Failing that (ie Standard Edition etc), look at re-organizing indexes - these will keep them online. This mechanism allows defragmenting required indexes on a regular basis since index fragmentation takes place constantly in the 24/7 system. List the Indexes. 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%. Now we will see how to defrag indexes. The execute sql task should contain the index rebuild code along with stats rebuild . In SQL 2005, you can query DMV sys. Monthly – 17% fragmented. Databases with no index defragmentation were an average of 5% fragmented. So we defragment and build indexes twice a week. [index_id] = [idx]. 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 default is 5 percent. Logical consistency checking on indexes varies. @tblName specifies if you only want to defrag indexes for a. To test this you can comment out (or remove completely) the line second from the bottom with two minus signs (--). No, there is no auto-magical defragging of indexes. Our Production instance is running SQL Server 2014. But think it through. This script does basic maintenance tasks on SUSDB: Identifies indexes that are fragmented, and defragments them. A. {"payload":{"allShortcutsEnabled":false,"fileTree":{"AdaptiveIndexDefrag":{"items":[{"name":"CHANGELOG. Collection of solution center articles on SQL index defragmentation topic. It is designed specifically to overcome the compromises DBAs have to make regarding the important task of index fragmentation maintenance. Here's one from MSDN:--This example shows a simple way to defragment all indexes in a database that is fragmented above a declared threshold. Basically, an index rebuild copies the index to another place. Time time went down, physical reads went way down and read-ahead reads went way up. We need to drag and drop tasks from the Toolbox (to open the toolbox use Ctrl + Alt + X) into the gray workspace area on the bottom as shown in the below screenshot. 4. While you are at it, by all means, use FILLFACTOR, to reduce future fragmentation. It can be done with online option in enterprise edition. Lock durations are short and will cause minimal blocking of queries. 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. */Effective database performance tuning often relies on having precise database insights to determine actual root causes. The method (not a trick), therefore, is to Create Clustered Index only for the purpose of de-fragmenting the Heap, and drop it afterward. INDEX DEFRAG on SQL SERVER 2005. As data is added to the table, the free space fills because the fill factor isn't maintained. Index Defragmentation is one of the key processes to significantly improve performance of any database. dm_db_index_physical_stats ) function accepts parameters such as the database, database table, and index for which you want to find fragmentation. Bad internal fragmentation (having lots of free space on the pages) means the index is bigger than it needs to be. He makes the point that, by analyzing indexes effectively, you can save a lot of unnecessary rebuilding of indexes. * 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. Using SQL Server Managed Lock Priority for Online Index Rebuilds. Expand the Indexes. Consequently, the fragmentation adversely affects the performance of SQL Server. Delete the database with fragmented MDF file. The general consensus is if fragmentation is: Less than 10% – there is no need to do anything to the index. SQL - defragmenting an index on a compressed table. On smaller databases it ran quite quickly and with the correct and desired effects. You can also change this threshold via parameters. physical defragmentation by orders of magnitude. 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. 1. It can be turned on by using the in-app wizard in any version. Internal fragmentation means there is free space inside the data pages rather than having them fully packed with row data. sqrt"(2. It automates the time-consuming process of finding fragmented indexes based on policies for the targeted databases. The defragmentation schedule must be created manually in all versions. Instead of our phone book having 1,000 pages that are 100% full, we might have 1100 pages that are only 90% full. (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. mdf file size: your disk have to have space to re-allocate a 35-gig file, in order to defragment it. Yes it will - but only to a certain degree. We have a SQL 2016 database that has a 1. In order to begin, proceed to Manage Index. tbl_AdaptiveIndexDefrag_IxDisableStatus, where indexes that were disabled are logged, so that an interruption in the defrag cycle can account for these indexes has being disabled by the defrag cycle itself and not the user. Delete the other 7 files. When i try to defrag them using ALTER INDEX. [index_id] , idx. 1. The reason why too many page splits can decrease the performance of SQL Server is because of the large number of I/O operations. T-SQL script. PS: The above script is for row-store indexes. 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. In addition,. MS SQL Server always updates index statistics whenever an Insertion, Updating, or Deletion activity is performed on the . 