So it can remove some fragmentation - but only on a limited scale. Indexes play a critical role in SQL Server query performance. Expand the table on which you want to reorganize an index. Friday, August 26, 2016 2:15 PM. Burt King. Hi, The widely used thresholds are: Reorganize if fragmentation is between 10-30%. A quick remark about the options you have: exec AzureSQLMaintenance @operation,@mode. The SAMPLED mode returns statistics based on a 1 percent sample of all the pages in the index or heap. Stack Overflow. On the second pass, SQL Server swaps the next physical page (7) with the next logical page (2). (SQL Server) How to defragment indexes with LOBs? 1. Find and remove unused indexes – everything that is unused doesn’t do anything good. Here are some steps you can follow to free up some space in a hurry. Over time these indexes become fragmented so that ordered data retrieval becomes less efficient. MyTable REBUILD. 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. We are constrained to use Indexdefrag as we may not take down servers UNLESS there is a breakage that. Index reorganization is a process where the SQL Server goes through existing index, and cleans it up. and less effort from the SQL server thus they can be done in a weeknight type of instances. is_ms_shipped = 0 --Excludes any objects created as a part of SQL Server installation AND ss. avg_fragmentation_in_percent. If only table_id is specified or if index_id is 0, the data pages of the specified table are scanned. If you are experiencing slow full-text query performance, you can use sys. July 17, 2012 at 12:16 pm. For more details, we could refer to the following articles:I think you need index_id in the joins against sys. All they do is waste space and resources. Within sql not only is there file fragmentation, but also fragmentation on the underlying objects, tables and indexes. I would highly recommend using a tool specific to sql server to defragment the drive(s) on which the files sit. It can be turned on by using the in-app wizard in any version. If you have a clustered index on the table the fastest way to defragmanet your table would be to drop and recreate the clustered index. It depends on the degree of fragmentation of Indexes. Share This: As the data in the database tables of Microsoft SQL Server changes, their indexes change. In enterpise edition of SQL server you can also rebuild index online (which is better than index defrag for performance) Yes. 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. 0. Failing that (ie Standard Edition etc), look at re-organizing indexes - these will keep them online. Terrific work Michelle! The script rivals Ola Hallengren's broader maintenance scripts that I use often. Perform logical consistency checks on indexes. It creates a thread that runs periodically to detect when the database has more than 25% free disk space allocated to it. Similar to its clustered index counterpart, the index key columns are stored in a B-tree structure except in this case the actual data is not stored in the leaf nodes. #1637994. There are several types of fragmentation that can occur. 2. as our primary concentration is to defrag indexes. Basically, do the minimum commensurate with your fragmentation levels. The issue was not enough contiguous free space inside the database to arrange the index consecutively. Lock durations are short and will cause minimal blocking of queries. Reorganize index and level of defragmentation. Identify this using DBCC SHOWCONTIG (in SQL 2000) or sys. Only indexes with > 10,000 pages will be touched. When i try to defrag them using ALTER INDEX. Yes, this is due to low page count. 3. 1. Now we will see how to defrag indexes. If. The disks defrag OK, and SQL is not harmed - this is the result that should be expected. ApexSQL Defrag can be easily used to connect to your SQL Server instance and analyze the index fragmentation percentage at the instance, database, or table levels. In this article. SQL Server 2000 introduces a new DBCC INDEXDEFRAG statement to defragment clustered and nonclustered indexes on tables and views. To rebuild or reorganize indexes manually, head over to the Fragmentation tab. How Defragmentation Improves Performance. dm_db_index_physical_stats (DB_ID(), NULL, NULL,. Link: Microsoft SQL. dm_db_index_physical_stats. [avg_fragmentation_in_percent] FROM sys. In addition, you can use the dynamic management view sys. If an index contains less than 100 pages, I will perform no maintenance. Database Engine Tuning Advisor is a client application provided by Microsoft that analyzes database workload and recommends an optimal set of indexes for your Microsoft SQL Server databases based on the kinds of queries you run. Use the ALTER TABLE command to rebuild the Heap. No, there is no auto-magical defragging of indexes. Failing that (ie Standard Edition etc), look at re-organizing indexes - these will keep them online. When the SQL Server service is running, all of the mdf and ldf files are considered open and thus skipped. When the rebuild is finished, SQL Server deletes the original clustered columnstore index. Chad Boyd. In order to begin, proceed to Manage Index. This may affect the concurrency of the server that's running SQL Server. The answer to this is simple, Shrinking causes Logical fragmentation. You can verify that by doing an "edit" on the page and. 0The Transact-SQL programming language provides DBCC statements that act as Database Console Commands for SQL Server. LesterDove, the problem may be your . Note: In versions 2020. If not specified, all non-system databases plus msdb and model will be defragmented. 