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. SQL Defrag Manager offers a totally new way to identify, optimize, manage and automate SQL Server defragmentation. Before SQL Server 2005 (9. 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. It is a managed service and Azure manages the infrastructure, database availability, backup restore, and compute resources. Index names must be unique within a table or view but don't have to be unique within a database. For those unfamiliar with this object, it defragments indexes in SQL Server 2005 using the ALTER INDEX command. To test this you can comment out (or remove completely) the line second from the bottom with two minus signs (--). These commands are great, but you really need to collect the information and then. Coworker started REBUILD on both tables. Let’s say N […] How Fragmentation Hurts SQL Server Performance. Fragmentation >=30 AND PAGES>1000 then. Try this code, This will defragment your all indexes based on the fragmentation level. The first time you enable it, the Fragmentation ManagerWizard displays. 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. Identify and remove index fragmentation – this is obviously what we have been talking until now and the biggest part of the SQL index maintenance. This should be part of our SQL Server Maintenance jobs. What is Fragmentation. The automation built into SQL Defrag Manager enables you to implement a "setThis is one of the optimizations SQL Server does when. 00 am - Index defrag' : Step 1, 'run index defrag' : Began Executing 2012-06-27 02:00:05 DBCC: Defrag phase of index 'table1_pk_index' is 27% complete. From what we can tell, SQL Server does not conduct any internal maintenance on the system base tables, meaning that they can become very fragmented over time and bloated in size. INDEXDEFRAG = defragments page by page. The index on my RDS 2012 R2 server is growing out of control. I teach the MS 2073 class quite a bit and the course material just. With spinning disks, this can be bad. Monthly – 17% fragmented. 3. While you are at it, by all means, use FILLFACTOR, to reduce future fragmentation. This article shows an example of how to manually perform defragmentation on an index using SQL Management Studio. Review Using SQL Server DMVs to Identify Missing Indexes tip. It reorgs indexes when fragmentation is below 30% else it rebuild the index. Paul Randal. This can be demonstrated by small test. Thus it is not advised to run index rebuild during operational hours only during maintenance windows. Burt King. (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. Reorganizing an index defragments the leaf level of an index by physically re-ordering pages to match the logical order. Two types of fragmentation can afflict SQL Server indexes and consequently the performance of your databases. Greater than 30% – rebuilding the index with the REBUILD option is probably the best option. lang. But think it through. 19. Why, when and how to rebuild and reorganize SQL Server indexes. Azure Automation: Automate Azure SQL Database indexes and statistics maintenance. I have been trying to defrag indexes in SQL Server 2005 and nothing seems to work. The only way to get rid of this fragmentation is to rebuild both the non-clustered index and the clustered index. A starting point could be looking at the queries being executed on your server. g. In this type of index, a pointer to the actual table data is stored in the leaf node. 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. There's a general consensus that you should reorganize ("defragment") your indices as soon as index fragmentation reaches more than 5 (sometimes 10%), and you should rebuild them completely when it goes beyond 30% (at least that's the numbers I've heard advocated in a lot of places). Daily – 6% fragmented. Double Click on one of the SQL. Normal Windows defrag cannot defrag open files. Often, this is not enough to perform index. 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. Your could find your indexes are 95% plus fragmented, affecting query performance badly. Use DBCC INDEXDEFRAG to defragment an index. 1. List the Indexes. It is probably better to use the first parameter of sys. 59. It's. 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. For example, one of the indexes with a page_count of 967 has a fragmentation percentage. 0. A SQL Server DBA myth a day: (29/30) fixing heap fragmentation. 