement is used to modify an existing index. The DBCC REINDEX command was deprecated in a previous version so it is not as robust as the new ALTER INDEX command is today. dm_db_index_physical_stats. I have a MSSQL clustered index, which I want to rebuild, since I dropped some columns and I want to free space. GO. The script which they were using to rebuild indexes, they had to add only keywords WITH (SORT_IN_TEMPDB = ON) at the end of the same. ALTER INDEX [ix_EvtRowChksum] ON [WinPerfDataSQL]. Each row is 50 bytes long. ALTER INDEX [PK_SalesOrderDetailEnlarged_SalesOrderID_SalesOrderDetailID] ON [Sales]. The maximum length of the parameter string is 1000 characters. Then issue some transaction log backups, next a differential backup, followed by more transaction log backups, then another differential and finally some transaction log backups. 3. ----- This article - Optimize index maintenance to improve query performance and reduce resource consumption helps you decide when and how to perform index maintenance. Otherwise you're holding an exclusive lock on the table/partition before you start the reorganize. Under Select a page, select Options. Yes. When I detect the index has the option turned off, I perform the following steps:ALTER INDEX REORGANIZE; however, log space is required. Starting with SQL Server 2016 (13. indexes I LEFT OUTER JOIN sys. ALTER INDEX IndexName ON TableName REBUILD; It is a very simple syntax. Rebuilding or reorganizing small indexes (which has 128 or less extents) often does not reduce fragmentation. ----- This article - Optimize index maintenance to improve query performance and reduce resource consumption helps you decide when and how to perform index maintenance. They can also remove. Preuzimanje pregledača Microsoft Edge Više. Click OK. Instead, an index rebuild must be performed. July 7, 2010 at 7:39 pm #1189953 . TEST_INDX REBUILD WITH (DATA_COMPRESSION = PAGE); alter index IX1. SQL Server ALTER INDEX Syntax. Also, if you have tempdb properly tuned, look into using. REORGANIZE ), so that’s the topic for this post. The reorganize process reorganizes the leaf nodes of the index physically to match it with the logical order, this physical order matching the logical order improves the performance of index scans. Scale back down once the index rebuild is complete. index_id > 0 -- Indexes. A partir SQL Server 2016 (13. Index Rebuild operation first drops and then recreates the index. While that might allow ALTER INDEX REORGANIZE to run, it could also introduce any number of other problems into the environment that are worse than not being able to simply reorganize an index. But creating the new partitions through a complete copy of the necessary data, if a crash occurs, the old. Expand the table or tables and go over the indexes. For an [!INCLUDEssazuresynapse-md] table with an ordered clustered columnstore index, ALTER INDEX REORGANIZE does not re-sort the data. I want to reorganize or rebuild indexes. REORGANIZE. ALTER INDEX ON REORGANIZE . The database has READ_COMMITTED_SNAPSHOT enabled. REORGANIZE, UPDATE STATISTICS and a simple SELECT statement. [Table_Name] REBUILD WITH (FILLFACTOR = 80) OR - by using. Tablename rebuild with (online=on). indexstats. More specifically deletes are reflected in the deleted bitmap, which the engine joins with the data and returns the rows visible to your transaction. 4 Answers. ALTER INDEX [indexName] ON tableName REORGANIZE. Rebuild the index. You can optionally specify * after the table name to explicitly indicate that descendant tables are included. From the documentation: “When a clustered index is dropped OFFLINE, only the upper levels of clustered indexes are removed; therefore, the operation is quite fast. x) and in Azure SQL Database, we recommend using ALTER INDEX REORGANIZE instead of ALTER INDEX REBUILD for columnstore indexes. RedDk 31-Aug-13 15:32pm. After trying each the above options, I tried scripting the index as a Create statement and I don't see the MAXDOP option in the script. [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. There was formerly an ALTER INDEX OWNER variant, but this is now ignored (with a warning). (and even with the Enterprise Edition, is blocking when rebuilding clustered indexes) If the above is all correct, the question is: During an ALTER INDEX. Too many full-text index fragments in the full-text index, can lead to substantial degradation in query performance. References: QUESTION 39 You administer a Microsoft SQL Server database named Sales. Expand the Indexes folder. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. 1 million rows in 11. I don't agree with Kin this is a knee response that will be a least help. ALTER INDEX PK_MyFragmentedIndex ON dbo. So your db need to have: data space to accomodate your new index, data space to make a sort since you used SORT_IN_TEMPDB = OFF, and it needs log to be large. I manually fired reorganize index (ALTER INDEX cci_myindex ON dbo. Document table. Also, since this is a non-clustered index, you could drop and then create the index. This job needs to be scheduled and ran on a weekly basis due to large data. Eğer merak ettikleriniz olursa bana linkedin hesabımdan ulaşabilirsiniz. One can also. ALTER INDEX CCI_fact_Sale_CCI_ORDERED ON Fact. SSC Guru. Prijeđite na Microsoft Edge, gdje vas čekaju najnovije značajke, sigurnosna ažuriranja i tehnička podrška. DECLARE @Database VARCHAR (255) DECLARE @Table VARCHAR (255) DECLARE @cmd NVARCHAR (500) DECLARE @fillfactor INT. sakuraime 2,311. DROP INDEX when you are dropping a clustered index offline without specifying the MOVE TO clause and nonclustered indexes do not exist. The problem I’ve been seeing is people rebuilding indexes and then updating statistics. 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。. Designing efficient indexes is paramount to achieving good database and application performance. 