MS-SQL Server - विचार; MS-SQL Server - Import Export, OEM & CREAM Alerts; MS-SQL Server - An English Vision; MS-SQL Server - DEV, TRI & Purchase; MS-SQL Server - Dhai (A Numeric 2. See documentation here. When you create or rebuild an index, by setting the SORT_IN_TEMPDB option to ON you can direct the SQL Server Database Engine to use tempdb to store the intermediate sort results that are used to build the index. Here is a sample script to reorganize any index in SQL Server. Background information can be found in Section 4. The ONLINE option is not saved anywhere, it affects only the current statement that creates or rebuilds the index, even though some of the options are saved in sys. Reorganize or rebuild an index SQL Server Management Studio. But there is an ALTER TABLE… REBUILD option. The link points to SQL Server 2014 docs, but the syntax should work on 2005 and 2008 as well. Applies to: SQL Server. dm_db_index_physical_stats function in SQL Server, and the general recommendations in the Books Online are: If an index has less than 1,000 pages, don’t bother removing fragmentation; If the index has:Shrink the files: r-click on DB, 'Tasks', 'Shrink', 'Files': Then pick a new file size value slightly larger than the 'Minimum is' value given in the dialog. Rebuilding your indexes will generate a lot of unused allocated space in the data file. If You have few indexes in. Rebuild and Reorganize Index using SQL Server Management Studio (SSMS) Find and expand the table in Object Explorer >> Open Indexes >> Right-click on the target index >> Rebuild or Reorganize. Using above query, you could also query the progress of backup,restore,dbcc command and so on. This particular large heap has two lob. You could also refer another query which may be helpful to you. MS advises using Reorganize for 30% fragmentation or less. This makes it more likely that some other session is blocked by your session, and that you may, in turn, become blocked by a lock held by that session. Best Practices. After it completes, we can see the job was successful. Download Microsoft Edge More info about Internet. Quick explanation: An online Rebuild, rebuilds the indexes on the tempDB making it available to the queries while it is being rebuilt. SQL Server offers REBUILD and REORGANIZE options, but they are available only for a full-text catalog (which may contain any number of full-text indexes) in its entirety. 1. On a very busy system, attaining this exclusive lock can sometimes be a problem. 5 hours before I stopped the rebuild. Index fragmentation is pretty meaningless in regards to performance. If rate of Index fragmentation increased then index de-fragmentation is. First, it reduces the size of the columnstore by physically removing deleted rows when 10% or more of the rows in a rowgroup have been deleted. -Search all indexes of a table that have 5% or more of fragmentation and page_count >= 1000. In this article. The Reorganize Index task encapsulates the Transact-SQL ALTER INDEX statement. SQL Server also supports nonclustered columnstore indexes. SQL Server also supports nonclustered columnstore indexes. Assume you have a couple of log files, a data file, and a database named mydb. In this article. Subplan_1' failed. Sc (Comp Sci)My new SQL Server 2005 Enterprise x 64 based maintenance plan's statement: ALTER INDEX [PK_MyTable] ON [dbo]. It doesn’t work on the intermediate pages between the root and the leaf. I advise people to not shrink their databases in blog posts like this where I talk about "right-sizing" and good planning. ALTER DATABASEdb_name SETREAD_COMMITTED_SNAPSHOT ON go Alter index Index_name on table_name. This requires using a CREATE INDEX with DROP_EXISTING statement for all the indexes in the file and can be complex. Sorted by: 238. Requires membership in the sysadmin fixed server role or the db_owner fixed database role. I have maintenance job on SQL Server 2012 Enterprise Edition that runs daily to check index fragmentation and reorganize or rebuild the index based on the percentage of fragmentation. The Reorganize Index task encapsulates the Transact-SQL ALTER INDEX statement. A nonclustered columnstore index functions similarly to a clustered columnstore index in terms of architecture, data management, the deltastore, and other nuances. Reorganize or rebuild an index SQL Server Management Studio. Usually, you should rebuild the index if it has a fragmentation greater than 30% and reorganize it if it has less than 30% fragmentation. If You have few indexes in. SQL DBA,SQL Server MVP(07, 08, 09) A socialist is someone who will give you the shirt off *someone else's* back. Jul 13, 2014 at 5:02. 