8. Now understand that logical fragmentation is not introduction of free space or some kind of space between rows present in index. indexes AS [idx] ON [ips]. This index uses column-based data storage and query processing to achieve gains up to 10. I teach the MS 2073 class quite a bit and the course material just. In this case Reorganize option is selected:Databases with no index defragmentation were an average of 5% fragmented. In a nutshell, SQL Server’s performance can be most improved by focusing on its internals. Copy the detached database file back to the. Maintaining indexes is an ongoing and very responsible job assignment. I have a plan that I am not sure will work: Normally defrag the partition while the service is still running until the only fragmented files are the database files. DBCC INDEXDEFRAG defragments the leaf level of an index so that the physical order of the pages matches the left-to-right logical order of the leaf nodes, thus improving index-scanning performance. If you want to defragment a heap in SQL Server 2005, you have three options: 1) create a clustered index on the heap, then drop the clustered index;Many of my clients to defrag their hard drives; some however do not. 1. The T-SQL script in this article can be run by SQL Server administrators to reindex and defragment WSUS databases. This schema modification lock blocks all other concurrent access to the table, but it is only held for a very short period of time while the old index is dropped and the statistics updated. DBCC DBReIndex – 356610 ms (357 secs or just under 6 minutes to complete). However, over time and especially when heavy. OBJECT_ID) + '] REORGANIZE ; ' ELSE 'ALTER INDEX [' + ind. The Server is running SQL Server 2017 (RTM-GDR) (KB4505224) - 14. This script has been tested and will work with SQL Server 2005, SQL Server 2008, SQL Server 2008R2, SQL Server 2012, SQL Server 2014, SQL Server 2016, SQL Server 2017 and SQL Server 2019. I have some fragmented indexes on my production databases. An index rebuild will always build a new index, even if there’s no fragmentation. avg_fragmentation_in_percent, ips. The best recommendation I have is to create your own procedure which loops through the tables of the database and runs DBCC INDEXDEFRAG. Fairly easily, you can use my sp_RebuildIndexes procedures as a base and then change the code to DEFRAG instead of rebuild. HSQLDB version 1. It’s like a looking at the results of a developer writing SQL after three Red Bulls – it doesn’t make any sense, and you just want to wad it up and throw it away. Fortunately, like Windows 7, Server 2008 can on a schedule defrag. I took a look at its log and it looks like it hadn't even finished with the indices from the first table by the time I cancelled the job: Job '02. This optimizes and speeds up file access. 11,485 questionsHow to monitor the status of index defragmentation jobs. It automates the time-consuming process of finding fragmented indexes based on policies for the targeted databases. For maintenance purposes, you can use Azure Automation and create a recurring script that checks for fragmented indexes and optimizes it. Defragmentation utilities may lock sections of the file, preventing SQL Server from completing a read or write operation. It has been proven that Online Index Rebuild – Can Cause Increased Fragmentation when it is allowed to run with MAX DOP > 1 and ALLOW_PAGE_LOCKS = OFF directives. Indexing. Reduce page splits with index fill. OBJECT_ID) + '] REBUILD; ' END, 'GO' FROM sys. [name] , ips. Creating a SQL Server Maintenance Plan. index_id as [SI. Next the New Job window will open. 