Best regards,. DROP INDEX when you are dropping a nonclustered index. Many people (and even solutions) in the SQL Server community say you need to look at Index Fragmentation levels (e. Index should be reorganized when index fragmentation is between 10% to 40%. Please refer to SQL Server Maintenance Plan Reorganize Index and Update Statistics Tasks to get more information about how to design the maintenance plan. One of the major reasons I wrote DBCC INDEXDEFRAG for SQL Server 2000 was as an online alternative to DBCC DBREINDEX. Rebuild the Indexes if the Fragmentation level is > 30%. Reorganizing an index is always an online operation, and it can be stopped at any time. The fill factor determines the amount of empty space on each page in the index, to accommodate future expansion. It's better to do reorg on Nightly. Depending on the type of index and database engine version, a rebuild operation can be done online or offline. e. This opens the Full-text. To achieve availability similar to the reorganize. The. SQL Server 2017 includes a new system view sys. LDAP_ENTRY. This means that for a lightly fragmented index (e. These are two different modes to remove index fragmentation. The detailed information can also be useful to determine whether your dedicated SQL pool is being impacted by a large number of small, fragmented tables, which can lead to delays in compilation. [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. I suggest 50% for REORGANIZE, 80% or even 90% for REBUILD. For more information, see ALTER INDEX (Transact-SQL). Heaptest default values go 50 select. skNumber) AS. And if the reorganize is a deadlock. Workaround. I have an index on a . line is helpful to give the user some indication of what indexes it is rebuilding and how far it has progressed. It may also take longer to REORGANIZE a highly fragmented index than to REBUILD it. If the index’s design or your SQL Server edition doesn’t allow for that, it’ll perform the last resort – an offline index rebuild. When using columnstore indexes, the delta store may end up with multiple small row groups after inserting, updating, and. Proceed to the Steps tab: Clicking on New. Lock durations are short and will cause minimal blocking of queries. If there are frequent changes to the full-text catalog, use this. The only. Same with updating the stats first and then rebuilding. Fair enough, but let’s make some adjustments. Sorted by: 2. Someone else set it up. You can always update statistics on their own. It also enables faster growth in the future. Index Fragmentation and out of date statistics! Don't forget stats, it's one of the most important factors in SQL Server deciding whether or not to use a index. Frequency of the maintenance should be considered with the goal of minimizing impact of log generation. Rebuild if > 30%. If you can afford that kind of maintenance window it's perfectly fine. This caused the system to reorganize or rebuild some indexes even. (About 1 TB of data including myIndex (non-clustered)). Your new index will have the size non less than the size of disabled index. e. It may also take longer to REORGANIZE a highly fragmented index than to REBUILD it. However, each time I check (even immediately after recreating the indexes) the avg_fragmentation_in_percent shows 100%. Default SQL Server value is 0 or 100%, which means that no free space should be left on each page. I am a new DBA to a SQL 2005 production Report server. Also, some tables/indexes will hardly be fragmented. The equivalent statistics update can be achieved by: UPDATE STATISTICS . It is compatible with all versions of SQL Server 2005 , 2008 , 2012 , 2014 and 2016. Tablename rebuild with (online=on) on. To work around this, try the following methods: Method 1 ( recommended ): Limit the number of full-text indexes in the same catalog. dm_db_index_physical_stats ‘ Dynamic Management View (DMV). Someone else set it up. ” Select the vault database(s). In Object Explorer, Expand the database that contains the table on which you want to reorganize an index. The documentation for alter index, for example, shows that it accepts an index_name, not an expression that might evaluate to an index name. Reorganizing only works on the leaf pages. For instance, in the Maintenance Plans of SQL Server 2017, it is possible to rebuild only those indexes where fragmentation level is higher than a specific percentage and has more pages than specified in "Page Count". Points: 1004494. SSC Guru. The REORGANIZE modifier for ALTER INDEX is not currently supported by Azure SQL. Reorganizing also compacts the index pages. Reorganizing an index defragments the leaf level of an index by physically re-ordering pages to match the logical order. x) and. In the New Maintenance Plan dialog box, in the Name box, type a name for the plan and select OK. First it’ll try an index reorganize, which is an online operation. Applies to: SQL Server 2016 (13. SQL Server 2005 Index Rebuild/Reorganize. SQL Server Tools. is_ms_shipped = 0 --Excludes any objects created as a part of SQL Server installation AND ss. When you reorganize an index, SQL Server physically reorders the leaf-level pages to match the logical order of the leaf nodes. In this article. If you're looking for whenif the index was ever rebuilt, the Ola sp does have the ability to log to a table and the previous DBA hopefully utilized this feature. 