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. Go to DBACOCKPIT –> Performance –> SQL Statements. Specify. When I got the stats from dm_db_index_physical_stats , there were still 27 records which needed defrag and all of theses were NON CLUSTERED Indexes. You can use SQL Server Management Studio (SSMS) or T-SQL to get started managing index fragmentation. I'd rebuild stats every night at least. To create a linked server to azure, you can see this SO link:I need to add a linked server to a MS Azure SQL Server SQL SERVER – Fragmentation – Detect Fragmentation and Eliminate Fragmentation SQL SERVER – 2005 – Display Fragmentation Information of Data and Indexes of Database Table SQL SERVER – De-fragmentation of Database at Operating System to Improve Performance. For an Azure SQL Data Warehouse table with an ordered clustered columnstore index, ALTER INDEX REBUILD will re-sort the data. No, there is no auto-magical defragging of indexes. Everything worked fine. In older versions of SQL Sentry, this feature is disabled by default. You have the option LOB_COMPACTION. ALTER INDEX ALL ON Production. DBREINDEX = REBUILD option "Rebuilding Indexes". Maintenance. Chad Boyd. a. Last week I decided to play with SQLFool's Automated Index Defrag Script and found it very usable and worthwhile. One of the biggest performance hits that you will see on your databases, next to not having indexes, is indexes that are very fragmented. We are constrained to use Indexdefrag as we may not take down servers UNLESS there is a breakage that. From what we can tell, SQL Server does not conduct any internal maintenance on the system base tables, meaning that they can become very fragmented over time and bloated in size. Rebuild if > 30%. 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. This tool provides index analysis to manage index defragmentation, including rebuild and reorganize fragmented indexes . A starting point for you could be to run a maintenance plan against this database. I have a weekly process that does all of my database checks, etc. No, there is no auto-magical defragging of indexes. 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. ) Then rerun the above free-space query again to see how the shrink worked: Free space after. fragmentation is the index value, described in percentages, which can easily be fetched by the SQL Server DMV. Enter a Name and Description for the agent job, and then select OK. In the heap tables, the absence of the clustered index means that the data. Artemakis Artemiou. Let the internal health rule which takes care of index fragmentation run. If avg_fragmentation_in_percent value is > 5% and < = 30% then you should Reorganize Index. Let’s use DBCC SHRINKDATABASE to reclaim the empty space. It does exactly that if ON. Index reorganization is a process where the SQL Server goes through existing index, and cleans it up. Indexes were 75% fragmented. The datafile is also showing as 220gb but the actual space used is 140gb. * The nonclustered index is fairly wide, with lots of columns * The clustered index is relatively narrow (doesn’t have many more fields than the nonclustered, especially big varchar fields) * The nonclustered index has extremely bad internal fragmentation * The clustered index has nearly no fragmentation (quite an interesting combination)Mar 8, 2021, 2:47 PM. Here are the MS guidelines. Fragmentation causes issues where it takes SQL Server more time to traverse the index tree to find the necessary records. I have a question about index maintenance. Over time, the indexes created for an SQL Server database can become fragmented. dm_db_index_physical_stats ‘ Dynamic Management View (DMV). Create a execute sql task and schedule it through sql agent . Now we will see how to defrag indexes. 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. Heavily fragmented Indexes - SQL Server 2005. dm_db_index_physical_stats to get information about your index fragmentation (see the avg_fragmentation_in_percent column). Its wide range of features allows users to create and. Defaults to 480m (8h). Index fragments occur when any transaction takes place in database table. Leverage solutions such as Adaptive Index Defrag to automatically manage index defragmentation and statistics updates for one or more databases. This will block all queries to that table using the index till the index defrag is finished. Review ALTER INDEX command on MSDN. and a weekly rebuilding of indexes. Using SQL Server Managed Lock Priority for Online Index Rebuilds. dm_db_index_physical_stats in SQL Server 2005 and later. According to the index performance value, users can take the indexes in maintenance by revising the fragmentation percentage with the help of Rebuild or Reorganize operation. SQL Server A family of Microsoft relational database management and analysis systems for e-commerce, line-of-business, and data warehousing solutions. This is what we call external fragmentation. Reference: Pinal Dave (I had some indexes on a table with around 700m rows that I couldn't defragment below around 30%. Fortunately, like Windows 7, Server 2008 can on a schedule defrag. Expand the table on which you want to reorganize an index. We have a Non-Clustered index on the varbinary field and our index maintenance scripts perform a REORGANIZE on this every 2-3 days. Now, all you have to do is download the T-SQL script, execute it on your Azure SQL DB and execute the maintenance procedure. All the Clustered indexes were fixed. Locking. 