Use ALTER INDEX REORGANIZE, the replacement for DBCC INDEXDEFRAG, to reorder the leaf level pages of the index in a logical order. Rebuilding indexes is done using the following statement. First, we will start the index reorganization in a session using the following T-SQL code. 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. 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. ALTER INDEX ALL ON ExecQueryWaitStats REBUILD. VeryImportantTable REBUILD; GO -- If you want to rebuild all the indexes on a table, try this code. "cannot be reorganized because page level locking is disabled" means (in sys. To reorganize an index, the following command can be used: ALTER INDEX IX_Employees ON Employees REORGANIZE; To change the fill factor of an index, the following command can be used: ALTER INDEX IX_Employees ON Employees. There are 3 Columns to look out for 1. ALTER INDEX [IX_beerfilter_FloatTable_DateAndTime] ON [dbo]. Therefore you need to identify those tables/indexes & you need to do the re. 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. below is the script that i use to reorganize the index. Index automation job script. 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。. tables T ON I. We can however get it back to a compressed segment by issuing the following command we saw previously. Designing the SQL Server Reorganize Index Task Perform ALTER INDEX ALL . REORGANIZE command (more details on this command and its usage are given below). In other words, the progress of index reorganization cannot be obtained before SQL Server 2008. The following example associates the DocumentPropertyList property list with the full-text index on the Production. When you rebuild, SQL creates a new fresh index. ) of an existing index, but it doesn't allow changes to the columns that make up the index. Alter table move - The alter table move command moves rows down into un-used space and adjusts the HWM but does not adjust the segments extents, and the table size remains the same. However, ALTER TABLE ignores DATA. To reorganize index SQL Server, right-click it & choose Reorganize. In other words, the progress of index reorganization cannot be obtained before SQL Server 2008. ". ) REORGANIZE statement. 常にオンラインで実行されます。 つまり、alter index reorganize トランザクション中は、長期にわたって他をブロックするテーブル ロックは保持されず、基になるテーブルへのクエリまたは更新を続行できます。 無効なインデックスに対しては指定できません。 Open Object Explorer & expand the database containing the table you wish to reorganize. " I'm modifying our index reorg/rebuild process to be sensitive to indexes that have ALLOW_PAGE_LOCKS turned OFF. 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、. any update on the old index will also get applied to the new index. For more information, see Data Types (Transact-SQL). I need to change the default value for the ONLINE option of almost all of the indexes to ON so that rebuilding an indexes with this script: ALTER INDEX [Index1]|ALL ON [Table1] REBUILD; will do the same as: ALTER INDEX [Index1]|ALL ON [Table1] REBUILD WITH (ONLINE = ON); I have to do it without recreating the indexes. The nonclustered B. Syntax of ALTER INDEX. PARTITION Only rebuild/reorganize one partition of the index. 1 million rows in 11. The name (possibly schema-qualified) of an existing index to alter. This can be mitigated by regular maintenance of the columnstore index with ALTER INDEX REORGANIZE. After a couple of months, we started seeing an occasional blocking of jobs in the morning. Starting with SQL Server 2016 (13. REORGANIZE also optimizes internal index and catalog structures. [TableName] REBUILD GO-- Check that only clustered index is enabled SELECT OBJECT_NAME (OBJECT_ID), Name, type_desc, is_disabled FROM. e. Alter Index ReOrganize – 345512 ms (346 secs or just under 6 minutes to complete) DBCC DBReIndex just like mentioned at the start of this blog is being deprecated. Ok i am confused, i was replacing my "alter index reorganize" part with the "execution dbo. The following index operations require no additional disk space: ALTER INDEX REORGANIZE; however, log space is required. It reorgs indexes when fragmentation is below 30% else it rebuild the index. I got no errors, but I still have fragmentation. Use the ReorganizeIndex Task dialog to move index pages into a more efficient search order. Preuzimanje pregledača Microsoft Edge Više. Make sure the DB recovery mode is SIMPLE. Since ONLINE rebuild is not an oprion for you (Enterprise only and you are on Standard), ALTER INDEX. ALTER INDEX IX_OrderTracking_SalesOrderID ON. 1) Disable all NC indexes. Cancelling / Stopping ALTER INDEX REORGANIZE. However, I would recommend researching scripts others have written that are well tested and used by. SQL Agent doesn't connect as SA, and the rebuild index task generates a command that looks like ALTER INDEX [ci_FactInternetSales] ON [dbo]. In columnstore world an update translates into a delete + insert and a delete is "deferred". allocation_units. In the infrequent cases where you do need to reorganize or re-build index, consider these: Run index maintenance during off peak period. ALTER INDEX [NameOfTheIndex] ON [SchemaName]. Everything I say below applies to row. [User] REBUILD [SQLSTATE 01000] (Message 0). If the fragmentation of an index is more than 20% then we can try rebuilding that index: ALTER INDEX Index_Name ON [Database_name]. a) if possible. FactProductInventory’ by hostname ‘XXXXX. REORGANIZE, UPDATE STATISTICS and a simple SELECT statement. before i answer your question is the database on simple recovery. . Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. When we cancel the index rebuild, we need. UPDATE STATISTICS [dbo]. The command I run is: ALTER INDEX [xxx] ON [xxx]. Are there any advantages or disadvantages to using " UPDATE STATISTICS (Index name) " as opposed to "ALTER INDEX (index name) ON. Of course, they are head blockers (because it is Standard Edition, each ALTER INDEX command runs with ONLINE=OFF). The reorganization process is blocked when the process tries to move rows to the full file. Listing 14-7 Syntax for a Columnstore Reorganize Operation. The first rebuilds a single index on a table and the second rebuilds all the indexes on the table. When a clustered index is dropped ONLINE, SQL Server rebuilds the heap two times, once for step 1 and. An index rebuild will always build a new index, even if there’s no fragmentation. First, make sure you're checking index fragmentation and only rebuilding indexes that actually need it. 1 Answer. 4) You cannot change the value of the PCTFREE parameter for the index as a whole (ALTER INDEX). upvoted 1 times Matt2000 3 months ago I agree. Your replica/ mirrors may fall behind. ALTER INDEX (Transact-SQL) Salt la conținutul principal. DECLARE. Since it involves p_first and that partition is huge, it takes a long time, and locks the table. Reorg the Indexes if the Fragmentation level is > 5% and <30%. m. –Rebuild/Reorganize indexes on all the tables on a database based on the fragmentation. Right-click the index that you want to rebuild online and select Properties. Recall the paper example from above: a rebuild would be like reprinting the document in the correct order and trashing the old ones. Compaction is based on the existing fill. This is a best practice for performance when you rebuild or reorganize indexes. After running the Rebuild and Reorganize Index operation our database developer wrote, the Clustered Indexes dropped significantly to less than 0. From the alter index manual page: WITH ( LOB_COMPACTION = { ON | OFF } ) Specifies that all pages that contain large object (LOB) data are compacted. Both are deprecated in favour of ALTER INDEX where. Thanks, I will try this next time. Expand the table on which you want to reorganize an index. The name of the extension that the index is to depend on. There is all reason to only rebuild index that are fragmented, and a good maintenance. ALTER INDEX ALL ON dbo. Assume the following conditions are true before creating the clustered index: The existing table (heap) contains 1 million rows. An antimatter column is used to track possible conflicts between the updates and the rebuild (ie. The Rebuild Index Task uses the ALTER INDEX statement. In. The ALTER INDEX statement in SQL Server (see docs) is available to alter certain properties (storage properties etc. Expand the table in which the index belongs and then expand Indexes. However, the. Nadogradite na Microsoft Edge biste iskoristili najnovije funkcije, bezbednosne ispravke i tehničku podršku. Right-click the index and choose rebuild and then reorganize. WITH (ONLINE = ON) Drop the existing columnstore index and run the query again. 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. Solution. Rebuilding an index drops and re-creates the index. 1. On this MSDN Page it says if you should reorganize or rebuild based on the amount of fragmentation:. x) and later versions. Ini membuat tabel yang memiliki beberapa grup baris, lalu menunjukkan cara REORGANIZE menggabungkan grup baris. In order to resolve the index reorganization issue, we will enable the row and page level locking by altering the index as shown below: USE MSSQLTipsDemo GO ALTER INDEX [PK_Product] ON [Production]. ALTER INDEX [myIndex] ON [dbo]. Index types. This form of REINDEX cannot be executed inside a transaction block when used with a partitioned index. Reindex WSUS Database using T-SQL Script. From Reorganize and Rebuild Indexes. Change the index option settings. [TableName] REBUILD GO-- Check that only clustered index is enabled SELECT OBJECT_NAME (OBJECT_ID), Name, type_desc, is_disabled FROM sys. Expand the table on which you want to reorganize an index. x), REORGANIZE is only used to compress CLOSED rowgroups into the columnstore. For descriptions of all table options, see Section 13. x) dan SQL Server 2014 (12. References: QUESTION 39 You administer a Microsoft SQL Server database named Sales. Index reorganize jobs can be interrupted and can be resumed later at favorable time. Reparaciones rebuild sql; sql-server; Share. Sale_CCI_ORDERED REORGANIZE;. Depending on the type of index and the Database Engine version, a rebuild operation can be done offline or online. This job needs to be scheduled and ran on a weekly basis due to large data. Improve this answer. All other index DDL operations require additional temporary disk space to use during the operation, and permanent disk space to store the. -Search all indexes of a table that have 5% or more of fragmentation and page_count >= 1000. VeryImportantTable REBUILD; GO The second method is to reorganize indexes. All other index DDL operations require additional temporary disk space to use during the operation, and permanent disk space to store the. Pour plus d’informations, consultez Configurer des opérations d’index parallèles. The name of an index-method-specific storage parameter. The deleted leaf rows should be less than 20%. If the table (or rather: index) is partitioned, then you could consider rebuilding at partition level. It defragments the leaf level of clustered and nonclustered indexes on tables and views by physically reordering the leaf-level pages to match the. 737k 176 176 gold badges 1336 1336 silver badges 1461 1461 bronze badges. 