2. SQL Server does not maintain when an Index was last rebuild, instead it keeps information when stats were last updated. This job needs to be scheduled and ran on a weekly basis due to. go. An index rebuild will always build a new index, even if there’s no 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. Script to Manage SQL Server Rebuilds and Reorganize for Index Fragmentation. This causes a lot of free space or, as you call it, fragmentation. That article is in-depth and difficult to summarise in this reply, but it comes down to creating an asynchronous. It will do: Nothing if the fragmentation level is below 5%;. MadhuQ1: There is no good way to check for all forms of fragmentation in either the data or the secondary indexes. The SAMPLED mode returns statistics based on a 1 percent sample of all the pages in the index or heap. This is because the doc set was reorganized for the SQL Server 2012 release, and not all topics/categories made it. 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. Over time, the indexes created for an SQL Server database can become fragmented. Lines 436-443 setup the dynamic SQL to rebuild the index with the specified fill factor if the table is not partitioned. 1. Create a clustered index and move it away from the heap. Apart from disk space you should not be too worried. NAME + '] ON [' + Object_name(ind. Defragmentation improves disk space and. 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. Niko Neugebaeur is the go-to for in-depth columnstore tips, and in this post, he analyzes the. and a weekly rebuilding of indexes. This generates a fragmentation of this clustered index of more than 99% (with default Fill factor). You don't mention what tool you're using to defrag the disk, I supose it's the standard Disk Defragmenter. We also checked the indexes of the tables that are accessed sequentially on process overview. dm_db_index_physical_stats (DB_ID(), NULL, NULL,. ALTER INDEX ALL ON Production. In older versions of SQL Sentry, this feature is disabled by default. Paul Randal. 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. Select Steps, and then select New to add an execution step. Heaps will show up in your contig reports, and you can see the fragmentation percentage along with the other index frag stats. fulltext_index_fragments catalog view can be used to query the number of fragments comprising a full-text index. Defragment Indexes. A proper query analysis plan has to be built and followed. "SQL Fool") has an automated index. It is probably better to use the first parameter of sys. 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. dm_ db_ index_ physical_ stats (in 2005+). The link points to SQL Server 2014 docs, but the syntax should work on 2005 and 2008 as well. So now, we have identified all the fragmented indexes, how to defrag them? That is our next blog 😊. 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. 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. The method (not a trick), therefore, is to Create Clustered Index only for the purpose of de-fragmenting the Heap, and drop it afterward. DBREINDEX = REBUILD option "Rebuilding Indexes". The wise use of indexes is a proven method of improving database performance. That article was where the old "Best Method" recommendation of Reorg between 5 and 30% and Rebuild at > 30% fragmentation used to live. Extra disk space required during SQL Server online index rebuilds. If you want to run it on every user database on your server, simply replace DB_ID () with NULL in the call to sys. Review ALTER INDEX command on MSDN. 0 supports the SQL statements and syntax described in this chapter. Sorted by: 2. Watch this video by List the Indexes. dm_db_index_physical_stats in SQL Server 2005 and later. 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. Note: In versions 2020. One of the biggest performance hits that you will see on your databases, next to not having indexes, is indexes that are very fragmented. Maintaining indexes is an ongoing and very responsible job assignment. Index Defragmentation is one of the key processes to significantly improve performance of any database. Each option had its pros and cons, and you need to know which option works best for your environment. To correct index fragmentation, you can reorganize an index or rebuild an. Q1: None. 0. In addition, you can use the dynamic management view sys. Detach the database. We have tried this but it does not work: Amend registry value. For more information, see sys. This setting is known as the fill factor. dm_os_performance_counters where counter_name = 'page splits/sec'. When I ran the query again, this was the result: Fragmentation over 70% for 12 indexes, over 30% for 15 indexes. For an index, only the parent-level pages of the B-tree (that is, the pages above the leaf level) are scanned. When we were listing the fragmanted indexes our scope was on the indexes that are used in expensive SQL Statements. Coworker started REBUILD on both tables. Now understand that logical fragmentation is not introduction of free space or some kind of space between rows present in index. type_desc AS index_type, ips. You can't do online index rebuilds. First of all you need to find the fragmentation percentage for the indexes in a database or table. SQL - defragmenting an index on a compressed table. 