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. The code first adds 1. In order to keep the fragmentation ratio of indices low, you should re-organize the indices from time to time on MSSQL. Your replica/ mirrors may fall behind. Please see this below chart for lock compatibility:. alter index all on dbo. Hi, if you need to set a different fillfactor for a specific group of tables I think you could duplicate your existing script to manage two different sets of tables, the first to set for example. It can only be fixed by doing an ALTER INDEX. 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. ALTER INDEX [IX_beerfilter_FloatTable_DateAndTime] ON [dbo]. If you need to modify the properties of an index or reorganize or rebuild an index, you can use ALTER INDEX as follows. 1. Modify an existing index on a table or view. [CompletedEventText] REORGANIZE. partition_number The number of an existing index partition to rebuild/reorganize. DECLARE @Statement. MySQL "plays it safe". Downtime required. First, we will start the index reorganization in a session using the following T-SQL code. ) REORGANIZE statement. If you have any question, please feel free to let me know. There are scripts out there that will go though and reorganize verses rebuild versus skip. Reorganizing an index uses minimal system resources and also compacts the index pages. REORGANIZE or REBUILD (as suggested already). x), you can create nonclustered B-tree or rowstore indexes as secondary indexes on a clustered columnstore index. Syntax ALTER INDEX index_name ON table_name. Otherwise you're holding an exclusive lock on the table/partition before you start the reorganize. In. VeryImportantTable REBUILD; GO The second method is to reorganize indexes. 環境SQL Server 2012参考前回の以下の投稿に若干手を加えて作成しました。SQL Server の指定したテーブルのインデックス名を取得する方法ストアドプロシージャを実装するC…There are several options available to help reduce the problems you're seeing: /* set the LOCK_TIMEOUT value to the maximum number of milliseconds you want to wait for the ALTER INDEX REBUILD to start */ SET LOCK_TIMEOUT 100; /* this tells SQL Server our ALTER INDEX REBUILD statement should be the deadlock victim */ SET. 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. With the given configuration of process affinity, a very low-cost threshold of parallelism, and an appropriate maximum degree of parallelism, SQL Server will utilize two cores to build this index. Oracle maintains the validity of the indexes by rebuilding their leaf and (sometimes. 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. Syntax ALTER INDEX index_name ON table_name. For more information, see Data Types (Transact-SQL). The indexes can be reorganized using ALTER INDEX. In other words, the progress of index reorganization cannot be obtained before SQL Server 2008. The name of the extension that the index is to depend on. Mar 8, 2021, 2:47 PM. More actions . And if the reorganize is a deadlock. Faceți upgrade la Microsoft Edge pentru a profita de cele mai noi funcții, actualizări de securitate și asistență tehnică. 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. Below the last two rows that displays the fail: Source: Reorganize Index Executing query "ALTER INDEX [Stack Exchange Network. It. If the response is helpful, please click "Accept Answer" and upvote it. So in order to fix my issue I went ahead and rebuild my index which fixed the issue. REORGANIZE index. But, fill factor is defined in index properties, and is not overriden in index rebuild settings, so I believe both operations should respect the value. Reorganize has some advantages and disadvantages, due to the way it works… and it works completely different compared to the index rebuild operation. If ONLY is specified, only that table is altered. You can also change this threshold via parameters. 4) The final step is to reload the data back. I used the sp_who2 procedure to see which queries were waiting, and which other query they were blocked by. 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。. If you run the query above, that gets information from the Dynamic Management Objects, and the index rebuild and reorganizations are running you will see information like this for the statement that is currently executing. Rebuild the Indexes if the Fragmentation level is > 30%. Each row is 200 bytes long. allocation_units. However, sometimes you don't want this, say for read only tables or huge tables. If the fragmentation of an index is more than 20% then we can try rebuilding that index: ALTER INDEX Index_Name ON [Database_name]. The script below allows you to rebuild indexes for all databases and all tables within a database. 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. . alter index reorganize を実行すると、lob_compaction の有無に関係なく、並列処理の最大限度の値は単一スレッドの操作になります。 詳細については、「 並. If the clustered index is being rebuilt, an exclusive table lock is held. After that I ended. ". The total fragmentation value will be displayed. REORGANIZE is your option. Reorganize the index. The second part of this tip is intended to reduce the duration for update statistics as it pertains to both. If you truncate a table, all indexes will be USABLE but empty. See if you can find the index name either in whatever UI you use for Synapse or by querying the sys. . This will rebuild/reorganize indexes based on configurable thresholds and options. Using the REBUILD or REORGANIZE options of the ALTER FULLTEXT CATALOG statement. 15. 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. REBUILD will not just rebuild index, but also force update of corresponding statistics. You can read more on rebuilding indexes here . Like the tests above the initial start point is as per the second screenshot above. Your replica/ mirrors may fall behind. Our Production instance is running SQL Server 2014. First, make sure you're checking index fragmentation and only rebuilding indexes that actually need it. ALTER INDEX. table1 REBUILD WITH (ONLINE=ON ,SORT_IN_TEMPDB =. 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. But short answer is that you want to look at ALTER TABLE. Once that is done, it executes the ALTER INDEX command to reorganize the index. In the Rebuild Indexes dialog box, verify that the correct index is in the Indexes to be rebuilt grid and click OK.