Check indexes from the index grid and click desired defragment operation from the ribbon. DO: Be aware of features that can cause page splits. Let it autogrow with at least 200 MB at the time. Fortunately, like Windows 7, Server 2008 can on a schedule defrag. SQL Server Index Defragmentation. The database is using the SIMPLE recovery model. The SAMPLED mode returns statistics based on a 1 percent sample of all the pages in the index or heap. We do create indexes to improve the search performance of our queries. Paul Randal. Contig can defragment SQL Server database and log files while the databases are online, but there is some performance cost (whether or not the performance hit will be a problem depends on the particular system). [name] , ips. Index Rebuild operation first drops and then recreates the index. You’d have to set this up on your own. He shows how to analyze indexes and, if necessary, how to go about reorganizing or rebuilding indexes. In the CREATE INDEX to can tell SQL Server to sort in TempDB vs. There are several options that allow you to specify the level of. DBCC SHRINKFILE does what the name implies. Maintaining indexes is an ongoing and very responsible job assignment. Index still fragmented right after rebuilding it (SQL Server) 1. Over time these indexes become fragmented so that ordered data retrieval becomes less efficient. Microsoft recommends Index Rebuild operation to defrag indexes if the fragmentation level of your index is greater. No, there is no auto-magical defragging of indexes. Using SQL Server Managed Lock Priority for Online Index Rebuilds. 0 databases. [name] as 'Schema', dbtables. type_desc AS index_type, ips. Expand the Indexes. Review Using SQL Server DMVs to Identify Missing Indexes tip. However, over time and especially when heavy. 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. [avg_fragmentation_in_percent] FROM sys. 1. With the SQL performance analyzer in DPA, DBAs can check SQL index fragmentation on the server and get pinpointed advice about wait times, SQL statements, and the actual workload—across the past five seconds or five years—they. 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. The Server is running SQL Server 2017 (RTM-GDR) (KB4505224) - 14. We also checked the indexes of the tables that are accessed sequentially on process overview. Remarks. Right click the index, click Properties, then click Fragmentation to see the fragmentation and page fullness percentages. 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. Database size was ~66GB. 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. That's why as a rule of thumb, for fragmentation greater than about 30%. The only way to get rid of this fragmentation is to rebuild both the non-clustered index and the clustered index. [DEFRAG ]; Closes the database files, rewrites the script file, deletes the log file and opens the database. The next thing to know about index recommendations has to do with the keys in the index. 1. All they do is waste space and resources. To check for index fragmentation using SSMS, open Object Explorer and navigate to the index you want to check. Fragmentation. Defaults to 480m (8h). The default is 5 percent. To defragment indexes, SQL Server 2000 provides several statements. Rebuild does not drop and recreate the clustered index. 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. Msg 50000, Level 16, State 1, Procedure IndexOptimize, Line 1009 The documentation is available at. While you are at it, by all means, use FILLFACTOR, to reduce future fragmentation. This point here is extremely important. After the defragmentation, the following is the fragmentation report of our db. In this type of index, a pointer to the actual table data is stored in the leaf node. To create a new job, right click on SQL Server Agent, select New and then Job. And if it is a clustered index, the entire table is copied. SELECT OBJECT_NAME (fq. Thus it is not advised to run index rebuild during operational hours only during maintenance windows. dm_db_index_physical_stats ) function accepts parameters such as the database, database table, and index for which you want to find fragmentation. Type : DWORD. Image is no longer available. If an index contains less than 100 pages, I will perform no maintenance. Make complete backup to a different partition. Reorganizing an index only deals with the fragmentation that exists, and the more fragmentation there is, the longer a reorganize will take. Lock durations are short and will cause minimal blocking of queries. Let’s say N […] How Fragmentation Hurts SQL Server Performance. For those unfamiliar with this object, it defragments indexes in SQL Server 2005 using the ALTER INDEX command. The defragmentation schedule must be created manually in all versions. Go to DBACOCKPIT –> Performance –> SQL Statements. Delete the other 7 files. A SQL Server DBA myth a day: (29/30) fixing heap fragmentation. Stack Overflow. Based on the query analysis output, rebuilding or reorganization of indexes must be done. SELECT CASE WHEN indexstats. You have the options in the Plan for shrinking the database and defragging existing indexes. I have a question about index maintenance. Quickly find the worst impacting indexes in a color-coded dashboard. When I ran the query again, this was the result: Fragmentation over 70% for 12 indexes, over 30% for 15 indexes. Lines 469-480 set up the dynamic SQL to rebuild the specified index for. Store the data in a temporary table, truncate the old data, and re-insert the data back. Identify this using DBCC SHOWCONTIG (in SQL 2000) or sys. 0. These commands are great, but you really need to collect the information and then analyze the data to. Locking. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) Columnstore indexes are the standard for storing and querying large data warehousing fact tables. I'd consider doing a LOB_COMPACTION less frequently but both options comes down to your maintenance windows duration pretty much. txt","contentType. With both SQL 2000 and SQL 2005 and later versions you can get the fragmentation information by using the DBCC SHOWCONTIG command. This is called fragmentation. Yup. Only files marked by the system as "not moveable" can't be defragmented. Note that the time limit is checked BEFORE an index defrag begins, thus a long index defrag can exceed the time limit. From that you can easily run a defrag on each index as follows DBCC INDEXDEFRAG (8, 1113627606, 5) DBCC INDEXDEFRAG (8, 1113627606, 2). There are two ways of doing that: (i) by using the ‘ DBCC SHOWCONTIG ‘ command, and (ii) by using the ‘ sys. ApexSQL Defrag is a powerful application used for scheduled analyzing and defragmenting of SQL Server database indexes. Reference: Pinal Dave (I had some indexes on a table with around 700m rows that I couldn't defragment below around 30%. Less bad with modern disk subsystems (which is why we focus less on defrag nowadays). Also even though SQL allocates in 8K blocks having to move the disk head all over the place leads to much slower access times. Double Click on one of the SQL Statements. dm_db_index_physical_stats in SQL Server 2005 and later. December 8, 2009. It’s advisable to remove those often. Enable Fragmentation Manager through the right-click context menu of any instance or by opening the Indexes tab of SQL Sentry and selecting Enable Now. The best SQL Defrag Manager alternative is dbForge Index Manager for SQL Server. As administrators will know, identification of fragmentation and of the same are crucial elements in database . If an index is between 10% and 30% fragmented, I will REORGANIZE the index and UPDATE the statistics. Here is a. The best recommendation I have is to create your own procedure which loops through the tables of the database and runs DBCC INDEXDEFRAG. Reference: Pinal Dave (had some indexes on a table with around 700m rows that I couldn't defragment below around 30%. Contact the manufacturer of the defragmentation tool to learn how files are locked and how this. Our Production instance is running SQL Server 2014. 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. In the heap tables, the absence of the clustered index means that the data. Reorganize indexes in a table using Transact-SQL. the filegroup of the index. Review CREATE INDEX. a. This is called fragmentation. [index_id] , idx. 31, the table and index data collection is enabled by default during installation. e check fragmentation and take an appropriate action. Index names must follow the rules of. You need free space in the db of table_size x 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. 0. Select Steps, and then select New to add an execution step. Its wide range of features allows users to create and manage custom policies, monitor index fragmentation on multiple servers as well as to create index fragmentation reports. 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. In enterpise edition of SQL server you can also rebuild index online (which is better than index defrag for performance) Yes. This can be checked using:. 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). Index reorganization is a process where the SQL Server goes through existing index, and cleans it up. In 2016, auto update of stats have been enabled for most databases. fulltext_index_fragments catalog view can be used to query the number of fragments comprising a full-text index. It's a. For database optimization, we recommend using an index and statistics maintenance script. dm_db_index_physical_stats in SQL Server 2005 and later. These pages can get empty space on them and become out of order over time as well. Defragment on-demand and via schedules. 2 (X64). In short, defragmentation is essential for performance improvement of SQL. This generates a fragmentation of this clustered index of more than 99% (with default Fill factor). 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. Let it autogrow with at least 200 MB at the time. Our DBs are 24/7, so we need a minimally-invasive strategy. The automation built into SQL Defrag Manager enables you to implement a "setThis is one of the optimizations SQL Server does when. Hi @Boopathi Subramaniam , Thanks for posting in Microsoft Q&A forum. Internal fragmentation means there is free space inside the data pages rather than having them fully packed with row data. Link: Microsoft SQL. Because the smallest unit of data to be cached is an 8 kB data page, not a single row, it also. Missed Connection: Employer Seeking Employee. 