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. 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. There are scripts out there that will go though and reorganize verses rebuild versus skip. If I run the top query again, the index is still listed there with the same level of fragmentation. Sorted by: 2. or to reorganize use: ALTER INDEX __NAME_OF_INDEX__ ON __NAME_OF_TABLE__. Then try copying the data into a completely new table. I don't agree with Kin this is a knee response that will be a least help. IndexOptimize is the SQL Server Maintenance Solution’s stored procedure for rebuilding and reorganizing indexes and updating statistics. You must rebuild each partition or subpartition. 4 Answers. The following advantages will be provide using alter index <name> rebuild online: o DMLs are allowed on the base table1 Answer. The tablespace to which the index will be moved. It is compatible with all versions of SQL Server 2005 , 2008 , 2012 , 2014 and 2016. 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. -- Create a database CREATE DATABASE [ columnstore ]; GO -- Create a rowstore staging table CREATE TABLE [ staging ] (. Our Production instance is running SQL Server 2014. Monitor tempdb during rebuild operations. Recommendations and examples for indexing tables in dedicated SQL pool in Azure Synapse Analytics. In this article. The ways I can think around this problems are: 1) set the database to simple recovery mode while you run the reorganize, but you said that isn't acceptableExample #. Before you execute the query you can disable the background tuple mover task by using the trace flag 634. Resolve SQL Server Database Index Reorganization Page Level Locking Problem. Pour plus d’informations, consultez Configurer des opérations d’index parallèles. 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. 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. Changing the table's owner automatically changes the index as well. It preserves the index and constraint definitions. If you need to modify the properties of an index or reorganize or rebuild an index, you can use ALTER INDEX as follows. If index is range-partitioned or hash-partitioned, then Oracle Database deallocates unused space from each index partition. What is index fragmentation, and why is it a concern?Index fragmentation occurs when data pages within an index are disordered or scattered. WITH FULLSCAN. Indexes and ALTER TABLE. Change the properties of an index. column_store_dictionaries returns no rows at all. December 3, 2010 at 12:21 pm. column_name DISABLE; ALTER INDEX index_name ON table_name. REBUILD (to remove forwarding pointerns in a heap) and ALTER INDEX. Change the index option settings. x), you can create nonclustered B-tree or rowstore indexes as secondary indexes on a clustered columnstore index. It was trying to do so because when Index is. Syntax: ALTER INDEX [schema. The first part of this tip focuses on SQL Server Enterprise Edition to reduce the duration for index maintenance for off-line rebuilds. Right-click on the fragmented index and select Rebuild or Reorganize option in the context menu (depending on the desired action): Click the OK button and wait for the process to complete. The new name for the index. > 30% ALTER INDEX REBUILD WITH (ONLINE = ON)*. The Reorganize Index task encapsulates the Transact-SQL ALTER INDEX statement. ALTER INDEX [myIndex] ON [dbo]. I am using the following to rebuild the index. 1 additional answer. One can also reorganize an index using. The following index operations require no additional disk space: ALTER INDEX REORGANIZE; however, log space is required. . If you have fragmentation, you need to REBUILD or REORGANIZE. Expand Databases, right-click SUSDB and select New Query. (About 1 TB of data including myIndex (non. 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. The REORGANIZE operation is always performed online. Alter Index in PostgreSQL 9. 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 process of reorganizing an index-organized table requires four steps, as shown in the following series of images. . You need the name to be able to drop the index. After rebuilding and reorganizing, right-click the index and click Properties > Fragmentation. This caused the system to reorganize or rebuild some indexes even when the indexes weren't much fragmented, which was wasteful. Maybe I should explain. storage_parameter. ALTER INDEX Index_Name ON Sales. Starting with SQL Server 2016 (13. An index reorganize holds an intent-exclusive table lock throughout the operation, which will only block shared, exclusive, and schema-modification table locks. 