2. INDEX_REORGANIZE Reorganizes the index. Setup a new job to run update stats via IndexOptimize daily. This method can help when. We are using clustered columnstore index in SqlServer 2016 for 400M rows. Microsoft recommends fixing index fragmentation issues by rebuilding the index. The first part of this tip focuses on SQL Server Enterprise Edition to reduce the duration for index maintenance for off-line rebuilds. This can be demonstrated by small test. Expand Tables. So far, all good. Copy. This would also keep the original order of columns. The Full-Text Engine compiles and executes full-text queries. Defining "Index Stats Options" as well has become available in SSMS. You can go the easy way and use SQL Server Maintenance Plans, but unfortunately they’re very simplistic: you can only say “rebuild all the indexes” or “reorganize all the indexes”. ALTER INDEX . If you don’t spend much time with SQL Server and you. The following index operations require no additional disk space: ALTER INDEX REORGANIZE; however, log space is required. USE AdventureWorks2022; GO -- The following example updates the statistics for all indexes on the. Let’s first drop the Clustered Columnstore index that we created above using the below command. {"payload":{"allShortcutsEnabled":false,"fileTree":{"PowerShell/Working/SQLServer":{"items":[{"name":"SQLPS","path":"PowerShell/Working/SQLServer/SQLPS","contentType. Reorganize does not holds blocking locks. The. You can use WAIT_AT_LOW_PRIORITY time keyword along with online rebuild process and it will automatically abort the rebuilding process for. Expand Databases, and then expand the database that contains the full-text index. _in_percent > 50 AND ss. When I run alter index index [IndexName] on dbo. Also, in earlier versions the granularity of control was less refined. The first and most popular method is to rebuild indexes. IndexOptimize provided by Ola Hallengren. The alternative for online rebuilding is to create a new index using CREATE INDEX CONCURRENTLY, then drop the old. For a reorganize they are not, but just because a reorganize happened does not necessarily mean that a stats update is necessary. Syntax ALTER INDEX index_name ON table_name. To correct index fragmentation, you can reorganize an index or rebuild an. Rebuilding indexes with a new fill factor makes sure that database pages contain an equally distributed amount of data and free space. Here is the image for additional clarity. Checking the reorganize files box and as a result, shrinking the database file(s) will only impact the database negatively. Yes, rebuilding indexes will take a toll on your transaction log file. This index design guide contains information on index architecture, and best practices to help you design effective indexes to meet the needs of. Beginning with SQL Server 2016 (13. The SQL Server Maintenance Solution lets you intelligently rebuild or reorganize only the indexes that are fragmented. Your disk drive space is for files, not for ornamentation. Here is the image for additional clarity. The second set of options, in figure 8-5, rebuilds only a single partition of a clustered columnstore index and optionally changes the compression type. Therefore, you do not need to update statistics after performing ALTER INDEX REBUILD, DBCC DBREINDEX, DBCC INDEXDEFRAG, or ALTER INDEX REORGANIZE operations. Select the plus sign to expand the Management folder. avg_fragmentation_in_percent FROM sys. This means long-term object-level locks are not held and queries or updates to the underlying table can continue during the ALTER INDEX. Below the last two rows that displays the fail: Source: Reorganize Index Executing query "ALTER INDEX Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. line is helpful to give the user some indication of what indexes it is rebuilding and how far it has progressed. A clustered table provides a few benefits over a heap such as controlling how the data is sorted and stored, the ability to use the index to find rows quickly and the ability to reorganize the data by rebuilding the clustered index. Just go to the table, further expand the indexing folder and right after that you can right-click on it and select the option to rebuild all the indexes. In addition, reorganization uses minimal resources and is automatically. Use Ola Hallengren ‘s IndexOptimize but don’t use his defaults. m. I'm just using the reorg index task that is in the maintenance plan designer GUI. August 1, 2013 at 3:52 pm. Near the top of the script, around line 32, you will see a line of Transact-SQL code that looks like this: 1. Values: - 0: The script will reorganize or rebuild the fragmented indexes. The sys. Select “reorganize index” and “rebuild index. Rebuilding a clustered columnstore index is an offline operation until SQL Server 2019 when the ability to rebuild online was introduced. 