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. Index fragmentation is when the pages are not contiguous, and thus the disk access requires more operations. Results still shows high fragmentation, even the application is only used for 2 to 3 days after defragmentation. Hi @Boopathi Subramaniam , Thanks for posting in Microsoft Q&A forum. In the SQL Server index defrag Job Properties window, browse to the Notifications tab and check the box beside the Email to send email notification using the created Database Mail when the job failed or completed successfully to the operator, based on your requirements, then click OK to apply the change on the job, as below:. REBUILD WITH (ONLINE=ON) some of them still remain fragmented. 1. Reorganize: Reorganize indexes with between 11-30 percent fragmentation. As people have mentioned here, your indexes do not automatically rebuild. Index reorganization is a process where the SQL Server goes through existing index, and cleans it up. About; Products. It creates a thread that runs periodically to detect when the database has more than 25% free disk space allocated to it. Thanks for the info on Showcontig and Index Defragmentation. avg_fragmentation_in_percent. Yes, rebuilding indexes will take a toll on your transaction log file. NAME + '] ON [' + Object_name(ind. HSQLDB version 1. index_id. One other item. It was noticed that the data has high fragmentation. Remarks. Then, choose New, Job to create a SQL agent job. If avg_fragmentation_in_percent value is > 5% and < = 30% then you should Reorganize Index. It's. In the Rebuild Indexes dialog box, verify that the correct index is in the Indexes to be rebuilt grid and click OK. The following query ran for ten minutes on version 2008. 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. Identify this using DBCC SHOWCONTIG (in SQL 2000) or sys. Basically, do the minimum commensurate with your fragmentation levels. 25. index_type_desc ,IPS. Otherwise you could just reindex the lot, but you'll. dm_db_index_physical_stats in SQL Server 2005 and later. (SQL Server) How to defragment indexes with LOBs? 1. (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. In this type of index, a pointer to the actual table data is stored in the leaf node. It creates a thread that runs periodically to detect when the database has more than 25% free disk space allocated to it. ALTER DATABASE [Inter3112] SET OFFLINE GO. I would run it every night, personally, as a general rule. There needs to be an automated Index defragmentation job that will either reorganize or rebuild the indexes based on the fragmentation level for a specific table in a specific database. Msg 50000, Level 16, State 1, Procedure IndexOptimize, Line 1009 The documentation is available at. /*Perform a 'USE <database name>' to select the database in which to run the script. An index rebuild will always build a new index, even if there’s no fragmentation. Check indexes from the index grid and click desired defragment operation from the ribbon. 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. You can specify a location where you'd like to store the results of the stats check off indexes. Those rebuilds have been causing some locking pressure on one of our apps and I am looking at the possibility of scaling the rebuilds. Indexes play a critical role in SQL Server query performance. 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). 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. In order to test this scenario, we could use the other table we created earlier - Product_B. Go to DBACOCKPIT –> Performance –> SQL Statements. SQL Server index. A SQL Server DBA myth a day: (29/30) fixing heap fragmentation. Speaking for SQL Server, I tend to choose a index size and index fragmentation level at which point I begin performing index maintenance. 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. dm_db_index_physical_stats(DB_ID(N'XXXMYDATABASEXXX'),. Reorganize or rebuild an index SQL Server Management Studio. Expand the Tables folder. [avg_fragmentation_in_percent] FROM sys. e. Note that the time limit is checked BEFORE an index defrag begins, thus a long index defrag can exceed the time limit. Weekly – 3% fragmented. SQL DEFRAG MANAGER. SP_BlitzCache can help with finding your worst performing queries. Indexes were 75% fragmented. Try to use another defrag tool that let you defrag the free space (I use Defraggler from Piriform. FragmentationLevel1. Over time, the indexes created for an SQL Server database can become fragmented. Your best assistant here is our SQL Defrag feature, seamlessly integrated with dbForge Studio for SQL Server . 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. indexes AS [idx] ON [ips]. 7, on any database context you choose to create the usp_AdaptiveIndexDefrag and its supporting objects, open the attached script, and. The best recommendation I have is to create your own procedure which loops through the tables of the database and runs DBCC INDEXDEFRAG. 