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. The SAMPLED mode returns statistics based on a 1 percent sample of all the pages in the index or heap. The tempdb is used a lot – place it on separate drive to the Log and MDF files. SQL Database physical file fragmentation. indexes AS [idx] ON [ips]. The defragmentation schedule must be created manually in all versions. You also can create a linked server to SQLAZURE and create a sql agent job. Now we will see how to defrag indexes. Normal Windows defrag cannot defrag open files. Working this way is usually optimal, since SQL Server does not have to update the NCIs while the data is being imported. Now, if your existing. HeapTest ( Id INT not NULL Default (1), Col1 char (5000) Not null Default ('Heaps Are Cool') ) SET NOCOUNT ON Insert into dbo. In order to test this scenario, we could use the other table we created earlier - Product_B. You can use sys. Basically, do the minimum commensurate with your fragmentation levels. Coworker started REBUILD on both tables. PS: The above script is for row-store indexes. Bad internal fragmentation (having lots of free space on the pages) means the index is bigger than it needs to be. Applies to: SQL Server 2022. How Defragmentation Improves Performance. This may affect the concurrency of the server that's running SQL Server. Now, all you have to do is download the T-SQL script, execute it on your Azure SQL DB and execute the maintenance procedure. Here are the changes: Added support for database and object names with special characters. 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. I have been trying to defrag indexes in SQL Server 2005 and nothing seems to work. The first method is the Fragmentation page of the SQL Server Index Properties window. SQL. SQL Server 2005 and later provides a dynamic management function (DMF) to determine index fragmentation level. The link points to SQL Server 2014 docs, but the syntax should work on 2005 and 2008 as well. As people have mentioned here, your indexes do not automatically rebuild. 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. I'd rebuild stats every night at least. #1637994. 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. With spinning disks, this can be bad. A very fragmented index might take considerably longer to defragment than to rebuild. SQL will order its data file, but that is still subject to the OS's allocation of physical space for that file. SQL Server locks acquired with SQL Server online index rebuilds. (You could even go with 0% if you want. The database is using the SIMPLE recovery model. You should always do some form of intelligent rebuilding - i. From that you can easily run a defrag on each index as follows DBCC INDEXDEFRAG (8, 1113627606, 5) DBCC INDEXDEFRAG (8, 1113627606, 2). Odds are, you’re not actually making things better – you’re making them worse! I explain why in this video: Why Index Fragmentation Doesn't Matter in SQL Server. This should not be a problem. The ALTER INDEX statement shown does not explicitly mention the FILLFACTOR, and hence the rebuilt is done on the basis of the current fillfactor value, leaving a fragmentation that should. SQL Server Index Defragmentation. 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. There are several types of fragmentation that can occur. Index names must follow the rules of identifiers. In a perfect world our C drive would be optimally configured, almost static, but in the real world we often have many files on the C drive including system databases, log files, BCP files etc. dm_db_index_physical_stats. SQL Server. It's not free, so if you're. Logical fragmentation happens when an index leaf page is full and space is required on it, either for an insert or to make an existing record longer (from updating a variable-length column). Let’s say N […] How Fragmentation Hurts SQL Server Performance. August 1, 2013 at 3:52 pm. The application allows detailed index fragmentation analysis on server, database and table level. txt","contentType. Index names must follow the rules of. Missed Connection: Employer Seeking Employee. Reduce page splits with index fill. However, over time and especially when heavy. Select the Compact large object column data checkbox to specify that all pages that contain large object (LOB) data are also compacted. He makes the point that, by analyzing indexes effectively, you can save a lot of. create table dbo. The best recommendation I have is to create your own procedure which loops through the tables of the database and runs DBCC INDEXDEFRAG. If an index is between 10% and 30% fragmented, I will REORGANIZE the index and UPDATE the statistics. SQL Server index. I’m talking about the guidance which is: if an index has less than 1000 pages and is in memory, don’t bother removing fragmentation. Maintenance. This new DMF ( sys. Reorganizing an index only deals with the fragmentation that exists, and the more fragmentation there is, the longer a reorganize will take. Next Steps This is a simple base script that could be modified into a stored procedure and also allow you to pass other parameters such as doing an index. To check for index fragmentation using SSMS, open Object Explorer and navigate to the index you want to check. To work around a very large index that won't defragment, the BEST solution is to pre-size a new database and move all your objects to that DB. For those unfamiliar with this object, it defragments indexes in SQL Server 2005 using the ALTER INDEX command. In the Rebuild Indexes dialog box, verify that the correct index is in the Indexes to be rebuilt grid and click OK. Thanks for the info on Showcontig and Index Defragmentation. Index fragmentation occurs when SQL Server must split a page to allow for the insertion of a new row. 