2. It is causing other queries to wait, even simple ones like: SELECT * FROM tableName WHERE indexedColumn = @value. Create a execute sql task and schedule it through sql agent . When the catalog reorganize is occurring the users will still be able to query the full text data?. Examining the clustered index, I discovered that while it has 0% fragmentation listed, it has a page fullness value of only 23%. Note that the time it takes to complete the operations depends on the size of the database and how fragmented the indexes. I figured, the reason was because of the page_count, which was lower than 1000 for each of the indexes that were still very fragmented. ) Index Size is greater than 5 MB's. On the Standard bar, click New Query. dm_db_index_physical_stats fincation have index_id which display heap and index informatiob. Once you select that option it will bring up the following screen. Eliminate all deleted rows. Columns with text, image, ntext, varchar (max), nvarchar (max) and varbinary (max) cannot be used in the index key columns. As well as maintenance plans, SQL Server Agent jobs are also a handy way to automate and schedule index defragmentation jobs in SQL Server. GO. Your could find your indexes are 95% plus fragmented, affecting query performance badly. Regular index maintenance and statistics updates are crucial, that much is certain. Click OK. No – alter index rebuild or reorganize. 2 Answers. Recall the paper example from above: a rebuild would be like reprinting the document in the correct order and trashing the old ones. Yup, that is one perfectly valid way. Basically, an index rebuild copies the index to another place. What works for me may not work for you. USE AdventureWorks; GO ALTER INDEX ALL ON Production. Right-click Maintenance Plan and select Execute. There needs to be an automated Index defragmentation job that will either reorganize or rebuild the indexes based on the fragmentation level for a specific table in a specific database. [FactInternetSales] REBUILD PARTITION = ALL WITH (PAD_INDEX = ON, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, ONLINE = OFF,. You have to do some research and tailoring of how and when to do it based on your environment, though. Reindex the WSUS database. 1. Too many full-text index fragments in the full-text index, can lead to substantial degradation in query performance. The difference is easily visible. Online rebuilds are online available on the Enterprise version of SQL Server and your version probably isn't, so just set the operation not to be run "Online" on you Wizard. If you rebuild the index the stats are updated anyway, so doing it again is just wasteful. SQL 2012, massive bulk insert into “daily” (heap) table with PAGE compression (~100 GB, ~600 mio rows), create the nonclustered columnstore index (no other indexes on the table), partition switch into main (heap) table. FullTextIndexOptimize. name AS IndexName, indexstats. Does database on which tables reside have database owner. -- Compute fragmentation information for all full-text indexes on the database SELECT c. The syntax for rebuilding indexes is very simple, we just add the "WITH ONLINE=ON" clause to the ALTER INDEX command. To reorganize index SQL Server, right-click it & choose Reorganize. I would prefer to rebuild the indexes where the fragmentation percent of the indexes is greater than 30% and a Re-org of indexes where fragmentation percent is in between 9% and 30%. Thank you all for your suggestions. Reorganizing an index only deals with the fragmentation that exists, and the more fragmentation there is, the longer a reorganize will take. Large tables should be in their own full-text catalog. Script to Manage SQL Server Rebuilds and Reorganize for Index Fragmentation. This is a best practice for performance when you rebuild or reorganize indexes. You can query the sys. As tables grow and shrink, this fragmentation can ultimately play a role in how well SQL runs. In SSMS, expand the Kids1 table and right click on Indexes, select New Index and click on Non-Clustered Columnstore Index as shown below. If you search for index rebuilding, you will find many complex scripts on the web, but this can also be done. . The rebuild command will defragment all those intermediate pages. Use the online version of the Rebuild Index task ; Use the Reorganize Index task followed by the Update Statistics task; If you have the Enterprise Edition of SQL Server, the Maintenance Plan Wizard offers a Keep index online while reindexing option, which means that the index will continue to be available to users even while it is being. In SQL Server, when rebuilding an index which previously had statistics updated with PERSIST_SAMPLE_PERCENT, the persisted sample percent is reset back to default. If you what you are saying is true, even reorganizing the indexes that have never been, may. I want to rebuild or reorganize indexes in a table. 2 contributors. The following index operations require no additional disk space: ALTER INDEX REORGANIZE; however, log space is required. This has been found by using the schema change report in sql server 2005 and fixed by changing the job time of the Reorganize index. In it, enter the Job name, owner, optionally Category. Databases list. The reason given is that the indexes and statistics are partly based on available CPU and memory resources. Are you seeing problems related to statistics? Or is this just. Since you can have multiple columns in a table, here are a few considerations for index key columns. 