3rd party scripts can choose the best option. Here is a sample script to reorganize any index in SQL Server. SQL. It looks like the required cpu time SQL Server needs to rebuild the index is neither depending on the fragmentation level nor depending on the Page Count of the underlying index. Additionally, after reorganizing indexes it is reasonable to update the statistics as this operation does not update the statistics like the index rebuild operation. In this article. An index reorganize holds an intent-exclusive table lock throughout the operation, which will only block shared, exclusive, and schema-modification table locks. . A table may only have one columnstore index on it at a time, regardless of whether it is clustered or nonclustered. Service account don't have permissions. This is a powerful feature that you can use to your advantage. Applies to: Oracle Database Cloud Schema Service - Version N/A and later. REBUILD creates a separate index if it's over 128 Extents (8MB) which means there's very little contention, which can sometimes make it faster the REORGANIZE. For example, one of the indexes with a page_count of 967 has a fragmentation percentage of. Sorted by: 2. Select Maximum degree of parallelism, and then enter some value between 1 and 64. Right-click the index for which you want to set the max degree of parallelism and select Properties. It cames in two flavours: online and offline. Now, without closing the command prompt window, we connect to the SQL Server via sqlcmd and run the following command to reset the status of tempdb: exec master. Since you can have multiple columns in a table, here are a few considerations for index key columns. Rebuild can only be done online if you have the enterprise version of SQL Server. This view can be used to query the metadata about these fragments. ‘Online’ is a bit of a misnomer. Hi, We have SQL Server 2005 EE 62 bit with SP3. Enable Row Level and Page Level Locks. 1 Answer. Many people (and even solutions) in the SQL Server community say you need to look at Index Fragmentation levels (e. Merging the full-text index fragments can improve performance and free up disk and memory resources. Now, all you have to do is download the T-SQL script, execute it on your Azure SQL DB and execute the maintenance procedure. The reason why too many page splits can decrease the performance of SQL Server is because of the large number of I/O operations. dm_os_performance_counters where counter_name = 'page splits/sec'. Note. It is used when the operation takes a. " - Fortune Cookie Wisdom . Largest table has around 500. You need to assemble the SQL prior to calling SP_ExecuteSQL, i. Този браузър вече не се поддържа. 04. Rebuild the NCIs. If it's a rebuild, it'll have to roll back, which is single threaded, and may take a very long time. In Object Explorer, right-click the table with columns you want to reorder and select Design. (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. Just go to the table, further expand the indexing folder and right after that you can right-click on it and select the option to rebuild all the indexes. You can read more on rebuilding indexes here . Hi, Added an index maintenance job (Hallengren) to a database (SQL Server 2016) with a few large tables. Index maintenance such as index rebuilds are also a wasteful operation. The second set of options, in figure 8-5, rebuilds only a single partition of a clustered columnstore index and optionally changes the compression type. For the unchecked option, TRUNCATEONLY is applied which prevents the SQL server from performing any data reorganising. As you see, with index pages cached in memory, index rebuild time is just 10 seconds as it is shown in Figure 5. Ideally , microsoft suggests that reorganize should be used for index fragmentation between 5 and 30 % and rebuild for > 30%We will use 3 statements in order to show the blocking: ALTER INDEX. Suggest rebuilding all tables -- Ouch -- followed by. resume public static final EAlterIndexOption resume. ALTER INDEX ALL ON [table_name] REORGANIZE; However, if you want to rebuild all the indexes on the table,. If you want to try : I would like you to use READ_COMMITTED_SNAPSHOT isolation level for this operation and see if you succeed. This happens approx. less than 10% logical fragmentation, don’t. 1. So far, all good. 0. REBUILD vs. SQLBits is the largest Microsoft Intelligent Data Platform conference with over 300 sessions from March 13-18, including SQL Server, Azure SQL, Power BI, Machine Learning, and more! Your customers can reconnect with old friends, build new relationships, gain new skills, and get world-class training. ALTER INDEX (Transact-SQL) Salt la conținutul principal. Make sure to thick the Enabled checkbox. For legacy reasons, we have a single full-text catalog that contains all of our full-text indexes. Total fragmentation is 96% page fullness 66%, avg row size is 20,. How to reorg table in sql server like in oracal or db2? · If you explain what, technically, reorg does in those platforms, it will be easier for us to give a good answer. The REORGANIZE just ran until the log expanded and consumed all disk space. SQL Server 2005 and later provides a dynamic management function (DMF) to determine index fragmentation level. In my 2-day SQL Critical Care®, I quickly assess your application’s performance, determine the root cause of the slowdowns, and then get everyone on the same page for permanent pain relief. This is great if you want to release some space quickly without having an immediate performance impact, however it can effect ongoing performance as the database will become fragmented. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Causes stored procedures, triggers, and user-defined functions to be recompiled the next time that they're run. REORGANIZE Tells SQL Server to perform a master merge, which involves merging the smaller indexes created in the process of indexing into one large index. For memory-optimized nonclustered indexes, memory consumption. Shrinking is a wasteful operation. Right-click the table on which you want to specify an index's fill factor and select Design. Applies to: SQL Server, Azure SQL Database, and Azure SQL Managed Instance. The documentation for alter index, for example, shows that it accepts an index_name, not an expression that might evaluate to an index name. RS Repacked Basic Script available time ago and free to use on MSDN: “SQL Script for SQL Index Maintenance (Degraf or Rebuild)” HOW SYSTEM WORK ? Example : Analysis indexes defragmentation RATIO < 30% * “30” is an arbitrary decision point at which to SWITCH between REORGANIZING OR REBUILDING. 2. After this command is completed, in the command prompt we press Ctrl+C to shut down SQL Server: Now, if we start the SQL Server instance. It's very easy to use. Perhaps it is useful to understand which operation is more effective and which operation is more efficient. . I'd just add that adding the line PRINT @sql after the SET @sql =. Agreed, this table is tiny, we have different tables on the same server with millions of records, that rebuild/reorganize in <1 minute. From SQL Server 2014, you can use the WAIT_AT_LOW_PRIORITY option to delay the potential for blocking – see this blog post. Use nvarchar(max), varchar(max), and. Monitor tempdb during rebuild operations. New The Reorganize Index task also includes an option to compact large object data. If the older date partitions are pretty static , you might benefit from partition level index rebuild / reorganize, depending on sql server version. SQL Server Interview Question | What is the difference Betwee…Options New Connection dialog box See also Applies to: SQL Server Use the ReorganizeIndex Task dialog to move index pages into a more efficient search order. The below T-SQL statement can be used to retrieve these wait types: 1. The fill factor determines the amount of empty space on each page in the index, to accommodate future expansion. While page splitting is a normal SQL Server activity, too much page splitting can cause performance issues because it results in index fragmentation,. If an index is between 10% and 30% fragmented, I will REORGANIZE the index and UPDATE the statistics. Scale back down once the index rebuild is complete. Online rebuilds are online available on the Enterprise version of SQL Server and your version probably isn't, so just set the operation not to be run "Online" on you Wizard. When I run alter index index [IndexName] on dbo. Values: - 0: The script will reorganize or rebuild the fragmented indexes. How to ALTER INDEX for every Table in my DataBase. This is great if you want to release some space quickly without having an immediate performance impact, however it can effect ongoing performance as the database will become fragmented. PerformActions () If I look at the message for the actual job, all it says is "_Job 'Backup. SQL Server database mirroring is a disaster recovery and high availability technique that involves two SQL Server instances on the same or different machines. The fill factor is 0. Product REBUILD GO Index Reorganize : This process physically reorganizes the leaf nodes of the index. How to Reorganize a Table (Doc ID 151588. インデックスの断片化の状態がわかったら、それによってインデックス (index) を再構成 (Reorganize)するか、または再構築 (Rebuild) するか決定します。. In SQL Server, rowstore refers to a table where the underlying data storage format is a heap, a clustered index, or a memory-optimized table. Reorganizing or rebuilding a cluster index does not have any impact on the non-cluster indexes in SQL Server 2000 SP4 or above, or any version of SQL 2005 or. Rebuild Index using ApexSQL Defrag ApexSQL Defrag Overview. USE AdventureWorks; GO ALTER INDEX ALL ON Production. Speaking for SQL Server, I tend to choose a index size and index fragmentation level at which point I begin performing index maintenance. Replace XXXMYTABLEXXX with the name of a table. For more information about managing indexes, see Reorganize and. Running the compaction