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. 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. This common maintenance task actually causes fragmentation, which is especially terrible if you’re doing both this and defragmenting your indexes. If avg_fragmentation_in_percent value is > 5% and < = 30% then you should Reorganize Index. This REBUILD option is available in SQL Server 2008 onwards. Fairly easily, you can use my sp_RebuildIndexes procedures as a base and then change the code to DEFRAG instead of rebuild. Fragmented indexes will primarily slow down ‘search’ performance. as our primary concentration is to defrag indexes. There are two types of fragmentation: Internal Fragmentation and External Fragmentation. For example, you can use ApexSQL Defrag to review the index usage statistics and apply the suitable. Detach the database. Delete the database with fragmented MDF file. 0. 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 monitor the health of the table indexes when the use of the sys. Check the comment header block for its documentation. Fragmentation. dm_ db_ index_ physical_ stats (in 2005+). ) Then rerun the above free-space query again to see how the shrink worked: Free space after. Quickly find the worst impacting indexes in a color-coded dashboard. Larger indexes have more intermediate levels and pages. That can be found using the STATS_DATE function. This should be part of our SQL Server Maintenance jobs. So, how to identify the fragmentation of all indexes in a database? Here is the query. Logical consistency checking on indexes varies. We would like to show you a description here but the site won’t allow us. 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. " ALTER INDEX MyIndex ON MyTable REORGANIZEThe more keys and included columns, the bigger the indexes get and the longer SQL Server will hold locks to insert, update, and delete data. Example: Name: Indexrebuild_job; Description: RDS for SQL server agent job for index rebuild. This clause is equivalent to DBCC INDEXDEFRAG. Index names must be unique within a table or view but don't have to be unique within a database. Math. This is called fragmentation. Thanks for the info on Showcontig and Index Defragmentation. Alter Index Rebuild – 217454 ms (218 secs or just under 4 minutes to complete). Using SQL Server Managed Lock Priority for Online Index Rebuilds. The automation built into SQL Defrag Manager enables you to implement a "setThis is one of the optimizations SQL Server does when. Open Object Explorer & expand the database containing the table you wish to reorganize. A starting point for you could be to run a maintenance plan against this database. This REBUILD option is available in SQL Server 2008 onwards. Optimal. set @current_sql = (select top 1 Reorganize_SQL from @fragmented_indexes) execute sp_executesql @current_sql--select. When you dig down through my computer to the properties for the drives, and hit the "defragment" button on. Lock durations are short and will cause minimal blocking of queries. For partitioned indexes, sys. The datafile is also showing as 220gb but the actual space used is 140gb. Because the smallest unit of data to be cached is an 8 kB data page, not a single row, it also. dm_db_index_physical_stats ‘ Dynamic Management View (DMV). Identify and remove index fragmentation – this is obviously what we have been talking until now and the biggest part of the SQL index maintenance. _in_percent > 50 AND ss. Not so much if the file is spread out all over the disk. Value : 1. while exists (select top 1 Reorganize_SQL from @fragmented_indexes) begin. Locking. Databases with no index defragmentation were an average of 5% fragmented. 3. Index defragmentation is a part of Microsoft SQL Server maintenance where the index of database engine indexes of insert, update and delete operations is optimized to reduce fragmentation. INDEX DEFRAG on SQL SERVER 2005. or. Artemakis Artemiou. Automate defragmentation policies to multiple databases, tables, and indexes. You don't mention what tool you're using to defrag the disk, I supose it's the standard Disk Defragmenter. I have a weekly process that does all of my database checks, etc. 