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. dm_db_index_physical_stats (DB_ID(), NULL, NULL,. The method (not a trick), therefore, is to Create Clustered Index only for the purpose of de-fragmenting the Heap, and drop it afterward. 31, the table and index data collection is enabled by default during installation. SQL Server Internal Fragmentation SQL Server Internal Fragmentation is caused by pages that have too much. Only indexes with > 10,000 pages will be touched. On the right panel, right-click SQL Server Agent. SQL Defrag Manager offers a totally new way to identify, optimize, manage and automate SQL Server defragmentation. Working this way is usually optimal, since SQL Server does not have to update the NCIs while the data is being imported. Run sys. Miscellaneous tasks such as enabling trace flags or removing a DLL. SELECT OBJECT_NAME (fq. For the SQL Servers we manage for our clients, we use. Thanks for the info on Showcontig and Index Defragmentation. avg_page_space_used_in_percent, ips. Index fragments occur when any transaction takes place in database table. To enable the Database Rebuild Index, we could go through this path: Site > Site Maintenance > Edit the Maintenance task. To create a linked server to azure, you can see this SO link:I need to add a linked server to a MS Azure SQL ServerSQL SERVER – Fragmentation – Detect Fragmentation and Eliminate Fragmentation SQL SERVER – 2005 – Display Fragmentation Information of Data and Indexes of Database Table SQL SERVER – De-fragmentation of Database at Operating System to Improve Performance. SQL Server does not maintain when an Index was last rebuild, instead it keeps information when stats were last updated. Some things I've tried: Rebuilding the indexes: ALTER INDEX ALL ON dbo. 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. Index Defragmentation is one of the key processes to significantly improve performance of any database. It is very common to see big increase in performance after optimizing your SQL indexes. From that you can easily run a defrag on each index as follows DBCC INDEXDEFRAG (8, 1113627606, 5) DBCC INDEXDEFRAG (8, 1113627606, 2). Lines 469-480 set up the dynamic SQL to rebuild the specified index for. ApexSQL Defrag is a powerful application used for scheduled analyzing and defragmenting of SQL Server database indexes. Aug 26, 2015 at 15:42. Make sure to thick the Enabled checkbox. x) Service Pack 2, executing DBCC CHECKDB clears the plan cache. Indexes with small number of pages (<1000) will usually. There are several types of fragmentation that can occur. SQL Defrag Manager is described as 'Find and Fix SQL Fragmentation' and is a Defrag tool in the development category. Fragmentation. Your best assistant here is our SQL Defrag feature, seamlessly integrated with dbForge Studio for SQL Server . 1 Answer. Daily – 6% fragmented. It appears to be a bug in 2012 R2. In addition, SQL Server offers several different ways to perform index defragmentation. avg_fragmentation_in_percent > 5 AND indexstats. Defragment on-demand and via schedules. Manually shrinking or growing files using T-SQL commands can also contribute to physical file fragmentation. One of the biggest performance hits that you will see on your databases, next to not having indexes, is indexes that are very fragmented. The general consensus is if fragmentation is: Less than 10% – there is no need to do anything to the index. The above query is database specific. go. Note that the time limit is checked BEFORE an index defrag begins, thus a long index defrag can exceed the time limit. DBCC IndexDefrag – 1015984 ms (1,016 secs or just under 17 minutes to complete) 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. Defaults to 480m (8h). This is other myth which needs attention. As people have mentioned here, your indexes do not automatically rebuild. We do create indexes to improve the search performance of our queries. Here are the changes: Added support for database and object names with special characters. Defragmentation utilities may lock sections of the file, preventing SQL Server from completing a read or write operation. This database has a few hundred tables and each table has a range of 1 to 15 indexes per