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): For more instructions see the official docs. Expand the Indexes. Use the ALTER TABLE command to rebuild the Heap. A SQL Server DBA myth a day: (29/30) fixing heap fragmentation. Greater than 30% – rebuilding the index with the REBUILD option is probably the best option. This article serves as a guide as to how to automate and schedule SQL Server index defragmentation, and covers three different ways of doing it. It’s like a looking at the results of a developer writing SQL after three Red Bulls – it doesn’t make any sense, and you just want to wad it up and throw it away. The other thing you can do, for when you do need to defragment indexes (if for example you have deleted a large amount of data), is using SQL Server's Service Broker to set up the maintenance plan for multiple tables in a batch. Review Deeper insight into unused indexes for SQL Server tip. SQL - defragmenting an index on a compressed table. Fortunately, like Windows 7, Server 2008 can on a schedule defrag. The best recommendation I have is to create your own procedure which loops through the tables of the database and runs DBCC INDEXDEFRAG. dm_db_index_physical_stats (Transact-SQL). I have SQL Server Agent (2005) jobs that periodically perform CHECKDB and a defrag (ALTER INDEX REORGANIZE/REBUILD) of any index that is highly fragmented. Having said that, fragmented data can produce unnecessary reads thereby reducing. You can use SQL Server Management Studio (SSMS) or T-SQL to get started managing index fragmentation. 0 databases. Check the comment header block for its documentation. At first glance, that would seem to indicate that your database got worse off if you defragmented! But like all good novels (and most bad ones), the plot thickens. To make the script at least a bit faster, I narrowed it down from. It gives you the flexibility to reduce the SQL fragmentation immediately or during off-peak hours, all. Reorganizing an index defragments the leaf level of an index by physically re-ordering pages to match the logical order. SQL Server A family of Microsoft relational database management and analysis systems for e-commerce, line-of-business, and data warehousing solutions. To check for index fragmentation using SSMS, open Object Explorer and navigate to the index you want to check. name AS IndexName, qs. Thanks for the info on Showcontig and Index Defragmentation. If not specified, all non-system databases plus msdb and model will be defragmented. When you create a clustered index, it reorders the rows of a table in addition to creating the CIX (a table with no CIX is a heap). If you need more tempdb space, you can scale up the data warehouse. A disk defragmenter moves all files, including the database file, into contiguous clusters on a hard disk. A non-clustered index is the other main type of index used in SQL Server. It will do: Nothing if the fragmentation level is below 5%;. 1. the filegroup of the index. Veritas now uses the heavily debated command DBCC SHOWCONTIG WITH ALL_INDEXES,or DBCC SHOWCONTIG WITH ALL_INDEXES,tableresults (Table results will give you a table format to read) to. @dbScope specifies a database name to defrag. ; @dbScope specifies a database name to defrag. (Look in the Misconceptions blog category for the rest of the month’s posts and check out the 60-page PDF with all the myths and misconceptions blog posts collected together when you join our Insider list, plus my online Myths and Misconceptions. Its wide range of features allows users to create and. Otherwise, nothing special. SQL Server does not maintain when an Index was last rebuild, instead it keeps information when stats were last updated. Defragmenting an Index. Reports index length stats for indexes who's lengths exceeding parametrized thresholds (defaults to 0 - get all) for total length and seek length. 7, on any database context you choose to create the usp_AdaptiveIndexDefrag and its supporting objects, open the attached script, and. Internal fragmentation means there is free space inside the data pages rather than having them fully packed with row data. So now, we have identified all the fragmented indexes, how to defrag them? That is our next blog 😊. This point here is extremely important. Or with other fill factors I tested: - Setting a Fill factor of 80 on the clustered index (Fragmentation > 98%. Sql server 2005 needs daily index defrag. Product REBUILD WITH (FILLFACTOR = 80, SORT_IN_TEMPDB = ON, STATISTICS_NORECOMPUTE = ON);. If you don't want to grant so granular. Hi, The widely used thresholds are: Reorganize if fragmentation is between 10-30%. Set the lower limit, as a percentage, for medium fragmentation. April 29, 2010. When using EXECUTES to rebuild and exclude indexes from the defrag SP, I receive the following errors: Msg 50000, Level 16, State 1, Procedure IndexOptimize, Line 918 The value for the parameter @Indexes is not supported. As people have mentioned here, your indexes do not automatically rebuild. dm_ db_ index_ physical_ stats (in 2005+). Added support for indexes with the ALLOW_PAGE_LOCKS option. Use the script below to perform test inserts into this table. For more, read my post: Stop Worrying About Index Fragmentation. I'd rebuild stats every night at least. Sure, the database files are still in access by the running Sql Server service, but it is possible to defrag them and it takes effect. go. Analysing the results of both the DBCC DBReIndex and the Alter Index Rebuild the percentage of fragmentation after the command was run is the same but there is a big difference in the amount of time to complete the operation, nearly 1/3. When I ran the query again, this was the result: Fragmentation over 70% for 12 