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 don't want to grant so granular. [object_id]) as [TableName] ,SI. We also checked the indexes of the tables that are accessed sequentially on process overview. * 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. About; Products. In the heap tables, the absence of the clustered index means that the data. Index Defragmentation is one of the key processes to significantly improve performance of any database. Particularly if you are in full recovery. It creates a thread that runs periodically to detect when the database has more than 25% free disk space allocated to it. The DBCC SHOWCONTIG statement traverses the page chain at the leaf level of the specified index when index_id is specified. Starting with SQL Server 2005 the recommended way (required starting in SQL Server Kilimanjaro) to defragment indexes is by using the ALTER INDEX statement with the. Check the comment header block for its documentation. As of version 2020. dm_db_index_physical_stats in SQL Server 2005 and later. Custom SQL Server Index Defrag and Rebuild Procedures. Use the script below to perform test inserts into this table. Heaps will show up in your contig reports, and you can see the fragmentation percentage along with the other index frag stats. Leverage solutions such as Adaptive Index Defrag to automatically manage index defragmentation and statistics updates for one or more databases. It does exactly that if ON. It reorgs indexes when fragmentation is below 30% else it rebuild the index. Indexes were 75% fragmented. First of all you need to find the fragmentation percentage for the indexes in a database or table. List the Indexes. It checks the SQL Server licences, if Enterprise it will rebuild the index online else it. SQL Defrag Manager is a unique SQL Server index defragmentation solution that automates the time-consuming process of finding index fragmentation in SQL Server based on parameters that you define within a policy for the targeted database. Burt King. and less effort from the SQL server thus they can be done in a weeknight type of instances. 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 Server) How to defragment indexes with LOBs? 1. (SQL Server) How to defragment indexes with LOBs? 1. SQL Defrag Manager enables database teams to be more productive while eliminating one source of potential performance problems. Scott Dexter, 2008-08-05 (first published: 2008-06-12) The following is a script that I have worked off and on with until I finally decided that I had worked on it. 1. 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. Reorganizing only works on the leaf pages. Enter single user mode. For a heap, the associated PFS and IAM pages are examined and the data pages of a heap are scanned in LIMITED mode. Index Rebuild vs Index Reorganize. DBREINDEX = rebuild a copy of the index (es) from scratch. It automates the time-consuming process of finding fragmented indexes based on policies for the targeted databases. It shouldn't be used on WSUS 2. Review ALTER INDEX command on MSDN. Its wide range of features allows users to create and. SELECT ips. Starting Price: $1,196 per. In addition, you can use the dynamic management view sys. Prioritize defragmentation by fragmentation level, scan density, and index size. A non-clustered index is the other main type of index used in SQL Server. While index reorganization is a pure cleanup. Yes, this means you implementing things such as the built in index maintenance tasks in SQL Server 2014+, Adaptive Index Defrag, and Ola’s Maintenance Scripts are pretty much worthless at best and downright disastrous at worst. It gives you the flexibility to reduce the SQL fragmentation immediately or during off-peak hours, all. Next Steps This is a simple base script that could be modified into a stored procedure and also allow you to pass other parameters such as. @dbScope specifies a database name to defrag. We are constrained to use Indexdefrag as we may not take down servers UNLESS there is a breakage that. ALTER DATABASE [Inter3112] SET OFFLINE GO. Double Click on one of the SQL. fragmentation is the index value, described in percentages, which can easily be fetched by the SQL Server DMV. Reorganizing an index defragments the leaf level of an index by physically re-ordering pages to match the logical order. According to Microsoft guidelines, based upon index fragmentation percentage, we may choose to either REORGANIZE, REBUILD indexes or just ignore. ApexSQL Defrag is an enterprise SQL Server tool which is used for monitoring, analyzing and managing SQL Server index defragmentation which works down to a single index. is_ms_shipped = 0 --Excludes any objects created as a part of SQL Server installation AND ss. ; @tblName specifies if you only want to defrag indexes for a. If your table has a clustered index, the state of the index reflects the state of the table. Right-click on the index that you need to check and choose the Properties option. In addition, SQL Server offers several different ways to perform index defragmentation. According to. SQL index fragmentation reports. Email alerts can be tailored to inform the staff when fragmentation is necessary and when the process is complete. Two types of fragmentation can afflict SQL Server indexes and consequently the performance of your databases. This generates a fragmentation of this clustered index of more than 99% (with default Fill factor). 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. Watch on. Results still shows high fragmentation, even the application is only used for 2 to 3 days after defragmentation. Remarks. Our Production instance is running SQL Server 2014. 