13. I want to reorganize or rebuild indexes. 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. and Rebuild if the fragmentation is above 30%. ALTER INDEX REORGANIZE is used for rebuilding or reorganizing indexes, but it does not maximize columnstore compression. If you have space constraints, and can’t make use of single-partition rebuild, reorganizing is the way to go. ALTER INDEX [myIndex] ON [dbo]. ALTER INDEX All ON tableName REBUILD; This drops the index and recreates it, removing fragementation, reclaims disk space and reorders index pages. In SQL Server 2014, new functionality was introduced that allows you to control how the blocking mechanism, that is required by the online index rebuild operation, is handled. None of these errors were written to the SQL logs. ドメイン索引を変更する場合は、索引の索引タイプに対してexecute. partition_number The number of an existing index partition to rebuild/reorganize. Descărcați Microsoft Edge Mai multe informații. In the Indexes folder, expand the file. Data pump (expdp, impdp) – Offline method to transfer data and reorganize tables. It can only be fixed by doing an ALTER INDEX. index_id = 0 -- Heap or table indexstats. object_id WHERE I. Our Production instance is running SQL Server 2014. Regards Echo ALTER INDEX is in fact just an alias for the forms of ALTER TABLE that apply to indexes. There were questions regarding which indexes are actually rebuild touched and what are not. In the Rebuild Indexes dialog box, verify that the correct index is in the Indexes to be rebuilt grid and click OK. Right-click the index for which you want to set the max degree of parallelism and select Properties. I have tried almost. By doing the index with ONLINE=ON, you should be able to minimize blocking. The default is ON. ALTER INDEX PK_MyFragmentedIndex ON dbo. Rebuild if > 30%. This prevents modifications to the table. If you truly want to REBUILD, and you want to do it for ALL indexes on a given table, then the command would be (straight from the official docs that npe pointed you at): ALTER INDEX ALL ON mySchema. Acest browser nu mai este acceptat. The problem I’ve been seeing is people rebuilding indexes and then updating statistics. Copy and paste the following example into the query window and select Execute. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance. Scale back down once the index rebuild is complete. Note: One thing ALTER INDEX does not allow you to do is change the set of columns that comprises the. DECLARE @Statement. tables And then copying and pasting the output to a new query window and running that. It had been holding exclusive locks for the duration of the ALTER INDEX statement execution. 2) After creating the Automation Account, open the details. column_name DISABLE; ALTER INDEX index_name ON table_name REBUILD; ALTER. 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. ALTER INDEX __NAME_OF_INDEX__ ON __NAME_OF_TABLE__ REBUILD. I used the sp_who2 procedure to see which queries were waiting, and which other query they were blocked by. There was formerly an ALTER INDEX OWNER variant, but this is now ignored (with a warning). LOB_COMPACTION Compacting large object (LOB) data can reduce the disk space used. • ALTER INDEX REORGANIZE, But the user needs to use log space. asked Jul 26, 2022 at 12:55. 5% and < = 30% ALTER INDEX REORGANIZE 30% ALTER INDEX REBUILD WITH (ONLINE = ON)* Reorganize and Rebuild Indexes. Update COLUMNSTORE index in DB transaction. To reduce the number of fragments, reorganize the full-text catalog by using the REORGANIZE option of the ALTER FULLTEXT CATALOGTransact-SQL statement. ”Reorganizing an index (using the old DBCC INDEXDEFRAG I wrote, or the new ALTER INDEX. There is a similar case for your reference: Check progress of alter index reorganize / rebuild. RedDk 31-Aug-13 15:32pm. DROP INDEX when you are. 4) The final step is to reload the data back. If you have any question, please feel free to let me know. The problem is that this ALTER INDEX blocks the web server SPIDs & the whole things locks up for an hour & an admin has to go in & kill the index spid. sakuraime 2,311. But creating the new partitions through a complete copy of the necessary data, if a crash occurs, the old. Select Allow online DML processing, and then select True from the list. . Syntax ALTER INDEX {index | ALL} ON object DISABLE [;]. To rebuild an index means to create anew one, then drop the old one. [dbo]. The following index operations require no additional disk space: ALTER INDEX REORGANIZE; however, log space is required. Microsoft's guidance on index reorganize and rebuild supports this: For example, if a given index is used mainly for scan operations, removing fragmentation can improve performance of these operations. ALTER INDEX [PK_SalesOrderDetailEnlarged_SalesOrderID_SalesOrderDetailID]. I have many DBs that are currently used for insert and delete. When you don't explicitly name the constraint / index, a name is auto-generated. 