table. We have a SQL 2016 database that has a 1. Missed Connection: Employer Seeking Employee. This may affect the concurrency of the server that's running SQL Server. Review Deeper insight into unused indexes for SQL Server tip. fulltext_index_fragments catalog view can be used to query the number of fragments comprising a full-text index. Hi, The widely used thresholds are: Reorganize if fragmentation is between 10-30%. Identify and remove index fragmentation – this is obviously what we have been talking until now and the biggest part of the SQL index maintenance. Then we can use contig [Filename] as shown below to defragment. Fortunately, like Windows 7, Server 2008 can on a schedule defrag. SQL Defrag Manager offers a totally new way to identify, optimize, manage and automate SQL Server defragmentation. This tip provides a fully parameterized T-SQL script which identifies only the fragmented indexes in a database or in all databases in a SQL Server instance, and either generates a report with the defragmentation commands for review and controlled execution, or directly reorganizes or rebuilds the fragmented indexes based on Microsoft's. Weekly – 3% fragmented. This means you can grant alter table on every table of interest that already exists. No matter how many times I run the script to defrag these records, I still have the same indexes to be defraged and most of them with the same. Fragmented indexes will primarily slow down ‘search’ performance. In that case, the Storage Engine creates a new, empty page and moves 50 % of the rows (usually, but not always) from the full page to the new page. Also even though SQL allocates in 8K blocks having to move the disk head all over the place leads to much slower access times. Share. Indexes were 75% fragmented. The defragmentation of a heavily fragmented index can generate more log than a fully logged index creation. December 8, 2009. 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. DBREINDEX will always defragment as clean copies are made whereas INDEXDEFRAG churns pages. We also checked the indexes of the tables that are accessed sequentially on process overview. Contact the manufacturer of the defragmentation tool to learn how files are locked and how this could affect SQL Server concurrency. If no results are returned it may be because you are running the script against the wrong SQL database or that there are no indexes with fragmentation above 15%. It makes your indexes larger and many operations slower by making the SQL Server access more pages than necessary. This is called fragmentation. 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. It is designed specifically to overcome the compromises DBAs have to make regarding the important task of index fragmentation maintenance. In Update Statistics they mention one of the solutions:. 0. Watch this video by List the Indexes. An index rebuild will always build a new index, even if there’s no fragmentation. Index names must follow the rules of. When we were listing the fragmanted indexes our scope was on the indexes that are used in expensive SQL Statements. In Object Explorer, Expand the database that contains the table on which you want to reorganize an index. This new DMF ( sys. Starting Price: $1,196 per. On the third pass, SQL Server swaps the next physical page (4) with the next logical page (3). Indexes with small number of pages (<1000) will usually. Online vs offline SQL Server index rebuild in SQL Server. We have decided to use the following code to compute a fragmentation % for each full-text index. 3. physical defragmentation by orders of magnitude. Logical consistency checking on indexes varies. Lines 436-443 setup the dynamic SQL to rebuild the index with the specified fill factor if the table is not partitioned. Optimal. An SQL index is a small and organized lookup table, allowing the SQL Server engine to quickly locate the requested rows of a database table without scanning the entire table. Example: Name: Indexrebuild_job; Description: RDS for SQL server agent job for index rebuild. ApexSQL Defrag is a powerful application used for scheduled analyzing and defragmenting of SQL Server database indexes. I would highly recommend using a tool specific to sql server to defragment the drive(s) on which the files sit. Like Ola's scripts, mine only defrag indexes that need it. Option 2: rebuild/defrag indexes on the new box after the restore. Set the lower limit, as a percentage, for medium fragmentation. But only if the index is bigger than a small-thing (I forget exactly, but some really small tables appeared frag'd immediatly after reindex), and is more than 20% fragmentated. SQL Defrag Manager is a unique SQL Server index defragmentation solution that automates the time-consuming process of finding fragmented indexes based on parameters that you define within a policy for the targeted database. Reorganizing an index defragments the leaf level of an index by physically re-ordering pages to match the logical order. Open-file defragmenting affects performance. 