0). Defragmentation utilities may lock sections of the file, preventing SQL Server from completing a read or write operation. Defragment Indexes. This article shows an example of how to manually perform defragmentation on an index using SQL Management Studio. dm_db_index_physical_stats to get information about your index fragmentation (see the avg_fragmentation_in_percent column). It checks the SQL Server licences, if Enterprise it will rebuild the index online else it. Heaps will show up in your contig reports, and you can see the fragmentation percentage along with the other index frag stats. Automatic index and statistics management. Here I use 4 conditions : 1. It's not free, so if you're. (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. Select * from sys. indexes. @dbScope specifies a database name to defrag. After inserting 2000 rows the fragmentation is at around 4%. The database will be shrunk leaving it. In this Article, I am sharing T-SQL Script to find the Index Fragmentation report for SQL Server User database. 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. There are two main ways to defragment a Heap Table: Create a Clustered Index and then drop it. Expand the table on which you want to reorganize an index. Columnstore Online Index Rebuilds – Columnstore indexes need more attention to maintenance. 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. Weekly – 3% fragmented. 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. Index fragmentation is when the pages are not contiguous, and thus the disk access requires more operations. The defragmentation of a heavily fragmented index can generate more log than a fully logged index creation. For an index, only the parent-level pages of the B-tree (that is, the pages above the leaf level) are scanned. Identify and remove index fragmentation – this is obviously what we have been talking until now and the biggest part of the SQL index maintenance. Two additional methods to defragment physical database and log files are backup/restore or detach-move-attach, and both require down-time. Math. The issue was not enough contiguous free space inside the database to arrange the index consecutively. This can be checked using:. Daily – 6% fragmented. physical defragmentation by orders of magnitude. Share This: As the data in the database tables of Microsoft SQL Server changes, their indexes change. 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. Expand the Indexes. You need free space in the db of table_size x 1. Having said that, fragmented data can produce unnecessary reads thereby reducing. These commands are great, but you really need to collect the information and then. The general consensus is if fragmentation is: Less than 10% – there is no need to do anything to the index. Example: Name: Indexrebuild_job; Description: RDS for SQL server agent job for index rebuild. ALTER INDEX ALL ON Production. Between 10% and 30% – defragging the index with the REORGANIZE option is recommended. Often, this is not enough to perform index. Last week I decided to play with SQLFool's Automated Index Defrag Script and found it very usable and worthwhile. 1. Missed Connection: Employer Seeking Employee. Burt King. The following example defragments all partitions of the PK_Product_ProductID index in the Production. Note that PostgreSQL uses the term "clustered index" to use something vaguely similar and yet very different to SQL Server. Trigger defragmentation of database indexes by fragmentation percentage and scan density. Ignore: Fragmentation levels of 10 percent or less should not pose a performance problem, so you don’t need to do anything. 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. Index Defragmentation is one of the key processes to significantly improve performance of any database. Appreciate your answers Joseph. Now, all you have to do is download the T-SQL script, execute it on your Azure SQL DB and execute the maintenance procedure. Like SQL Server Management Studio, you run Tuning Advisor from a client computer that connects to your Amazon. In it, enter the Job name, owner, optionally Category. For an example, see the SQL Server index and statistics. On the right panel, right-click SQL Server Agent. When i try to defrag them using ALTER INDEX. You can't do online index rebuilds. The following query ran for ten minutes on version 2008. This tool provides index analysis to manage index defragmentation, including rebuild and reorganize fragmented indexes . HeapTest ( Id INT not NULL Default (1), Col1 char (5000) Not null Default ('Heaps Are Cool') ) SET NOCOUNT ON Insert into dbo. All necessary information is provided in this graphical tool with custom visuals and policies along with various informative reports. Set the lower limit, as a percentage, for medium fragmentation. Particularly if you are in full recovery. 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. If you want to run it on every user database on your server, simply replace DB_ID () with NULL in the call to sys. Share. This schema modification lock blocks all other concurrent access to the table, but it is only held for a very short period of time while the old index is dropped and the statistics updated. On the fourth pass, SQL Server swaps the next physical page (5) with the next logical page (4). This may affect the concurrency of the server that's running SQL Server. To optimize read-only workloads on the readable secondary replicas, you may want to create indexes on the tables in the secondary databases. . In a nutshell, SQL Server’s performance can be most improved by focusing on its internals. SQL index fragmentation reports. 