m. The nonclustered B. Ovaj preglednik više nije podržan. On a very busy system, attaining this exclusive lock can sometimes be a problem. I got no errors, but I still have fragmentation. Columnstore supports index defragmentation by removing deleted rows without the need to explicitly rebuild the index. Session 61: executing a select on the rebuilt table SELECT TOP 1 * FROM ExecQueryWaitStats. There are scripts out there that will go though and reorganize verses rebuild versus skip. 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. The new name for the index. [GerardStatsTest] WITH RESAMPLE, INCREMENTAL=ON; This will make all of the statistics incremental statistics. Because this is an online operation, the index is available while the statement is running. SQL Server 2019 adds resumable online index creation, and it’s pretty spiffy: Transact-SQL. Rebuild INDEX sort in tempdb. This caused the system to reorganize or rebuild some indexes even. It defragments the leaf level of clustered and nonclustered indexes on tables and views by physically reordering the leaf-level pages to match the. ALTER INDEX ALL ON Adventureworks. gif」の説明. With the following command: ALTER INDEX [PK_FooDetail] ON [DbName]. The default is ON. Enterprise Manager gives us a nice image of the contents of the tablespace by doing the following: Click on the "Server" tab. ]index optionsOptions: The options used with this command can be any combination of the. 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. indexes system view, filtering the object_id column on the OBJECT_ID('dim. –Rebuild/Reorganize indexes on all the tables on a database based on the fragmentation. Next, let us build only the clustered index and see the output of all the indexes. Faceți upgrade la Microsoft Edge pentru a profita de cele mai noi funcții, actualizări de securitate și asistență tehnică. The script below allows you to rebuild indexes for all databases and all tables within a database. So let's say AdventureWorks2014 was 1GB and it's using 100MB space. 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. TEST REORGANIZE We get our open delta store again, which will cause locking. When a clustered index is dropped ONLINE, SQL Server rebuilds the heap two times, once for step 1 and. Here are a couple of examples. In this example, disk space requirements to create a clustered index are determined. ALTER INDEX with WAIT_AT_LOW_PRIORITY. x) y SQL Server 2014 (12. Both are deprecated in favour of ALTER INDEX where. ----- This article - Optimize index maintenance to improve query performance and reduce resource consumption helps you decide when and how to perform index maintenance. Index Reorganize is a useful operation when your fragmentation is below 20-30 %, you do not need to change the original fill factor of your index and you are planning on doing index statistics update at a later point in time. The Reorganize Index task encapsulates the Transact-SQL ALTER INDEX statement. And if the reorganize is a deadlock. It can only be fixed by doing an ALTER INDEX. Yes, rebuilding indexes will take a toll on your transaction log file. REORGANIZE command (more details on this command and its usage are given below). SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER OFF GO /* TIPO DO OBJETO. Select Options under Select a page. Everything is the same - configuration, CPU, RAM, disk drive layout, similar (but not the same) database with similar data and workload. ALTER INDEX [NameOfTheIndex] ON [SchemaName]. So why is this a problem? Well, it depends :-)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. One of the major reasons I wrote DBCC INDEXDEFRAG for SQL Server 2000 was as an online alternative to DBCC DBREINDEX. Compressed rowgroups - Rowgroups are using columnstore compression. Disabling an index prevents user access to the index, and for clustered indexes, to the underlying table data. In fact, if an index is UNUSABLE the truncate will actually mark it as USABLE by the very fact that it knows there are no rows. It is causing other queries to wait, even simple ones like: SELECT * FROM tableName WHERE indexedColumn = @value. Of course, they are head blockers (because it is Standard Edition, each ALTER INDEX command runs with ONLINE=OFF). marc_s. Reorganize only requires 8KB of additional space in the database. 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. If the table (or rather: index) is partitioned, then you could consider rebuilding at partition level. CREATE UNIQUE NONCLUSTERED INDEX (indexname) ON dbo. This caused the system to reorganize or rebuild some indexes even when the indexes weren't much fragmented, which was wasteful. 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. Thanks for your. extension_name. REORGANIZE) more than 30% logical fragmentation, rebuild it (using DBCC DBREINDEX or ALTER INDEX. Also trying to avoid logging to transaction log and log growth, and. 