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. . Open the Tables folder & expand it. This internal fragmentation occurs when inside the. 8. To reduce tempdb contention, divide the database file into multiple files of equal size. Starting with v1. December 8, 2009. SQL Server. It automates the time-consuming process of finding fragmented indexes based on policies for the targeted databases. However, each records will be updated at least 3 times afterwards. Or with other fill factors I tested: - Setting a Fill factor of 80 on the clustered index (Fragmentation > 98%. avg_fragmentation_in_percent. index_type_desc ,IPS. That article was where the old "Best Method" recommendation of Reorg between 5 and 30% and Rebuild at > 30% fragmentation used to live. After running your script in SQL 2005 I still don’t see any index defrag changes not with a 3-rd party monitoring tool or by running this: USE master SELECT * FROM. e. Here are the options that I came up with: Expand the 1st file in the PRIMARY filegroup by ~28GB (7 files x 4GB) Move the data off each of the successive files and mark them for deletion. SQL Defrag Manager is a powerful solution that automates and optimizes your SQL Server database defragmentation. e check fragmentation and take an appropriate action. 1. 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. This means you can grant alter table on every table of interest that already exists. Reports index length stats for indexes who's lengths exceeding parametrized thresholds (defaults to 0 - get all) for total length and seek length. I've been tasked with performing defragmentation on all of the tables. It depends on the degree of fragmentation of Indexes. Monthly – 17% fragmented. Otherwise, nothing special. 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. Chad Boyd. 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. alloc_unit_type_desc FROM sys. object_id) AS schema_name, OBJECT_NAME(ips. He shows how to analyze indexes and, if necessary, how to go about reorganizing or rebuilding indexes. This may affect the concurrency of the server that's running SQL Server. These commands are great, but you really need to collect the information and then. Index fragments occur when any transaction takes place in database table. 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. INDEXDEFRAG = defragments page by page. 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. Rebuild does not drop and recreate the clustered index. dm_db_index_physical_stats in SQL Server 2005 and later. Contig can defragment SQL Server database and log files while the databases are online, but there is some performance cost (whether or not the. For more, read my post: Stop Worrying About Index Fragmentation. Coworker started REBUILD on both tables. Why, when and how to rebuild and reorganize SQL Server indexes. Reorganize index and level of defragmentation. We have a Non-Clustered index on the varbinary field and our index maintenance scripts perform a REORGANIZE on this every 2-3 days. This is great if the . We have tried this but it does not work: Amend registry value. The T-SQL script in this article can be run by SQL Server administrators to reindex and defragment WSUS databases. For the SQL Servers we manage for our. SQL Defrag Manager is a unique solution for defragmenting indexes for SQL Server. Two types of fragmentation can afflict SQL Server indexes and consequently the performance of your databases. Reorganize/Rebuild SQL Server database indexes using ApexSQL Defrag ApexSQL Defrag is a 3rd party tool made specifically to automatically fix index fragmentation in SQL Server databases. This might be due to MAXDOP setting on your server instance. This reversed the defragmentation step and gave them a database with nearly 100% fragmentation. 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. [index_id] = [idx]. DBCC SHRINKDATABASE(WorldOfHurt, 1); And it’ll reorganize the pages in the WorldOfHurt to leave just 1% free space. This index uses column-based data storage and query processing to achieve gains up to 10. (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. ApexSQL Defrag is a powerful application used for scheduled analyzing and defragmenting of SQL Server database indexes. In the CREATE INDEX to can tell SQL Server to sort in TempDB vs. The Ultimate Index Width Stats Reporter. It makes your indexes larger and many operations slower by making the SQL Server access more pages than necessary. This to me would be a sign that constant rebuilds of that index actually aren't a good help. In order to solve this problem, it is necessary to start with analyzing the index and evaluating the degree of its fragmentation. Odds are, you’re not actually making things better – you’re making them worse! I explain why in this video: Why Index Fragmentation Doesn't Matter in SQL Server. Index automation Job script. 8. You’d have to set this up on your own. index_id as [SI. SELECT ips. 0). 1 Answer. The DBCC SHOWCONTIG statement traverses the page chain at the leaf level of the specified index when index_id is specified. Right click the index, click Properties, then click Fragmentation to see the fragmentation and page fullness percentages. This can be checked using:. Here I use 4 conditions : 1. 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 - defragmenting an index on a compressed table. Create a execute sql task and schedule it through sql agent . 1. Your best assistant here is our SQL Defrag feature, seamlessly integrated with dbForge Studio for SQL Server . Niko Neugebaeur is the go-to for in-depth columnstore tips, and in this post, he analyzes the online. The DB restore may de-fragment (physically) at the disk level, but there will still be the same internal fragmentation at the page level. On versions prior to SQL Server 2005 you can defrag standard indexes using the DBCC INDEXDEFRAG command:For a linked list (a B-tree index), than can cause SQL Server to "jump back and forth" in the database file when it read lots of pages (a scan or partial scan). [index_id] The name of the index. On the third pass, SQL Server swaps the next physical page (4) with the next logical page (3). 