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. 0 databases. For those unfamiliar with this object, it defragments indexes in SQL Server 2005 using the ALTER INDEX command. Index fragmentation can cause high CPU usage, which means disk usage, and therefore performance degradation. Monthly – 17% fragmented. Index fragmentation at a filesystem level really only hurts two things, the first of those is read-ahead which. g. [object_id] = [idx]. Receive email notifications for policy and. dm_db_index_physical_stats function is the preferred tool to use to check index fragmentation on any CA or DA database table. Go to DBACOCKPIT –> Performance –> SQL Statements. #1637994. It’s advisable to remove those often. ALTER DATABASE [Inter3112] SET OFFLINE GO. Expand the Indexes. 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. Watch this video by @A_Bansal to understand index fragmentation & page splits. However, the defragmentation is performed as a series of short transactions, so a large log is unnecessary if log backups are taken frequently or if the recovery model setting is. When you dig down through my computer to the properties for the drives, and hit the "defragment" button on. Review SQL Server script to rebuild all indexes for all tables and all databases tip. 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. The DB restore may de-fragment (physically) at the disk level, but there will still be the same internal fragmentation at the page level. From this tab, select a SQL Server instance in the server explorer on the left and choose database (s) as a target of index operation. A very fragmented index might take considerably longer to defragment than to rebuild. 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. Also need to defragment the tables, since the allocations within. As of version 2020. Improve this answer. If it grows often, it could concievably become fragmented. @dbScope specifies a database name to defrag. DBCC DBReIndex – 356610 ms (357 secs or just under 6 minutes to complete). Even though it should be safe, I would not want to defrag disks in Production while SQL is running. Otherwise, nothing special. February 6, 2019. It’s a tool that simplifies the management of SQL Server indexes across your organization. Weekly – 3% fragmented. The index fragmentation is the index performance value in percentage, which can be fetched by SQL Server DMV. Rebuild if > 30%. Open the Tables folder & expand it. Not so much if the file is spread out all over the disk. Until yesterday, we always limited the WHERE-clause: where date > '20180101'. (SQL Server) How to defragment indexes with LOBs? 1. Below is the output of database data file size and. -- Compute fragmentation information for all full-text indexes on the database SELECT c. 2. The sys. Auto shrink is a database option that is used to conserve disk space. Custom SQL Server Index Defrag and Rebuild Procedures. 16. 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. Find and remove unused indexes – everything that is unused doesn’t do anything good. Identify Skewed and Outdated Index and Column Statistics and Ensure they are Representative and Up-to-DateAs stated though you would need to shutdown SQL Server, or at least take the DB offline to do an OS Defrag. This reversed the defragmentation step and gave them a database with nearly 100% fragmentation. Why do you think defragging is an operation eligible for minimal logging? I don. INSERT INTO [dbo]. Reorganize indexes in a table using Transact-SQL. Aaron Bertrand April 13th, 2009 SQL Server 3. It will do: Nothing if the fragmentation level is below 5%;. Pre-allocate space for tempdb (approximately 20-25% of the size of MEM’s database) Set the file growth increment to a reasonable size. – Dave Mason. SELECT ips. 1. The best recommendation I have is to create your own procedure which loops through the tables of the database and runs DBCC INDEXDEFRAG. A disk defragmenter moves all files, including the database file, into contiguous clusters on a hard disk. We have several databases in which a large number of tables are created and dropped. In our previous blog post, we got to know, how to find out all fragmented indexes in a database. sqrt"(2. */Effective database performance tuning often relies on having precise database insights to determine actual root causes. It depends on the degree of fragmentation of Indexes. Coworker