前提条件 . SQL Server ALTER INDEX Syntax. UPDATE STATISTICS [dbo]. Right-click the index and choose rebuild and then reorganize. For a table with an ordered clustered columnstore index, ALTER INDEX REORGANIZE does not re-sort the data. This should not take long on a table with only 400 000 rows but it is. For a table with an ordered clustered columnstore index, ALTER INDEX REORGANIZE does not re-sort the data. > 30% ALTER INDEX REBUILD WITH (ONLINE = ON)*. There's a difference between REORGANIZE and REBUILD. Table Options. b) ALTER INDEX {indexname} ON {tablename} DISABLE; 2) Truncate Table. The first and most popular method is to rebuild indexes. ALTER INDEX All ON tableName REBUILD; This drops the index and recreates it, removing fragementation, reclaims disk space and reorders index pages. Reorganizing an index defragments the leaf level of an index by physically re-ordering pages to match the logical order. Check total_pages in sys. ". Querying sys. However, the actual values may vary from case to case. [dbo]. Then, drag and drop Rebuild Index Task into the maintenance plan designer. I cannot say that index reorganize job was the reason for slowness because for me its a light activity. ALTER INDEX TableDetails_UK0 ON TableDetails REBUILD WITH ( PAD_INDEX=OFF, SORT_IN_TEMPDB=ON. Name + ' SET (ALLOW_PAGE_LOCKS = ON)' As Command FROM sys. #1592569. The MSDN ALTER INDEX page says "An index cannot be reorganized when ALLOW_PAGE_LOCKS is set to OFF. Run this command: 1. The first rebuilds a single index on a table and the second rebuilds all the indexes on the table. Unfortunately, there is no way to run a partial organize (the way you can partially shrink a log file for example). Note that ALTER INDEX REORGANIZE cannot reduce page fullness. column_name DISABLE; ALTER INDEX index_name ON table_name. ) Then rerun the above free-space query again to see how the shrink worked: Free space after. too slow alter index reorganize/rebuild (with online) I have 2 similar SQL Server installations on 2 similar GCP projects. any update on the old index will also get applied to the new index. I have an index rebuild and reorganize script to alter rebuild or alter reorganize based on fragmentation in SQL Server. 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. Reorganizing should be used at lower (<30%) fragmentations but only rebuilding (which is heavier to the database) cuts the fragmentation down to 0%. 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. In the Indexes folder, expand the file. In order to keep the fragmentation ratio of indices low, you should re-organize the indices from time to time on MSSQL. a) Leave clustered indexes enabled - or you can't access the table. 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. 1 Answer. . ALTER INDEX [XPKItem] ON [dbo]. Expand the table in which the index belongs and then expand Indexes. 3. Expand the database table on which you want to rebuild the index online. Improve this answer. x) and in Azure SQL Database, we recommend using ALTER INDEX REORGANIZE instead of ALTER INDEX REBUILD for columnstore indexes. Wednesday, December 26, 2012 - 3:13:45 PM - Christina: Back To Top (21140) I need to loop the following script through all databases. ) REORGANIZE statement. You need to assemble the SQL prior to calling SP_ExecuteSQL, i. REBUILD WITH (FILLFACTOR = 90); ALTER INDEX AK_SalesOrderHeader_SalesOrderNumber ON Sales. If index is a local index. From the alter index manual page: WITH ( LOB_COMPACTION = { ON | OFF } ) Specifies that all pages that contain large object (LOB) data are compacted. In this article. 図「key_compression. • ALTER INDEX REORGANIZE, But the user needs to use log space. In PostgreSQL, ALTER INDEX command changes the definition of an existing index. To re-sort data, use ALTER INDEX REBUILD. What happens when you try to rebuild an index, a Sch-M lock is requested on the object that you're trying to rebuild. Right-click the index that you want to rebuild online and select Properties. 1 million rows in 11. You must rebuild each partition or subpartition. Microsoft describes in the link below how you can check the fragmentation of indices on tables in MSSQL and then how you can re-organize (re-build) the indices to reduce the fragmentation percentage. ALTER INDEX (Transact-SQL)ALTER INDEX IX_Orders_OrderID ON Orders REBUILD; Reorganize Index: Reorganizing an index only reorganizes the physical order of the index pages to reduce fragmentation and improve performance but does not completely rebuild the index. If I run the top query again, the index is still listed there with the same level of fragmentation. 1. Reparaciones rebuild sql; sql-server; Share. They work differently toward the same end. Update COLUMNSTORE index in DB transaction. If you need more tempdb space, scale up the pool. REORGANIZE is your option. However, ALTER TABLE ignores DATA. Expand the Indexes node. 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. 