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. The syntax is: "java. 16. It is designed specifically to overcome the compromises DBAs have to make regarding the important task of index fragmentation maintenance. The sys. Index Recommendations and ORDER BY’s. For more, read my post: Stop Worrying About Index Fragmentation. The DBCC Defrags will put the data in better order. 7, on any database context you choose to create the usp_AdaptiveIndexDefrag and its supporting objects, open the attached script, and. You can verify that by doing an "edit" on the page and. Location : HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows Search. 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. August 1, 2013 at 3:52 pm. However, the index maintenance defaults. When I ran the query again, this was the result: Fragmentation over 70% for 12 indexes, over 30% for 15 indexes. 1. If you are seeing this behavior, then its better to use ( MAXDOP 1) ( serial index rebuild) at query level when. In order to begin, proceed to Manage Index. Rebuild drops and recreates the index. February 6, 2019. #1637994. [index_id] , idx. 0 supports the SQL statements and syntax described in this chapter. You're allowed to define online/offline rebuilds, reorganizations, stats updates, partition level operations, etc. SQL Defrag Manager offers a totally new way to identify, optimize, manage and automate SQL Server defragmentation. You also can create a linked server to SQLAZURE and create a sql agent job. You can use SQL Server Management Studio (SSMS) or T-SQL to get started managing index fragmentation. DBCC INDEXDEFRAG (AdventureWorks2022, 'Production. how to find out defragment index pages in sql server 2008 using script? 0. Before SQL Server 2005 (9. After the defragmentation, the following is the fragmentation report of our db. The Ultimate Index Width Stats Reporter. If running into a particular performance issue, Microsoft PSS will sometimes recommend a manual full reindex. 31, the table and index data collection is enabled by default during installation. MadhuQ1: There is no good way to check for all forms of fragmentation in either the data or the secondary indexes. Dropping the clustered index turns the table into a. Trigger defragmentation of database indexes by fragmentation percentage and scan density. You can use SQL Server Management Studio (SSMS) or T-SQL to get started managing index fragmentation. Niko Neugebaeur is the go-to for in-depth columnstore tips, and in this post, he analyzes the. Terrific work Michelle! The script rivals Ola Hallengren's broader maintenance scripts that I use often. In this case Reorganize option is selected:Databases with no index defragmentation were an average of 5% fragmented. Jul 27, 2021, 8:03 PM. DM_DB_INDEX_PHYSICAL_STATS DMV displays fragmentation information for the data and indexes of the specified object. Daily – 6% fragmented. Reports index length stats for indexes who's lengths exceeding parametrized thresholds (defaults to 0 - get all) for total length and seek length. In order to solve this problem, it is necessary to start with analyzing the index and evaluating the degree of its fragmentation. Link: Microsoft SQL. 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. Lines 469-480 set up the dynamic SQL to rebuild the specified index for. Otherwise, nothing special. [index_id] , idx. index : will run only index. You’d have to set this up on your own. name AS IndexName, qs. database_id = 6. 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. While you are at it, by all means, use. Image is no longer available. The default is 5 percent. Instead of our phone book having 1,000 pages that are 100% full, we might have 1100 pages that are only 90% full. {"payload":{"allShortcutsEnabled":false,"fileTree":{"AdaptiveIndexDefrag":{"items":[{"name":"CHANGELOG. With both SQL 2000 and SQL 2005 and later versions you can get the fragmentation information by using the DBCC SHOWCONTIG command. Monthly – 17% fragmented. This common maintenance task actually causes fragmentation, which is especially terrible if you’re doing both this and defragmenting your indexes. If you have fragmentation, you need to REBUILD or REORGANIZE. This should be part of our SQL Server Maintenance jobs. Microsoft best practice says that you should generally not do a rebuild operation unless fragmentation is over 30%. 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. Review CREATE INDEX. Perform logical consistency checks on indexes. SQL Server Index Maintenance-Conditional Rebuilds. Extra disk space required during SQL Server online index rebuilds. Index defrag can run online without locking the table, and "can be resumed". In addition,. Defaults to 480m (8h). Defragmenting an Index. 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. This should be part of our SQL Server Maintenance jobs. dm_db_index_physical_stats(DB_ID(), default, default, default, 'SAMPLED') AS. It automates the time-consuming process of finding fragmented indexes based on policies for the targeted databases.