1. Index rebuilds look. Yes. 4) Move database back to full recovery mode. This procedure automatically chooses whether to rebuild or reorganize an index according to its fragmentation level, amongst other parameters, and update statistics. The log size shouldn't be unrestricted. For us to perform this test we will first create a simple test table with a few columns and load a fair amount of data into it. This job needs to be scheduled and ran on a weekly basis due to large data load. Yes it will - but only to a certain degree. However I want advice whether it is required to setup the SQL Server Index and Statistics Maintenance scripts, because my SQL server is running on a SAN infrastructure and I have read that there is no benefit to setting fill-factor to less than 100%, or to perform index. If you use Ola Hallegren's scripts then you can set the thresholds for a rebuild/reorganise (say over 50% fragmentation for a reorganise, over 80% for a rebuild) and this can run overnight out of hours. Rename. There are two main ways to defragment a Heap Table: Create a Clustered Index and then drop it. 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. less than 30% fragmentation), it’s generally faster to reorganize the index, but for a more heavily fragmented index, it’s generally faster to just. You don’t get bonused based on the amount of free space on your drives. - 1: The script will just output the index reorganization or rebuild commands without running them. [Subscribers] REBUILD GO Rebuilding all indexes in a table USE [SQLMaestros] GO ALTER INDEX ALL ON [hol]. The Reorganize Index task encapsulates the Transact-SQL ALTER INDEX statement. The schema is the user name under which the table was created. This could be done (and is in some databases) when you make a deletion, but that imposes some performance penalty. There is all reason to only rebuild index that are fragmented, and a good maintenance. Last weekend the index maintenance took more than 5 hours and the full backup was running at the same time. You can safely stop it but you need to find out why your database became slow. Use a columnstore index to efficiently run real-time operational analytics on an. Next the New Job window will open. After finding out almost all databases on my SQL Server had fragmentation over 40%, I decided to do an index rebuild on all tables using a fill factor of 80. Rules For Index Maintenance: 1. Ignore: Fragmentation levels of 10 percent or less should not pose a performance problem, so you don’t need to do anything. Once you select that option it will bring up the following screen. ALTER INDEX __NAME_OF_INDEX__ ON __NAME_OF_TABLE__ REBUILD. 1) Since its indexes are not reorganized before. every 2-3 day if running maintenance once per day (night). Next the New Job window will open. If the index. ALTER INDEX ALL ON [dbo]. An index rebuild will always build a new index, even if there’s no fragmentation. To reorganize index SQL Server, right-click it & choose Reorganize. This index always show 100% avg_fragmentation_in_percent, index level 2, pages =8. This procedure automatically chooses whether to rebuild or reorganize an index according to its fragmentation level, among other parameters, and update statistics with a linear threshold. Another possibly is that the index is being rebuilt and then re-fragmenting again. Instead of our phone book having 1,000 pages that are 100% full, we might have 1100 pages that are only 90% full. Resolution: Reorganize and rebuild indexes. before i answer your question is the database on simple recovery. Indexes with small number of pages (<1000) will usually. You can do maintenance in phases, where each maintenance phase covers a subset of. T-SQL Alter Index. 0 to SQL Server 2016 there is no feature to rebuild index automatically. 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。. Then you can do an alter index with the rebuild clause whenever your threshold is reached. In the infrequent cases where you do need to reorganize or re-build index, consider these: Run index maintenance during off peak period. Reorganizing tries to put the leaf level of the index back in logical order within the pages that are already allocated to the index. we are using Ola index job to rebuild and reorganize the index. Otherwise you're holding an exclusive lock on the table/partition before you start the reorganize. You can read more on rebuilding indexes here . before i answer your question is the database on simple recovery. Use the online version of the Rebuild Index task ; Use the Reorganize Index task followed by the Update Statistics task; If you have the Enterprise Edition of SQL Server, the Maintenance Plan Wizard offers a Keep index online while reindexing option, which means that the index will continue to be available to users even while it is being. Sorted by: 1. You should also include page_count value in your