59. This mechanism allows defragmenting required indexes on a regular basis since index fragmentation takes place constantly in the 24/7 system. However, the index maintenance defaults. Go to DBACOCKPIT –> Performance –> SQL Statements. Any fragmented indexes with over 15% fragmentation will appear here. The method (not a trick), therefore, is to Create Clustered Index only for the purpose of de-fragmenting the Heap, and drop it afterward. Although possibly related with a very small database as suggested in other response, the problem is more likely tied to the FILLFACTOR. 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. 9bn row table which has a varbinary (255) column which we use to store the HashBytes of an nvarchar (2000) field in the same table. It reorgs indexes when fragmentation is below 30% else it rebuild the index. Check the comment header block for its documentation. index_type_desc AS IndexType, qs. Your could find your indexes are 95% plus fragmented, affecting query performance badly. [avg_fragmentation_in_percent] FROM sys. lang. For those unfamiliar with this object, it defragments indexes in SQL Server 2005 using the ALTER INDEX command. How Defragmentation Improves Performance. Maintenance. We have a database with 2 tables, one with hundreds of millions of rows (row size<1KB), another 14 million rows. go. One of the reasons for that is fragmentation. You can verify that by doing an "edit" on the page and. To check for index fragmentation using SSMS, open Object Explorer and navigate to the index you want to check. A non-clustered index is the other main type of index used in SQL Server. Product REBUILD WITH (FILLFACTOR = 80, SORT_IN_TEMPDB = ON, STATISTICS_NORECOMPUTE = ON);. 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. The following example defragments all partitions of the PK_Product_ProductID index in the Production. The name of the index. 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. Try this code, This will defragment your all indexes based on the fragmentation level. According to Microsoft guidelines, based upon index fragmentation percentage, we may choose to either REORGANIZE, REBUILD indexes or just ignore. In Object Explorer, Expand the database that contains the table on which you want to reorganize an index. 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. 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. In the Indexes folder, expand the file. Let it autogrow with at least 200 MB at the time. Rebuild Index using ApexSQL Defrag ApexSQL Defrag Overview. index_id] ,SI. Having said that, fragmented data can produce unnecessary reads thereby reducing. Paul Randal. Sorted by: 2. Value : 1. All the Clustered indexes were fixed. It depends on the degree of fragmentation of Indexes. It can be done with online option in enterprise edition. SQL Defrag Manager offers a totally new way to identify, optimize, manage and automate SQL Server defragmentation. SQL Sentry Fragmentation Manager helps you make intelligent decisions about index management based on the table and index information collected. 4. This removes fragmentation, reclaims disk space by compacting the pages based on the specified or existing fill factor setting. To make the script at least a bit faster, I narrowed it down from. This may affect the concurrency of the server that's running SQL Server. Fortunately, like Windows 7, Server 2008 can on a schedule defrag. You always has some "white noise", so to speak. Let it autogrow with at least 200 MB at the time. Before SQL Server 2005 (9. This procedure automatically chooses whether to rebuild or reorganize an index according to its fragmentation level, amongst other parameters, and update. 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. You can use Ola's Index maintenance solution or Michelle Ufford's - Index Defrag Script. name AS index_name, i. Columnstore Online Index Rebuilds – Columnstore indexes need more attention to maintenance. In this article. Manually shrinking or growing files using T-SQL commands can also contribute to physical file fragmentation. Michelle Ufford (a. Note that PostgreSQL uses the term "clustered index" to use something vaguely similar and yet very different to SQL Server. The operation only requires an intent-shared (IS) table lock. In this case Reorganize option is selected:Databases with no index defragmentation were an average of 5% fragmented. INDEXDEFRAG = defragments page by page. Fragmentation causes issues where it takes SQL Server more time to traverse the index tree to find the necessary records. 31, the table and index data collection is enabled by default during installation. if the index has: less than 5% logical fragmentation, don’t do anything. Microsoft recommends Index Rebuild operation to defrag indexes if the fragmentation level of your index is greater. 8. The Server is running SQL Server 2017 (RTM-GDR) (KB4505224) - 14. Compression enabled on both. Two additional methods to defragment physical database and log files are backup/restore or detach-move-attach, and both require down-time. Over time these indexes become fragmented so that ordered data retrieval becomes less efficient. 