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. Script to Manage SQL Server Rebuilds and Reorganize for Index Fragmentation. Note that a heap index number will be zero. Reorganize index and level of defragmentation. A very fragmented index might take considerably longer to defragment than to rebuild. – Dave Mason. name AS IndexName, qs. Niko Neugebaeur is the go-to for in-depth columnstore tips, and in this post, he analyzes the online. Not so much if the file is spread out all over the disk. It is very common to see big increase in performance after optimizing your SQL indexes. Basically, an index rebuild copies the index to another place. If you have space constraint on the Server then you may need to Shrink the db. Yes, rebuilding indexes will take a toll on your transaction log file. 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. the filegroup of the index. April 29, 2010. But this takes. (SQL Server) How to defragment indexes with LOBs? 1. If you are experiencing slow full-text query performance, you can use sys. Leverage solutions such as Adaptive Index Defrag to automatically manage index defragmentation and statistics updates for one or more databases. Over time, the indexes created for an SQL Server database can become fragmented. Fragmented indexes will primarily slow down ‘search’ performance. This REBUILD option is available in SQL Server 2008 onwards. Lock durations are short and will cause minimal blocking of queries. According to Microsoft guidelines, based upon index fragmentation percentage, we may choose to either REORGANIZE,. This white paper compares two of those statements: DBCC DBREINDEX and DBCC INDEXDEFRAG. In our previous blog post, we got to know, how to find out all fragmented indexes in a database. Make sure to thick the Enabled checkbox. Index fragmentation can cause high CPU usage, which means disk usage, and therefore performance degradation. The Ultimate Index Width Stats Reporter. In order to test this scenario, we could use the other table we created earlier - Product_B. After the index rebuilds, query was way faster when comparing to clean buffer caches. logical fragmentation is just mismatch between Logical ordering of Index keys and physical. Any indexes above 50% in fragmentation percentages that affect more than 4000 rows are bad, and the system performance can significantly benefit from defragmenting the indexes. Rebuild Index using ApexSQL Defrag ApexSQL Defrag Overview. Check the comment header block for its documentation. Failing that (ie Standard Edition etc), look at re-organizing indexes - these will keep them online. If an index contains less than 100 pages, I will perform no maintenance. MyTable. The results for this command are up for comparison against the Alter Index Rebuild. You don't mention what tool you're using to defrag the disk, I supose it's the standard Disk Defragmenter. Use DBCC INDEXDEFRAG to defragment an index. The tempdb is used a lot – place it on separate drive to the Log and MDF files. Fortunately, like Windows 7, Server 2008 can on a schedule defrag. The disks defrag OK, and SQL is not harmed - this is the result that should be expected. It automates the time-consuming process of finding fragmented indexes based on policies for the targeted databases. Indexes were 75% fragmented. SELECT OBJECT_NAME (fq. Yes it will - but only to a certain degree. index_type_desc AS IndexType, qs. It is designed specifically to overcome the compromises DBAs have to make regarding the important task of index fragmentation maintenance. Database size was ~66GB. The method (not a trick), therefore, is to Create Clustered Index only for the purpose of de-fragmenting the Heap, and drop it afterward. DBCC INDEXDEFRAG (AdventureWorks2022, 'Production. 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. name AS index_name, i. Open Object Explorer & expand the database containing the table you wish to reorganize. 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. OBJECT_ID) + '] REBUILD; ' END, 'GO' FROM sys. The first step in fixing an index fragmentation performance problem is to determine how big the problem is. ) Then rerun the above free-space query again to see how the shrink worked: Free space after. According to. It can be turned on by using the in-app wizard in any version. I'd rebuild stats every night at least. SQL Server A family of Microsoft relational database management and analysis systems for e-commerce, line-of-business, and data warehousing solutions. LesterDove, the problem may be your . In Update Statistics they mention one of the solutions:. This common maintenance task actually causes fragmentation, which is especially terrible if you’re doing both this and defragmenting your indexes. Sc (Comp Sci) SQL In The Wild : Discussions on DB performance with occasional diversions into recoverability We walk in the dark places no others. You can use sys. It's. Coworker started REBUILD on both tables. This job needs to be scheduled and ran on a weekly basis due to. The sys. This point here is extremely important. dm_db_index_physical_stats also provides fragmentation information for each partition. 