indexes, over 30% for 15 indexes. We have a database with 2 tables, one with hundreds of millions of rows (row size<1KB), another 14 million rows. The DBCC Defrags will put the data in better order. It is very common to see big increase in performance after optimizing your SQL indexes. SQL DEFRAG MANAGER. Contact the manufacturer of the defragmentation tool to learn how files are locked and how this could affect SQL Server concurrency. Watch on. Hello Marcos, I can't confirm this. You're allowed to define online/offline rebuilds, reorganizations, stats updates, partition level operations, etc. In SQL 2005, you can query DMV sys. Review ALTER INDEX command on MSDN. A proper query analysis plan has to be built and followed. In older versions of SQL Sentry, this feature is disabled by default. ApexSQL Defrag is a powerful application used for scheduled analyzing and defragmenting of SQL Server database indexes. Defragmentation in Practice. The link points to SQL Server 2014 docs, but the syntax should work on 2005 and 2008 as well. Delete the database with fragmented MDF file. Your primary concern is getting your SQL Server back online. DBREINDEX = REBUILD option "Rebuilding Indexes". In this case Reorganize option is selected: Databases with no index defragmentation were an average of 5% fragmented. Your best assistant here is our SQL Defrag feature, seamlessly integrated with dbForge Studio for SQL Server . This article shows an example of how to manually perform defragmentation on an index using SQL Management Studio. ; usp_AdaptiveIndexDefrag_PurgeLogs, which will purge the log tables of data older than 90 days, to avoid indefinite growth. Index still fragmented right after rebuilding it (SQL Server) 1. In the Indexes folder, expand the file. With both SQL 2000 and SQL 2005 and later versions you can get the fragmentation information by using the DBCC SHOWCONTIG command. December 16, 2013 10:03 am. This script does basic maintenance tasks on SUSDB: Identifies indexes that are fragmented, and defragments them. Kalman Toth, SQL Server & BI Training; SQL 2008 GRAND SLAM. SQL - defragmenting an index on a compressed table. dm_db_index_physical_stats function is the preferred tool to use to check index fragmentation on any CA or DA database table. Only files marked by the system as "not moveable" can't be defragmented. Leverage solutions such as Adaptive Index Defrag to automatically manage index defragmentation and statistics updates for one or more databases. Sorted by: 1. Product', PK_Product_ProductID); GO. [index_id] , idx. Product table in the AdventureWorks2022 database. So let’s take one thing at a time. This new DMF ( sys. Review Using SQL Server DMVs to Identify Missing Indexes tip. You have the options in the Plan for shrinking the database and defragging existing indexes. Double Click on one of the SQL Statements. Yes, rebuilding indexes will take a toll on your transaction log file. There are two types of fragmentation: Internal Fragmentation and External Fragmentation. Azure SQL Database is a PaaS solution for migrating your on-premises databases to the Azure cloud infrastructure. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance SQL Server, Azure SQL Database, and Azure SQL Managed Instance support table and index partitioning. Indexes were 75% fragmented. alter index ci on t_ci reorganize -- measure the fragementation select avg_fragmentation_in_percent, avg_fragment_size_in_pages, fragment_count, avg_page_space_used_in_percentAWS Improving database optimization doc article provides information about Rebuild Indexes and Update Statistics. "SQL Fool") has an automated index. /*Perform a 'USE <database name>' to select the database in which to run the script. Right-click on the index and select Rebuild. Index names must follow the rules of. This should not be a problem. There are three options to remove fragmentation in heaps: Create a clustered index and drop it once it is completed. Aug 26, 2015 at 15:42. Reorganizing an index defragments the leaf level of an index by physically re-ordering pages to match the logical order. If avg_fragmentation_in_percent value is > 5% and < = 30% then you should Reorganize Index. 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. 31, the table and index data collection is enabled by default during installation. Defragment on-demand and via schedules. ApexSQL Defrag tool is a 3 rd party SQL index defragmentation tool that you can easily use to perform number of operations related to the SQL Server indexes. The automation built into SQL Defrag Manager enables you to implement a "setThis is one of the optimizations SQL Server does when. Over time, the indexes created for an SQL Server database can become fragmented. Reorganize or rebuild an index SQL Server Management Studio. Reference: Pinal Dave (I had some indexes on a table with around 700m rows that I couldn't defragment below around 30%. Fragmentation. I made them up. DM_DB_INDEX_PHYSICAL_STATS DMV displays fragmentation