25. Sql server 2005 needs daily index defrag. "Partitioning Clustered Indexes When partitioning a clustered index, the clustering key must contain the partitioning column. Quickly find the worst impacting indexes in a color-coded dashboard. You can use sys. December 16, 2013 10:03 am. Index defrag can run online without locking the table, and "can be resumed". Select Steps, and then select New to add an execution step. In a nutshell, SQL Server’s performance can be most improved by focusing on its internals. In SQL Server, when rebuilding an index which previously had statistics updated with PERSIST_SAMPLE_PERCENT, the persisted sample percent is reset back to default. Share This: As the data in the database tables of Microsoft SQL Server changes, their indexes change. 3. 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. We also checked the indexes of the tables that are accessed sequentially on process overview. 1 Answer. There are two types of fragmentation: Internal Fragmentation and External Fragmentation. Custom SQL Server Index Defrag and Rebuild Procedures. Defragmentation utilities may lock sections of the file, preventing SQL Server from completing a read or write operation. Defragmentation utilities may lock sections of the file, preventing SQL Server from completing a read or write operation. between 5% and 30% logical fragmentation, reorganize it (using DBCC INDEXDEFRAG. 1. SQL Defrag Manager offers a totally new way to identify, optimize, manage and automate SQL Server defragmentation. Contact the manufacturer of the defragmentation tool to learn how files are locked and how this. I have a question about index maintenance. Rob Sheldon tackles the subject of Index Defragmentation in SQL Server 2005 and 2008, using the sys. 1. SQL - defragmenting an index on a compressed table. 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. [index_id] , idx. This reversed the defragmentation step and gave them a database with nearly 100% fragmentation. Reports index length stats for indexes who's lengths exceeding parametrized thresholds (defaults to 0 - get all) for total length and seek length. If you have fragmentation, you need to REBUILD or REORGANIZE. 2. However, over time, indexes will get fragmented, which can severely impact server performance. 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. 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. Run sys. A new window. If not specified, all non-system databases plus msdb and model will be defragmented. Link: Microsoft SQL. The database is using the SIMPLE recovery model. 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. Example: Name: Indexrebuild_job; Description: RDS for SQL server agent job for index rebuild. (When Tempdb is corrupted) as we ALL know that it gets recreated when a SQL Server restart is done, but Tempdb files are not deleted when you restart SQL Server and are also not 0. It is designed. SELECT ips. When the SQL Server service is running, all of the mdf and ldf files are considered open and thus skipped. Modified 13 years ago. 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. There are two main ways to defragment a Heap Table: Create a Clustered Index and then drop it. There are three options to remove fragmentation in heaps: Create a clustered index and drop it once it is completed. For more, read my post: Stop Worrying About Index Fragmentation. physical defragmentation by orders of magnitude. index_type_desc AS IndexType, qs. The best SQL Defrag Manager alternative is dbForge Index Manager for SQL Server. The first method is the Fragmentation page of the SQL Server Index Properties window. Use the ALTER TABLE command to rebuild the Heap. The T-SQL script in this article can be run by SQL Server administrators to reindex and defragment WSUS databases. This can be checked using:. You have the option LOB_COMPACTION. 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. Fortunately, like Windows 7, Server 2008 can on a schedule defrag. Disable the indexes on the target table (at least the non-clustered indexes, or NCIs) Insert the new data. 1. select object_name(IPS. In general no, the restore, at least in "modern" sql servers, is optimized to read and write data quickly. Starting with v1. Like SQL Server Management Studio, you run Tuning Advisor from a client computer that connects to your Amazon. 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. Q2: Generally you do not need to run anything for reindex/update stats. Microsoft best practice says that you should generally not do a rebuild operation unless fragmentation is over 30%. Defaults to 480m (8h). It depends on the degree of fragmentation of Indexes. Check the comment header block for its documentation. Alter Index Rebuild – 217454 ms (218 secs or just under 4 minutes to complete). dm_db_index_physical_stats (Transact-SQL). This is other myth which needs attention. Last week I decided to play with SQLFool's Automated Index Defrag Script and found it very usable and worthwhile. I have created multiple. There is all reason to only rebuild index that are fragmented, and a good maintenance. Expand the Indexes node. In Object Explorer, Expand the database that contains the table on which you want to reorganize an index.