5% and < = 30% ALTER INDEX REORGANIZE 30% ALTER INDEX REBUILD WITH (ONLINE = ON)* Reorganize and Rebuild Indexes. For an [!INCLUDEssazuresynapse-md] table with an ordered clustered columnstore index, ALTER INDEX REORGANIZE does not re-sort the data. When I run alter index index [IndexName] on dbo. ALTER INDEX IXCS_Test ON [DBTest]. We would like to show you a description here but the site won’t allow us. The MAXDOP index option cannot be specified in the ALTER INDEX (. To work around this limitation perform an ALTER INDEX REBUILD instead of ALTER INDEX REORGANIZE or increase the file growth limit of any files that are full. I am using the following to rebuild the index. This prevents modifications to the table. [Product] SET ( ALLOW_PAGE_LOCKS = ON ) ALTER INDEX [PK_Product] ON [Production]. partition_number The number of an existing index partition to rebuild/reorganize. ALTER INDEX All ON tableName REORGANIZE; Rebuild or Reorganize SQL Index. When you insert, update, delete, merge, etc. Right-click the index you want to reorganize and select Reorganize. For a table with an ordered clustered columnstore index, ALTER INDEX REORGANIZE does not re-sort the data. GO. " I'm modifying our index reorg/rebuild process to be sensitive to indexes that have ALLOW_PAGE_LOCKS turned OFF. below line will remove the NULL value from the query. Thanks, I will try this next time. SELECT 'ALTER INDEX ' + I. These values provide a rough guideline for determining the point at which you should switch between ALTER INDEX REORGANIZE and ALTER INDEX REBUILD. My_Table REBUILD WITH (ONLINE = ON , MAXDOP = 1, RESUMABLE = ON) Which executes successfully but doesn't seem to do anything. Alter Index in PostgreSQL, Oracle, SQL Server. Changing the table's owner automatically changes the index as well. #1637994. • DROP INDEX only when the user drops a non-clustered index. REBUILD) and reorganizing an index (using ALTER INDEX. Under Select a page, select Options. ) of an existing index, but it doesn't allow changes to the columns that make up the index. Because the data_compression option is not retained when scripting out the Index create statement. It is documented that you can rebuild the index ONLINE for those indexes which has LOB columns as the index key. If you have any question, please feel free to let me know. REORGANIZE statement removes deleted rows, based on an internally defined policy, from the columnstore as an online operation. 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. Expand the table on which you want to reorganize an index. indexes) [allow_page_locks] is SET to 0. Sorted by: 1. Keep in mind that, depending on the amount of indexed data, a master merge may take some time to complete. The rebuild can be resumed later after the previously completed partition number. ALTER INDEX __NAME_OF_INDEX__ ON __NAME_OF_TABLE__ REBUILD. 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. The code first adds 1. Nonclustered index A contains 1 million rows. Hi, The widely used thresholds are: Reorganize if fragmentation is between 10-30%. There were questions regarding which indexes are actually rebuild touched and what are not. REBUILD. REBUILD to rebuild the in-row data of the heap, as well as all data of the indexes, and re-enable them. Here is the syntax for the same. ALTER INDEX ON REORGANIZE . On the other hand, if the reorganize operation fails, it will stop where it left off, without rolling back the reorganize operation. Pour plus d’informations, consultez Configurer des opérations d’index parallèles. x), REORGANIZE solo se usa para comprimir los grupos de filas CLOSED en el almacén. If the response is helpful, please click "Accept Answer" and upvote it. This statement essentially merges all the fragments. Because there are so many of them running at a time (each in a different database), and they are going parallel (which ties up even more workers), everything piles up. In this article. For a dedicated SQL pool table with an ordered CCI, ALTER INDEX. When we cancel the index rebuild, we need. As you can see the percent_complete tells us that this process is 22% complete along with the estimated completion time. Expand the table on which you want to reorganize an index. 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. Click OK. ALTER INDEX [indexName] ON tableName REORGANIZE. Reorganizing also compacts the index pages. VeryImportantTable REBUILD; GO -- If you want to rebuild all the indexes on a table, try this code. [TableName] REBUILD GO-- Check that only clustered index is enabled SELECT OBJECT_NAME (OBJECT_ID), Name, type_desc, is_disabled FROM sys. 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. Changing the table's owner automatically changes the index as well. So you should explicitly set a deadlock priority, and perhaps a retry loop, to enforce the behavior and document it. Rename the task to Index. First, make sure you're checking index fragmentation and only rebuilding indexes that actually need it. Poorly designed indexes and a lack of indexes are primary sources of database application bottlenecks. Generally when we need to check fragmentation we use the DB_ID with Detailed mode. 277 4 4 silver badges 12 12 bronze badges. 