started REBUILD on both tables. Fragmentation. This to me would be a sign that constant rebuilds of that index actually aren't a good help. 25. The Server is running SQL Server 2017 (RTM-GDR) (KB4505224) - 14. name AS index_name, i. SELECT CASE WHEN indexstats. SQL Server 2000 introduces a new DBCC INDEXDEFRAG statement to defragment clustered and nonclustered indexes on tables and views. The issue was not enough contiguous free space inside the database to arrange the index consecutively. It can be done with online option in enterprise edition. The execute sql task should contain the index rebuild code along with stats rebuild . Based on the. Otherwise you could just reindex the lot, but you'll. Now understand that logical fragmentation is not introduction of free space or some kind of space between rows present in index. It was noticed that the data has high fragmentation. If you have fragmentation, you need to REBUILD or REORGANIZE. The application allows detailed index fragmentation analysis on server, database and table level. 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. It creates a thread that runs periodically to detect when the database has more than 25% free disk space allocated to it. When the rebuild is finished, SQL Server deletes the original clustered columnstore index. Reduce page splits with index fill. The Ultimate Index Width Stats Reporter. This job needs to be scheduled and ran on a weekly basis due to large data load. In this Article, I am sharing T-SQL Script to find the Index Fragmentation report for SQL Server User database. 31 and later, this feature is enabled by default for all targets. Michelle Ufford (a. Create/restore new database from the recently created backup. Let it autogrow with at least 200 MB at the time. SQL SERVER – 2005 – A Simple Way To Defragment All Indexes In A Database That Is Fragmented Above A Declared Threshold. It is designed. Click OK. This white paper provides information to help you determine whether you should defragment table indexes to benefit workload performance. Automate defragmentation policies to multiple databases, tables, and indexes. So now, we have identified all the fragmented indexes, how to defrag them? That is our next blog 😊. Let us create a Heap Table and insert some records in it and then check the fragmentation. Double Click on one of the SQL Statements. page_count FROM sys. dm_db_index_physical_stats to filter on db instead of the where clause ips. OBJECT_ID) AS TableName, fq. Terrific work Michelle! The script rivals Ola Hallengren's broader maintenance scripts that I use often. If you need more tempdb space, you can scale up the data warehouse. Defragment indexes on your SQL SCCM database every night. If a particular index has been nominated as the clustering index for a table, then psql's d command will indicate the clustered index, e. select object_name(IPS. MDF is contiguous on disk. The re-inserting of the data in PK order assures that the data is well-defragmented. 8. It can be turned on by using the in-app wizard in any version. USE DatabaseName –Need to Specify the User Database Name. 2 Answers. Check the comment header block for its documentation. Modified 13 years ago. Hello Marcos, I can't confirm this. It automates the time-consuming process of finding fragmented indexes based on policies for the targeted databases. Here are the changes: Added support for database and object names with special characters. You can also change this threshold via parameters. To reduce tempdb contention, divide the database file into multiple files of equal size. MS SQL Server always updates index statistics whenever an Insertion, Updating, or Deletion activity is performed on the . When i try to defrag them using ALTER INDEX. I do not understand the distinct, group by or sum(row_count) clauses. In fact, once you start focusing on defragmentation at the SQL Server level – whether with manual defragmentation or with the automated defragmentation provided with SQL Defrag Manager, you may decideDatabase Index Defragmentation Tool for SQL Server. This procedure automatically chooses. T-SQL script. It depends on the degree of fragmentation of Indexes. This script does basic maintenance tasks on SUSDB: Identifies indexes that are fragmented, and defragments them. 2. Fragmentation typically happens owing to insert, update and delete transactions. So, how to identify the fragmentation of all indexes in a database? Here is the query. Viewed 439 times. To reorganize index SQL Server, right-click it & choose Reorganize. 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. Right-click on the index and select Rebuild. 1. SQL. I've been tasked with performing defragmentation on all of the tables.