query. On the Define Reorganize Index Task page, select the server or servers where you'll be moving index pages into a more efficient search. @OnlyModifiedStatistics = 'Y'. After executing the index defragmentation maintenance plan, we can check the status of the maintenance plan by checking the status of the SQL Agent job that is used to execute the maintenance plan tasks. (About 1 TB of data including myIndex (non. Here a Microsoft Engineer states that in most scenarios is not needed, but in the same forum thread I shared my experience step-by-step with images on how you can schedule a database maintenance on Azure SQL. The rebuild command will defragment all those intermediate pages. There are two options that can be used: Reorganize pages with the original amount of free space - this will use whatever was specified when the table was createdThe WSUSDBMaintenance script is a T-SQL script that can be run by SQL Server administrators to re-index and defragment WSUS databases. As visible in the above image, REBUILD and REORGANIZE are the two available choices to play out the trim operation over the page. From cruel experience, I know that I can repopulate that table from scratch (i. They are also configured from SSMS. Thank you, ShamAnswers. Right-click the index that you want to rebuild online and select Properties. below line will remove the NULL value from the query. Change it to be weekly or even less frequently. Copy and paste the following example into the query window and click Execute. To create SQL Server agent that will defragment specified indexes automatically, perform the following steps: Expand SQL Server Agent in Object explorer, right click on Jobs, and select New Job…: In General tab, specify the name and description for the job. The log size shouldn't be unrestricted. Rebuild if > 30%. Test all three and see which is fastest and which gives the least index fragmentation. Reorganizing the indexes will take less time, and less effort from the SQL server thus they can be done in a weeknight type of instances. If you cancel a rebuild operation midway, it. Use solutions such as Adaptive Index Defrag to automatically manage index defragmentation and statistics updates for one or more databases. SQL Server ALTER INDEX Syntax. Mar 8, 2021, 2:47 PM. Under the very wrong assumption that it wouldn't take long, I've ran ALTER INDEX ALL ON OUR_BIGGEST_TABLE REORGANIZE;. When rebuilding offline your index is completely unavailable, but the operation is faster than that online. It has an IF condition for the Reorganize but i don't need it, i need to modify the code so it queries indexes of a certain database and schema and rebuilds only if the fragmentation is bigger than 5%. The equivalent statistics update can be achieved by: UPDATE STATISTICS . If you want to try : I would like you to use READ_COMMITTED_SNAPSHOT isolation level for this operation and see if you succeed. Large object data is data with the image, text, ntext, varchar (max), nvarchar (max), varbinary (max), or xml data type. Index Rebuild : This process drops the existing Index and Recreates the index. The performance of large WSUS deployments will degrade over time if the WSUS database isn't maintained properly. g. ”. To create a new maintenance plan, right click on Maintenance Plan and select New Maintenance Plan and the following window will open. We will use 3 statements in order to show the blocking: ALTER INDEX. Create table and compressed index. If the clustered index is being rebuilt, an exclusive table lock is held. SQL Server internally does not keeps in any system table the fragmentation value so how it is going to decide what criteria to select when. Total fragmentation is 96% page fullness 66%, avg row size is 20,. To run the Maintenance plan, make sure your SQL server agent service is running. First of all you need to find the fragmentation percentage for the indexes in a database or table. Using SQL Server Management Studio: In the Object Explorer pane navigate to and expand the SQL Server, and then the Databases node Expand the specific database with fragmented index Expand the Tables node, and the table with fragmented index Expand the specific table Expand the Indexes node. It is causing other queries to wait, even simple ones like: SELECT * FROM tableName WHERE indexedColumn = @value. Now. – Ed B. A more intelligent way is to check fragmentation first then rebuild or reorganise. The entire index has to be read to. That means that it sometime has to contend with blocking because it's sharing the same pages that. When you rebuild indexes Offline, the operation acquires a Schema modification (Sch-M) lock on the table. As with a B-tree index, the rebuild will create a brand new columnstore index from the underlying data. dm_db_index_physical_stats (under the Examples -> D section: Using sys. In this article, we will go through these new. The script uses the following parameters: @reportOnly (required) Values: - 0: The script will reorganize or rebuild the fragmented indexes. The first rebuilds a single index on a table and the second rebuilds all the indexes on the table. You cannot say, “If the index is 45% or more