again may or may not improve the situation. Columns with text, image, ntext, varchar (max), nvarchar (max) and varbinary (max) cannot be used in the index key columns. Syntax ALTER INDEX index_name ON table_name. The Query Optimizer. Last weekend the index maintenance took more than 5 hours and the full backup was running at the same time. Usually you'd do weekly or daily depending on your usage and maintenance windows. You can go the easy way and use SQL Server Maintenance Plans, but unfortunately they’re very simplistic: you can only say “rebuild all the indexes” or “reorganize all the indexes”. Apply SQL Server index key column best practices. Now, let’s run index rebuild again. By re-organize I mean that both tables and indexes are left with no fragmentation. T-SQL script. ALTER FULLTEXT CATALOG [CatalogName] REBUILD. dm_db_index_physical_stats (Transact-SQL). The intent of this SQL Server query is to: Dynamically work rebuild/reorganize all indexes in all tables in all databases on a server. For a dedicated SQL pool table with an ordered CCI, ALTER INDEX REBUILD will re-sort the data using tempdb. Click the "Generate Change Script" button: Now a window will open that contains the script to apply this change: Copy the text from the window. Index on msdb. ALTER INDEX ALL ON table_name REBUILD OR. Expand the table on which we want to reorganize the indexes. ALTER INDEX [myIndex] ON [dbo]. If you read complete article it was trying to point out the commands or operations in SQL Server which would require additional disk. As data is added to the table, the free space fills because the fill factor isn't maintained. [MyTable] REORGANIZE WITH ( LOB_COMPACTION = OFF ) is failing with this error: Transaction (Process ID xxx) was deadlocked on lock | communication buffer resources with another process and has been. Membangun kembali atau mengatur ulang indeks rowstore kecil mungkin tidak mengurangi fragmentasi. Take a look at what other children have. * Execute without specifying a schema to check user tables in all schemas. In-memory nonclustered indexes are implemented using a data structure called a Bw-tree, originally envisioned and described by Microsoft Research in 2011. I have a SQL Server 2016 database with RCSI enabled that is literally a heap of heaps. Feb 21, 2022, 8:01 AM. The Reorganize Index task encapsulates the Transact-SQL ALTER INDEX statement. We choose "All databases, leave the default values of two other options and click "OK". Viewing 15 posts - 1 through 15 (of 16 total) 1To reorganize index SQL Server, right-click it & choose Reorganize. Reorganize does not holds blocking locks. It defragments the leaf level of clustered and nonclustered indexes on tables and views by physically. This key helps a Database like Oracle, SQL Server, MySQL, etc. If you need more tempdb space, scale up the pool. When new data is. The solution to fragmented indexes is to rebuild or reorganize indexes. If there is no room for it, then SQL Server will reorganize the rows, moving some of the rows onto a new data page, and leaving some on the old data page. Solution Usually, when indexes are not too fragmented (as suggested by Microsoft, when fragmentation level is between 5% and 30%), it is recommended to reorganize indexes. Job 'Backup. If the command that's running is a reorg, you can just kill it. [myTable] REORGANIZE WITH ( LOB_COMPACTION = ON ) I have the above query running for 16 days (still running), the table is a dummy table used for benchmark tests, it has over 10 Billion rows. The first rebuilds a single index on a table and the second rebuilds all the indexes on the table. The. We know for sure locking/blocking is occuring, since the table is under heavy use in the maintenance window. SQL Server does not maintain when an Index was last rebuild, instead it keeps information when stats were last updated. SQL Server offers REBUILD and REORGANIZE options, but they are available only for a full-text catalog (which may contain any number of full-text indexes) in its entirety. If you cancel a rebuild operation midway, it. x), Mesin Database SQL Server mengalokasikan ruang menggunakan tingkat campuran. Needless to say that in order to defrag a. These are two different modes to remove index fragmentation. . Your applications would read the data from left to right as you would with a book. This is how you end up with a row store. Because I was blamed for the slow SQL Server mainly because I stopped a. create table dbo. As you've seen, shrinking your database causes high levels of index. sp_resetstatus tempdb. Copy and paste the following example into the query window and select Execute. Reorganize and Rebuild Indexes; SQL Server 2005 Index Best Practices; Fixing Index Fragmentation in SQL Server 2005 and SQL Server 2008; Sample Table for SQL Server Index Performance Testing. As visible in the above image, REBUILD and REORGANIZE