information for the data and indexes of the specified object. SQL Server Index Defragmentation. You always has some "white noise", so to speak. In this article, I will provide a mechanism for automating SQL Server index defragmentation implemented in a database used in the company I work for. To correct index fragmentation, you can reorganize an index or rebuild an. If you want to run it on every user database on your server, simply replace DB_ID () with NULL in the call to sys. DON’T: Update records to make them longer. Alter Index Rebuild – 217454 ms (218 secs or just under 4 minutes to complete). The DBCC SHOWCONTIG statement traverses the page chain at the leaf level of the specified index when index_id is specified. SQL Sentry Fragmentation Manager helps you make intelligent decisions about index management based on the table and index information collected. When auto-index defragmentation is enabled in Orion, databasemaintinence will sometimes fail to defragment highly fragmented indexes will get defragmented during the Orion database maintenance, which runs at 2:15 AM by default. SQL Defrag Manager is a powerful solution that automates and optimizes your SQL Server database defragmentation. Otherwise you could just reindex the lot, but you'll. The "index optimize" job created by Ola's install script focuses on defragmentation, not statistics update. 1. Any fragmented indexes with over 15% fragmentation will appear here. how to find out defragment index pages in sql server 2008 using script? 0. This white paper compares two of those statements: DBCC DBREINDEX and DBCC INDEXDEFRAG. 4. The database is using the SIMPLE recovery model. Having said that, fragmented data can produce unnecessary reads thereby. With both SQL 2000 and SQL 2005 and later versions you can get the fragmentation information by using the DBCC SHOWCONTIG command. [index_id] The name of the index. If only table_id is specified or if index_id is 0, the data pages of the specified table are scanned. These scripts are widely tested in the community and are much flexible so that you. Otherwise, nothing special. So we defragment and build indexes twice a week. 0. December 8, 2009. Defragmentation in Practice. The following example defragments all partitions of the PK_Product_ProductID index in the Production. Try to use another defrag tool that let you defrag the free space (I use Defraggler from Piriform. dm_db_index_physical_stats in SQL Server 2005 and later. Until yesterday, we always limited the WHERE-clause: where date > '20180101'. It is very common to see big increase in performance after optimizing your SQL indexes. If it does not, the table is considered a HEAP. A new window. I would run it every night, personally, as a general rule. 0. Before SQL Server 2005 (9. 2. In this blog post, I’m going to discuss index fragmentation, several ways you can identify it, and why a more granular approach. Receive email notifications for policy and. set @current_sql = (select top 1 Reorganize_SQL from @fragmented_indexes) execute sp_executesql @current_sql--select. dm_db_index_physical_stats there you can detect fragmentation in a specific index, all indexes on a table or indexed view, all indexes in a database, or all indexes in all databases. If an index is between 10% and 30% fragmented, I will REORGANIZE the index and UPDATE the statistics. Indexes with small number of pages (<1000) will usually. Defrag indexes on very large production tables. ApexSQL Defrag is a SQL Server index monitoring and analysis 3 rd party tool that is used to monitor and manage SQL index defragmentation operations in SQL Server. Database Console Command statements are grouped into the following categories. dm_db_index. In this article, I will provide a mechanism for automating SQL Server index defragmentation implemented in a database used in the company I work for. When you dig down through my computer to the properties for the drives, and hit the "defragment" button on. It does exactly that if ON. February 6, 2019. Extra disk space required during SQL Server online index rebuilds. SQL Server index. 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. I have a mssql database, we'll call it: mssqlDB01. alloc_unit_type_desc FROM sys. SQL Server locks acquired with SQL Server online index rebuilds. Database size was ~66GB. 4 Answers. Features: Supports Microsoft SQL Server 2005, 2008, 2008R2, 2012, 2014, 2016 and 2017 CTP2. You also can create a linked server to SQLAZURE and create a sql agent job. It’s advisable to remove those often. The index on my RDS 2012 R2 server is growing out of control. We defrag if the index is large, otherwise reindex. Now SQL have 4 threads to the database and not one. With ApexSQL Defrag you can rebuild or reorganize fragmented indexes in real time, as well as create policies and apply them to multiple databases or servers. SQL will order its data file, but that is still subject to the OS's allocation of physical space for that file. DBCC DBREINDEX('TableName') will rebuild the indexes on the table. This REBUILD option is available in SQL Server 2008 onwards. [object_id] AND [ips]. ALTER DATABASE [Inter3112] SET OFFLINE GO. Maintenance tasks on a database, index, or filegroup. Expand the Tables folder. Prioritize defragmentation by fragmentation level, scan density, and index size. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) Columnstore indexes are the standard for storing and querying large data warehousing fact tables. The wise use of indexes is a proven method of improving database performance. Lock durations are short and will cause minimal blocking of queries. SQL Defrag Manager improves server performance by detecting fragmentation hot spots and automatically defragmenting them. 1 Answer. Fragmentation >=30 AND PAGES>1000 then. Rob Sheldon tackles the subject of Index Defragmentation in SQL Server 2005 and 2008, using the sys. This puts unnecessary pressure on the buffer pool and also negatively impacts. In order to solve this problem, it is necessary to start with analyzing the index and evaluating the degree of its fragmentation. For SQL Server, I wouldn't recommend defragmenting the data files or log files unless the server is at low load, but it can help. 2005, but if you read around the 'net you'll find many more references to choose to rebuild your indexes via the ALTER INDEX command, which is new for SQL Server 2005. Create/restore new database from the recently created backup. DON’T: Insert records with random key values. Speaking for SQL Server, I tend to choose a index size and index fragmentation level at which point I begin performing index maintenance. In 2016, auto update of stats have been enabled for most databases. Kalman, When you use keyword ALL you do not specify particular index name instead you just specify table name. You don't mention what tool you're using to defrag the disk, I supose it's the standard Disk Defragmenter. For an example, see the SQL Server index and statistics. The first time you enable it, the Fragmentation ManagerWizard displays. Index automation Job script. Maintenance. SQL Server 2008 index fragmentation problem. I know that there are really three kinds of fragmentation that I need to be concerned about as a DBA: Index Fragmentation in the SQL data files, including clustered index (table) fragmentation. A. Particularly if you are in full recovery. Make complete backup to a different partition. The length of time the rebuild takes is related to the size of the index, not the amount of fragmentation in it. This generates a fragmentation of this clustered index of more than 99% (with default Fill factor). sqrt"(2. The general consensus is if fragmentation is: Less than 10% – there is no need to do anything to the index. dm_db_index_physical_stats(DB_ID(N'XXXMYDATABASEXXX'),. – Dave Mason. You have the option LOB_COMPACTION. Share. Any indexes above 50% in fragmentation percentages that affect more than 4000 rows are bad, and the system performance can significantly benefit from defragmenting the indexes. dm_db_index_physical_stats(DB_ID(N'XXXMYDATABASEXXX'), OBJECT_ID(N'XXXMYTABLEXXX'), NULL, NULL, NULL) AS [ips] INNER JOIN sys. SQL - defragmenting an index on a compressed table. Index Defragmentation is one of the key processes to significantly improve performance of any database. SQL will order its data file, but that is still subject to the OS's allocation of physical space for that file. Stats will not be updated if you perform a rebuild. Aaron Bertrand April 13th, 2009 SQL Server 3. Based on the query analysis output, rebuilding or reorganization of indexes must be done. I want to defrag tables in sql server, I used this code to know the fragmented indexes: sELECT dbschemas. But think it through. SQL Server Internal Fragmentation SQL Server Internal Fragmentation is caused by pages that have too much free space. Usage involves setting the following five parameters (technically, variables) at the top of the script: @DATABASE_NAME: set to whatever database you want to check for fragmented indexes. This can be checked using:. Leverage solutions such as Adaptive Index Defrag to automatically manage index defragmentation and statistics updates for one or more databases. 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): For more instructions see the official docs. Fragmentation can be defined as any condition that cause more than optimal amount of disk I/O to be performed in accessing a table or cause the longer disk I/O. Note that a heap index number will be zero. MadhuQ1: There is no good way to check for all forms of fragmentation in either the data or the secondary indexes. 1. All they do is waste space and resources. Script to Manage SQL Server Rebuilds and Reorganize for Index Fragmentation. Store the data in a temporary table, truncate the old data, and re-insert the data back. Identify and remove index fragmentation – this is obviously what we have been talking until now and the biggest part of the SQL index maintenance.