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. The following index operations require no additional disk space: ALTER INDEX REORGANIZE; however, log space is required. References: QUESTION 39 You administer a Microsoft SQL Server database named Sales. . In general, a common plan for index maintenance is as follows: Perform an index reorganization with the compress_all_row_groups option on after any large data load, or on a semi-regular basis. TABLE. The tuple mover has done its job and all row groups are in the compressed state. Open the Tables folder & expand it. asked Jul 26, 2022 at 12:55. new_name. DECLARE @Statement. avg_fragmentation_in_percent >5% and <=30% do Reorganize index >30% do Rebuild index you can get fragmetation % from sys. This form of REINDEX cannot be executed inside a transaction block. The name (possibly schema-qualified) of an existing index to alter. Index Rebuild operation first drops and then recreates the index. Ok i am confused, i was replacing my "alter index reorganize" part with the "execution dbo. Lock durations are short and will cause minimal blocking of queries. To re-sort data, use ALTER INDEX REBUILD. The first rebuilds a single index on a table and the second rebuilds all the indexes on the table. We choose "All databases, leave the default values of two other options and click "OK". Rebuild the Indexes if the Fragmentation level is > 30%. If you truncate a table, all indexes will be USABLE but empty. The second part of this tip is intended to reduce the duration for update statistics as it pertains to both. ALTER INDEX [PK_SalesOrderDetailEnlarged_SalesOrderID_SalesOrderDetailID]. Unlike DBCC INDEXDEFRAG, or ALTER INDEX with the REORGANIZE option, DBCC DBREINDEX is an offline operation. In SQL Server 2017, first, create the index without the online option. You may try. Therefore, you do not need to update statistics after performing ALTER INDEX REBUILD, DBCC DBREINDEX, DBCC INDEXDEFRAG, or ALTER INDEX REORGANIZE operations. x), use ALTER INDEX. When I run a maintenance plan to reorganize and rebuild tables indexes, it fails. Rebuilding an index drops and re-creates the index. Reorganizing an index does not update associate statistics. 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. Hi Team, I am looking for a script, which can provide defrag status and generate rebuild and reorganize scripts ALTER statement in Azure SQL DB. A more intelligent way is to check fragmentation first then rebuild or reorganise. indexes Ok i am confused, i was replacing my "alter index reorganize" part with the "execution dbo. If you need to modify the properties of an index or reorganize or rebuild an index, you can use ALTER INDEX as follows. 000). DBREINDEX = rebuild a copy of the index (es) from scratch. This browser is no longer supported. The ALTER INDEX statement in SQL Server (see docs) is available to alter certain properties (storage properties etc. For the 'best possible' results REBUILD offline, with MAXDOP = 1, and SORT_IN_TEMPDB = ON. I suspect the reorganize is compacting the index after the rebuild and thus moving quite a bit of data around. The below stored procedure will reorganize the index if the fragmentation is between 10% and 30%. We have shrunk the files, rebuild indexes using the offline option on those tables, but still unable to see any free space that is released. Copy and paste the following example into the query window and select Execute. Since ONLINE rebuild is not an oprion for you (Enterprise only and you are on Standard), ALTER INDEX. Reorganize indexes in a table using Transact-SQL. The second part is that you can not alter any indexes, this means, that you should DROP the old index and. SQL Server ALTER INDEX Syntax. There's a difference between REORGANIZE and REBUILD. 1 additional answer. Reindex WSUS Database using T-SQL Script. Syntax ALTER INDEX {index | ALL} ON object DISABLE [;]. ALTER INDEX. It can only be fixed by doing an ALTER INDEX. Using this script, I receive an error. (About 1 TB of data including myIndex (non. ALTER INDEX. If ONLY is not specified, the table and all of its descendant tables (if any) are updated. 1. The statement can also merge two partitions into. When investigating we found that the index reorganise for the clustered index of FooDetail takes between 90 minutes and 120 minutes. x) and SQL Server 2014 (12. In order to keep the fragmentation ratio of indices low, you should re-organize the indices from time to time on MSSQL. [Table_Name] REBUILD WITH (FILLFACTOR = 80) OR - by using. Expand the table on which you want to reorganize an index. Syntax of ALTER INDEX. Since ONLINE rebuild is not an oprion for you (Enterprise only and you are on Standard), ALTER INDEX. First off: ‘Reorganize’ and ‘Rebuild’ are two different operations that each reduce fragmentation in an index. Under Select a page, select Options. [Product] SET ( ALLOW_PAGE_LOCKS = ON ) ALTER. So much for “index. One can also. Alter Index in PostgreSQL 9. The name of an index-method-specific storage parameter. 