fragmented, rebuild it– otherwise do nothing. As a good start, read these: Rebuild or Reorganize: SQL Server Index Maintenance (Kendra Little)Highly fragmented, the application performs well. If you are using Windows Internal Database, you will need to use the sqlcmd utility, which can be. In my last tip, Index Fragmentation Report in SQL Server 2005 & 2008, I discussed what fragmentation is, its different types, its performance impact and what are different methods available in SQL Server 2005 and 2008 to identify fragmentation levels. I have configured Ola Hallengren's backup and integrity check scripts. The script will do a reorg if fragmentation goes over 5 %. Full-Text Engine. To create a new job, right click on SQL Server Agent, select New and then Job. First it’ll try an index reorganize, which is an online operation. Specify the. Rebuild and Reorganize Index using SQL Server Management Studio (SSMS) Find and expand the table in Object Explorer >> Open Indexes >> Right-click on the target index >> Rebuild or Reorganize. This topic provides. Below the last two rows that displays the fail: Source: Reorganize Index Executing query "ALTER INDEX [PK_xxTableName] O. Note In SQL Server 2012 (11. SQL Server development version and Enterprise version has option ONLINE, which can be turned on when Index is rebuilt. the. However, you can create a staging table insert all rows into that, drop original table and rename staging table to original. Product REBUILD. create table dbo. The answer is: it depends. The procedure uses SQL Server ALTER INDEX command, with the REORGANIZE option NULL. We need to drag and drop tasks from the Toolbox (to open the toolbox use Ctrl + Alt + X) into the gray workspace area on the bottom as shown in the below screenshot. 4. Note The commented fnMs_GenerateIndexMaintenanceScript function is a table-valued function (TVF) that can. I don't remember if IDENTITY INSERT ON will help. I used the sp_who2 procedure to see which queries were waiting, and which other query they were blocked by. If not specified otherwise, the procedure uses the fill factor that is already set for each index. ;WITH cte AS ( SELECT object_id, index_id, partition_number, rows, ROW_NUMBER () OVER (PARTITION BY object_id, index_id, partition_number. To check the maintenance plan agent job, open the Job Activity Monitor window, and check if the job is enabled, executing or idle, the last. Reorganizing an index only deals with the fragmentation that exists, and the more fragmentation there is, the longer a reorganize will take. Yup, that is one perfectly valid way. You can also see if a reorganize will help until you can do a full rebuild. SET @BackupDirectory = N'C:Backup' -- <== Change this to your backup directory. SELECT a. This removes fragmentation, reclaims disk space by compacting the pages based on the specified or existing fill factor setting. 5) Perform full database backup. Let us create a Heap Table and insert some records in it and then check the fragmentation. Basically, an index rebuild copies the index to another place. You can go the easy way and use SQL Server Maintenance Plans, but unfortunately they’re very simplistic: you can only say “rebuild all the indexes” or “reorganize all the indexes”. Click the plus sign to expand the Tables folder. 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. IndexOptimize is the SQL Server Maintenance Solution’s stored procedure for rebuilding and reorganizing indexes and updating statistics. Designing the SQL Server Reorganize Index Task The script below allows you to rebuild indexes for all databases and all tables within a database. So, whenever I need to rebuild the indexes of my OrdersItemstable, with some millions of rows, my customers can't create/edit new orders for about 2-4 minutes. This requires the DBA to create such a maintenance job. Recall the paper example from above: a rebuild would be like reprinting the document in the correct order and trashing the old ones. Rebuilding indexes only does the index itself so the column stats are stale unless they hit the "20% data change + 500 records" criteria to trigger the auto-update. dm_db_index_physical_stats in a script to rebuild or reorganize indexes). I'm just using the reorg index task that is in the maintenance plan designer GUI. However, sometimes you don't want this, say for read only tables or huge tables. 1. You also can create a linked server to SQLAZURE and create a sql agent job. There are two ways of doing that: (i) by using the ‘ DBCC SHOWCONTIG ‘ command, and (ii) by using the ‘ sys. ALTER INDEX [myIndex] ON [dbo]. Index maintenance usually starts 3 hours before the database full backup and ends before the full backup start. Larger indexes have more intermediate levels and pages. ”. -Search all indexes of a table that have 5% or more of fragmentation and page_count >= 1000. or to reorganize use: ALTER INDEX __NAME_OF_INDEX__ ON __NAME_OF_TABLE__ REORGANIZE. do nothing; reorganize an index; rebuild an index; Don't reinvent the wheel - just go see and use the script!I am a new DBA to a SQL 2005 production Report server. This is a powerful feature that you can use to your advantage.