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. Reorganize Doesn`t Create A New Index It is again a short demo which shows that Reorganize doesn`t create a new Index, In this demo we will reorganize the index and we will check does the Index ObjectID and PageIDs changed in comparewith the last demo. ALTER INDEX REORGANIZE is fully logged regardless of recovery mode. Or exclude the ALTER operation using WHERE clause ( [allow_page_locks] = 0) on these indexed tables. partition_number The number of an existing index partition to rebuild/reorganize. The results for this command are up for comparison against the Alter Index Rebuild command. Rename the task to Index Maintenance. Frequency of the maintenance should be considered with the goal of minimizing impact of log generation. Alter Index in PostgreSQL 9. Specify the name of the maintenance plan. It is causing other queries to wait, even simple ones like: SELECT * FROM tableName WHERE indexedColumn = @value. This functionality benefits from the newly defined Low-Priority queue that contains the processes with priorities. 図「key_compression. My_Table REBUILD WITH (ONLINE = ON , MAXDOP = 1, RESUMABLE = ON) Which executes successfully but doesn't seem to do anything. In Oracle, you can use the Alter Index Rebuild command to rebuild indexes. The tuple mover has done its job and all row groups are in the compressed state. The table has an NVARCHAR (MAX) column. See Online Index Operations. 000). DROP INDEX when you are dropping a clustered index offline without specifying the MOVE TO clause and nonclustered indexes do not exist. Maybe I should explain. Disabling an index prevents user access to the index, and for clustered indexes, to the underlying table data. If you have any question, please feel free to let me know. REORGANIZE operation. Because the data_compression option is not retained when scripting out the Index create statement. (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. Expand the Indexes folder. As you can see the percent_complete tells us that this process is 22% complete along with the estimated completion time. Here is the script which we used to rebuild the indexes in the TempDB. Syntax ALTER INDEX index_name ON table_name. The Reorganize Index task also includes an option to compact large object data. ALTER INDEX. Click the plus sign to expand the table on which you want to rebuild an index online. Reorganizing should be used at lower (<30%) fragmentations but only rebuilding (which is heavier to the database) cuts the fragmentation down to 0%. Click OK. Not specifying ONLINE option runs the script with the default value OFF. Otherwise you're holding an exclusive lock on the table/partition before you start the reorganize. Question 1: Consider a scenario where you issue a full backup. Your script is actually command to issue reorg and rebuild statement based on other part of code which is not copied here. If the table has a secondary “ TOAST ” table, that is reindexed as well. resource_type, tl. REBUILD) and reorganizing an index (using ALTER INDEX. 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. Other conditions, such as small tables, over-partitioned tables, or under-partitioned. Agustin Coronel Agustin Coronel. I cannot say that index reorganize job was the reason for slowness because for me its a light activity. Yes it looks like some smaller tables but. This means you will need less free space in your user database during an index rebuild operation and more free space in tempdb. EXEC sp_MSForEachTable 'ALTER INDEX ALL ON ? REBUILD' There is no statement to do all tables in the database like you tried above. and even. In order to keep the fragmentation ratio of indices low, you should re-organize the indices from time to time on MSSQL. onemorecoke. 3) You cannot also specify the deallocate_unused_clause in this statement. 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 the Index Properties dialog box, make the desired changes. When investigating we found that the index reorganise for the clustered index of FooDetail takes between 90 minutes and 120 minutes. [TableName] REORGANIZE WITH (COMPRESS_ALL_ROW_GROUPS = ON) The transaction can take a long time. 3) Load data. Modify an existing index on a table or view. The ways I can think around this problems are: 1) set the database to simple recovery mode while you run the reorganize, but you said that isn't acceptable Example #. Preuzmi Microsoft Edge Dodatne informacije o. #1637994. _depth, index_level). 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. x) and in Azure SQL Database, we recommend using ALTER INDEX REORGANIZE instead of ALTER INDEX REBUILD for columnstore indexes. ----- This article - Optimize index maintenance to improve query performance and reduce resource consumption helps you decide when and how to perform index maintenance. This index design guide contains information on index architecture, and best practices to help you design effective indexes to meet. 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:Rebuild is an ALTER command so even if the job is running the step is trying to execute the plan which has that command in the logic and failing. Note In SQL Server 2012 (11. You could also refer another query which may be helpful to you. It's not documented to have a particular deadlock priority, and it does make data changes. They work differently toward the same end.