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. Maintenance. That article is in-depth and difficult to summarise in this reply, but it comes down to creating an asynchronous. Azure Automation: Automate Azure SQL Database indexes and statistics maintenance. 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. SQL Server 2005 and later provides a dynamic management function (DMF) to determine index fragmentation level. The best recommendation I have is to create your own procedure which loops through the tables of the database and runs DBCC INDEXDEFRAG. Paul pointed out a couple of other points. 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. Coworker started REBUILD on both tables. fulltext_index_fragments to query for the number of queryable fragments (status = 4 or 6) in the full-text index, as follows: SELECT table_id,. Another possibly is that the index is being rebuilt and then re-fragmenting again. In the Indexes folder, expand the file. On the second pass, SQL Server swaps the next physical page (7) with the next logical page (2). If you don't want to grant so granular. A starting point could be looking at the queries being executed on your server. A proper query analysis plan has to be built and followed. These scripts are widely tested in the community and are much flexible so that you. Create/restore new database from the recently created backup. Q1: None. 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 decide Database Index Defragmentation Tool for SQL Server. SQL Server 2000 introduces a new DBCC INDEXDEFRAG statement to defragment clustered and nonclustered indexes on tables and views. In this case Reorganize option is selected: Databases with no index defragmentation were an average of 5% fragmented. Particularly if you are in full recovery. Chad Boyd. 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. A new window. I would highly recommend using a tool specific to sql server to defragment the drive(s) on which the files sit. While index reorganization is a pure cleanup. Speaking for SQL Server, I tend to choose a index size and index fragmentation level at which point I begin performing index maintenance. Monthly – 17% fragmented. To improve the clustering of pages, rebuild the index. 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. Indexes play a critical role in SQL Server query performance. Although possibly related with a very small database as suggested in other response, the problem is more likely tied to the FILLFACTOR. Defaults to 480m (8h). 0 supports the SQL statements and syntax described in this chapter. Lines 436-443 setup the dynamic SQL to rebuild the index with the specified fill factor if the table is not partitioned. Modified 13 years ago. 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. 0. On the right panel, right-click SQL Server Agent. Often, this is not enough to. Disable the indexes on the target table (at least the non-clustered indexes, or NCIs) Insert the new data. SELECT OBJECT_SCHEMA_NAME(ips. It makes your indexes larger and many operations slower by making the SQL Server access more pages than necessary. We would like to show you a description here but the site won’t allow us. I want to defrag tables in sql server, I used this code to know the fragmented indexes: sELECT dbschemas. 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. If you have fragmentation, you need to REBUILD or REORGANIZE. Columnstore Online Index Rebuilds – Columnstore indexes need more attention to maintenance. Otherwise, nothing special. This removes fragmentation, reclaims disk space by compacting the pages based on the specified or existing fill factor setting. This to me would be a sign that constant rebuilds of that index actually aren't a good help. Watch this video by List the Indexes. One other item. SQL Index Fragmentation and Maintenance. From the SQL Server Index Properties page, browse the Fragmentation page, and you will see the index fragmentation percentage and how much the SQL Server index pages are full. SQL Server. 1. Index names must be unique within a table or view but don't have to be unique within a database. This must. How Defragmentation Improves Performance. Now SQL have 4 threads to the database and not one. This tool provides index analysis to manage index defragmentation, including rebuild and reorganize fragmented indexes . 1 Answer. Index Recommendations and ORDER BY’s. 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. 2. I have been trying to defrag indexes in SQL Server 2005 and nothing seems to work. Some things I've tried: Rebuilding the indexes: ALTER INDEX ALL ON dbo. The method (not a trick), therefore, is to Create Clustered Index only for the purpose of de-fragmenting the Heap, and drop it afterward. Defragment on-demand and via schedules. Sorted by: 2. Note: In versions 2020. Click OK. SP_BlitzCache can help with finding your worst performing queries. Using SQL Server Managed Lock Priority for Online Index Rebuilds. It does exactly that if ON. The T-SQL script in this article can be run by SQL Server administrators to reindex and defragment WSUS databases. DO: Implement appropriate index fill factors. 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. SQL Server 2008 index fragmentation problem. 2 Answers. 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. 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. 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. Aaron Bertrand April 13th, 2009 SQL Server 3.