are the two available choices to play out the trim operation over the page. Deletes catalog and creates new. Reorganizing only works on the leaf pages. Expand the domain, Nodes, Server, and right-click on the server you want to run the webserver on. ;WITH cte AS ( SELECT object_id, index_id, partition_number, rows,. REORGANIZE, UPDATE STATISTICS and a simple SELECT statement. Use sp_rename: EXEC sp_rename 'Stu_Table', 'Stu_Table_10'. April 1, 2009 at 5:07 am. k. This option should be used with great care. 0 databases. He loves SQL Server query optimizer`s capability to process the queries optimally. There's a general consensus that you should reorganize ("defragment") your indices as soon as index fragmentation reaches more than 5 (sometimes 10%), and you should rebuild them completely when it goes beyond 30% (at least that's the numbers I've heard advocated in a lot of places). dm_db_index_physical_stats ) function accepts parameters such as the database, database table, and index for which you want to find fragmentation. To configure this option, open a maintenance plan and on the top bar beside Manage Connections…. REBUILD. The execution time of the select in my system is 1 minute and 3 seconds as it is shown in Figure 4 below. ". With the exception of one table, every other table in the database is a heap and the largest heap is ~200GB which makes up over 50% of the total size of the database. This means every time we need to scan the. Options New Connection dialog box See also Applies to: SQL Server Use the ReorganizeIndex Task dialog to move index pages into a more efficient search order. @databaseToCheck (optional) Values: - NULL: It will scan all databases with compatibility level SQL Server 2005 (90) or later. Also when I try to reorganize or rebuild manually, using one of the following commands: use DBNAME. It also performs online defragmentation. The index it is running against is 78% fragmented. Correct way of maintenance of SQLServer Cluster Columnstore Index. resume. Expand the table on which you want to reorganize an index. Write own SQL proxy client replacing — HIDDEN MESSAGE with ORDER BY . Index Rebuild : This process drops the existing Index and Recreates the index. Expand the Indexes node. OBJECT_ID) AS TableName,ALTER INDEX (Transact-SQL) Skip to main content. USE AdventureWorks; GO ALTER INDEX ALL ON Production. You could also refer another query which may be helpful to you. This removes fragmentation, reclaims disk space by compacting the pages based on the specified or existing fill factor setting. But yes. 2. Expand the table on which you want to reorganize an index. A very simple example is when you have two data files within the same filegroup; data_file_1. In SQL Server you can specify a list of columns in the CONTAINS query. Rebuild Index using ApexSQL Defrag ApexSQL Defrag Overview. If you got an active connection in that moment, it is possible to happen even a deadlock when the other connection is making an update. For rebuild/reorganise and statistics there are scripts (such as SQL Fool's one) that do a better job. Open your table in SSMS in design mode: Reorder your columns: It is important to not save your change. For example, the heaviest index (clustered index and also pk) is running reorg for around 4 hours 30 min even do the index was. Reading such data follows the same format. We have a maintenance script which analyses the page_count and fragmentation of the indexes and follows the following guideline:-. partitions. Rebuildes only indexes on one of the tables. With SQL Server there are several options that you can use to perform maintenance tasks. 3rd party scripts can choose the best option. Expand the Tables folder. March 8, 2013. alter-index-rebuild-reorganize. sqL_handLe sqL. Dec 19, 2021, 9:55 PM. All Methods Static Methods Concrete Methods ;. REORGANIZE, but shrink is going to take an age, and then you’ll generate a ton of log doing the fragmentation removal. In Object Explorer, connect to an instance of the SQL Server Database Engine and then expand that instance. Create a non-clustered. It does this by dropping the existing plan from the procedure cache, forcing a new plan to be created the next time that the procedure or. Test REORGANIZE WITH (LOB_COMPACTION = ON); This results in some compaction and space savings, but it is not perfect. - 1: The script will just output the index reorganization or rebuild commands without running them. If there are frequent changes to the full-text catalog, use this command. Applies to: SQL Server 2016 (13. I used the sp_who2 procedure to see which queries were waiting, and which other query they were blocked by. reorganize. サーバーのパフォーマンスと利用状況の監視. The index fragmentation level can be found using the sys. Yes. below line will remove the NULL value from the query. SQL Server Maintenance plans – Maintenance plans are shipped with SQL Server and