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. MySQL "plays it safe". ALTER INDEX REBUILD command has a few forms:ALTER INDEX ALL ON mytablename REORGANIZE PARTITION= @switch_partition and then the thread being blocked (which doesn't show either in sql_text or sql_command) has wait type: (2652058ms)LCK_M_SCH_M. DBCC SHRINKDATABASE(WorldOfHurt, 1); And it’ll reorganize the pages in the WorldOfHurt to leave just 1% free space. In this example, first, I’ll create a new non-clustered index by specifying ONLINE, RESUMABLE, and a MAXDOP of two. REORGANIZE also optimizes internal index and catalog structures. July 7, 2010 at 7:39 pm #1189953 . VeryImportantTable REBUILD; GO The second method is to reorganize indexes. Reorganizing an index uses minimal system resources. TEST_INDX DISABLE ; alter index IX1 on DBO. Rebuilding indexes online does not affect to table base. There is more functionality in the ALTER INDEX than the DBCC REINDEX commands:This means long-term object-level locks are not held and queries or updates to the underlying table can continue during the ALTER INDEX. 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. In the literature, I have read that, for heaps, you can write. I use SQL Server 2008 R2, I need to rebuild the index for every table in a database. See Online Index Operations. 여러 개의 행 그룹이 있는 테이블을 만든 다음, REORGANIZE가 행 그룹을 병합하는 방법을 보여 줍니다. tables T ON I. [dbo]. However, sometimes you don't want this, say for read only tables or huge tables. Rebuilding an Index. The table has an NVARCHAR (MAX) column. The total fragmentation value will be displayed. Too many full-text index fragments in the full-text index, can lead to substantial degradation in query performance. The effect delivered is that REORGANIZE "conditions" a whole lot of indexes in such a fashion as to perpetuate page splits, which is both logical and physical (page density) fragmentation at its. SQL Server 2016 allows customer to defragment this index using the familiar ALTER INDEX <index-name> REORGANIZE command instead of using a heavy hammer approach of rebuilding the 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. 3. 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. ALTER INDEX CCI_fact_Sale_CCI_ORDERED ON Fact. Oracle maintains the validity of the indexes by rebuilding their leaf and (sometimes. Henrik Høyer. So in order to fix my issue I went ahead and rebuild my index which fixed the issue. They can also remove. 14. In. 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. This example demonstrates how the ALTER INDEX REORGANIZE command works. 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 Query Optimizer does not update statistics after DBCC INDEXDEFRAG or ALTER INDEX REORGANIZE operations. 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. Testing ALTER INDEX REBUILD with WAIT_AT_LOW_PRIORITY in SQL Server 2014. 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. Preuzmi Microsoft Edge Dodatne informacije o. Right-click the index for which you want to set the max degree of parallelism and select Properties. 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. 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. This allows you to interrupt the rebuild and preserve the work already done. ALTER INDEX . You don’t need to run both against the same index. I suspect the reorganize is compacting the index after the rebuild and thus moving quite a bit of data around. 1 million rows in 11. REORGANIZE, or to rebuild the index using ALTER INDEX. Solution. 1. Our Production instance is running SQL Server 2014. 此示例将在所有分区上运行 REORGANIZE。 ALTER INDEX cci_FactInternetSales2 ON FactInternetSales2 REORGANIZE; 此示例将在特定分区上运行 REORGANIZE。-- REORGANIZE a specific partition ALTER INDEX cci_FactInternetSales2 ON FactInternetSales2 REORGANIZE PARTITION = 0; C. 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. In PostgreSQL, ALTER INDEX command changes the definition of an existing index. The following index operations require no additional disk space: ALTER INDEX REORGANIZE; however, log space is required. In the Rebuild Indexes. Increasing MAXDOP. or to reorganize use: ALTER INDEX __NAME_OF_INDEX__ ON __NAME_OF_TABLE__ REORGANIZE. Depending on the type of index and the Database Engine version, a rebuild operation can be done offline or online. -- Create a database CREATE DATABASE [ columnstore ]; GO -- Create a rowstore staging table CREATE TABLE [ staging. The only way to remove index fragmentation without causing data file growth again is to use DBCC INDEXDEFRAG or ALTER INDEX. Not specifying ONLINE option runs the script with the default value OFF. or to reorganize use: ALTER INDEX __NAME_OF_INDEX__ ON __NAME_OF_TABLE__. Connect to Database engine with your credentials. To re-sort data, use ALTER INDEX REBUILD. 3. See if you can find the index name either in whatever UI you use for Synapse or by querying the sys.