are nice for some tasks. m. x), o Mecanismo de Banco de Dados do SQL Server aloca espaço usando extensões mistas. The most cost effective free traffic. When a table has multiple indexes, create the clustered index first, then the nonclustered. For rebuild/reorganise and statistics there are scripts (such as SQL Fool's one) that do a better job. In the IndexOptimize procedure, you can define a preferred index maintenance operation for each fragmentation group. Drag and drop the index rebuild task from the maintenance plan toolbox. Product REORGANIZE GO. In order to rebuild the index SQL Server still needs a copy of the data and must reorganize the data as the index is rebuilt. WITH FULLSCAN. Therefore you need to identify those tables/indexes & you need to do the re. is_ms_shipped = 0 --Excludes any objects created as a part. That can be found using the STATS_DATE function. Starting with SQL Server 2016 (13. Faceți upgrade la Microsoft Edge pentru a profita de cele mai noi funcții, actualizări de securitate și asistență tehnică. Index Rebuild operation first drops and then recreates the index. When I run a maintenance plan to reorganize and rebuild tables indexes, it fails. You can add a rebuild index task or reorganize index task into the maintenance plan, but the problem is that you can't really apply any logic to the plan. AFTER DECISION: DO THAT !. A table may only have one columnstore index on it at a time, regardless of whether it is clustered or nonclustered . The following example returns all statistics for all tables and indexes within the instance of SQL Server by specifying the wildcard NULL for all parameters. This means that an index can be rebuilt without knowing the structure of a table or its. If you don’t specify the string length, its default value is 1. The only particularity is that in Hyperscale, there is only one filegroup. If you need to include a schema name, this can. Ola Hallengren Parameters for Index Rebuild/Reorganize on SharePoint. Expand Fill Specification, select the Fill Factor row and enter the fill factor you want in the row. 2 – Two minutes later, a background task is blocked by the index. They work differently toward the same end. Neeraj Prasad Sharma is a SQL Server developer who started his work as a dot net programmer. Open configuration manager and get account name. Overview of SQL Server NVARCHAR data type. For example, one of the indexes with a page_count of 967 has a fragmentation percentage of. Use the Rebuild Index Task dialog to re-create the indexes on the tables in the database with a new fill factor. indexstats. See the maintenance plan and SQL Server Agent job history logs for details. Beginning with SQL Server 2016 (13. e. The first file has 100MB free space and the second has 200MB free. You may also want to add a try/catch block so that those tables that do not support online indexing don't cause the entire operation to fail. With Query Builder for SQL Server, you can quickly and easily create pivot tables, filter data, and build charts to analyze your data. Proceed to the Steps tab: Clicking on New. SQL DBAs and Operations Engineers tools. 1 Answer. Method 2: Manually create rebuild job using scripts and scheduled as. Select the box to the left of the column name that you want to reorder. 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. [Product] SET ( ALLOW_PAGE_LOCKS = ON ) ALTER INDEX [PK_Product] ON [Production]. The following table lists the types of indexes available in SQL Server and provides links to additional information. Pinal Dave is an SQL Server Performance. [myTable] REORGANIZE WITH ( LOB_COMPACTION = ON ) I have the above query running for 16 days (still running), the table is a dummy table used for benchmark tests, it has over 10 Billion rows. If you use Ola Hallegren's scripts then you can set the thresholds for a rebuild/reorganise (say over 50% fragmentation for a reorganise, over 80% for a rebuild) and this can run overnight out of hours. In this instance, it generated the following code:Reorganize the full-text catalog by using ALTER FULLTEXT CATALOG REORGANIZE. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance SQL Server, Azure SQL Database, and Azure SQL Managed Instance support table and index partitioning. For maintenance i create a procedure that: -Shrink Database file (if is enabled) -Shrink Database log file. . It depends on your environment, on the type of load (mostly select, mostly insert/update/delete), etc. Note: reorganise and rebuild are not exclusive but work different ways. I used this approach to improve performance and it worked perfectly for a long time. avg_page_space_used_in_percent column in the sys. These pages can get empty space on them and become out of order over time as well. Product REORGANIZE GO. We know for sure locking/blocking is occuring, since the table is under heavy use in the maintenance window.