Transact SQL :: How Much Space Is Required By Index Rebuild Command For Each Database
Sep 24, 2015
I'm upgrading to SQL 2012 from 2008R2, while doing so i will be rebuilding all the indexes on all the database. In my previous environment while doing so, i got space related error in primary filegroup for insufficient space in the primary filegroup. Is there any rule of thumb about how much space is required by index rebuild command for each database, or is there a safe threshold for free space in the database?
I'm trying to determine how much space I would need for my data drive and log file drive to do index rebuild. I have a database which is 100gb, it is in simple recovery mode. let me know what to have a look at to determine how much space.
I would like to completely understand the difference between index rebuild Maintenace plan and the customized script.Maintenance Plan rebuilds every single index.It will take the long time as it checks every index.If we use a custom script as a job, it will rebuild the index which has fragmentation >30%.So that, the job will not take much time.
On our particular database server, we run the Rebuild Index Task (Using classic Maintenance Plan Designer) every night. Running the script below, I saw that about 77 tables had an avg_fragmentation_in_percentage between 80% and 99% !!
SELECT OBJECT_NAME(ind.OBJECT_ID) AS TableName, ind.name AS IndexName, indexstats.index_type_desc AS IndexType, indexstats.avg_fragmentation_in_percent FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL, NULL) indexstats INNER JOIN sys.indexes ind ON ind.object_id = indexstats.object_id AND ind.index_id = indexstats.index_id WHERE indexstats.avg_fragmentation_in_percent > 30--You can specify the percent as you want ORDER BY indexstats.avg_fragmentation_in_percent DESC
I dont understand why these tables are highly fragmented after a daily index rebuild! Unless the users are doing heavy inserts/updates/deletes during the day.
We have 3 maintenance jobs configured in this particular DB instance:
Daily backup of system database - SubPlan1 (Check Database Integrity Task --> Rebuild Index Task-->Backup Database Task)Daily backup of user databases - Five subplans for each task : (Check DB integrity --> Rebuild Index -->Backup User Database, Backup Log -->Cleanup History)Weekly maintenance - SubPlan1 (Check Database integrity job (system+user DB) + rebuild index job (system+user DB) )
PROBLEM: I just noticed that the User DB Rebuild Index task has been running since the 03/04 and the Weekly maintenance plan - subplan1 since the 12/04.
Which job is "safe" to stop without impacting the database?
My SSIS package is running very slow taking so much time to execute, One task is taking 2hr for inserting 100k records, i have disabled unused index still it is taking time.I am rebuilding/Refreshing indexes and stats once in month if i try to execute on daily basis will it improve my SSIS Package performance?
Normally we use rebuild, reorganize indexes when it is required, I used a SQL job using maintenance plan to run daily and rebuild, reorganize indexes and update statistics but I do not know if it runs either they are required or not. Should this plan automatically execute the build upon required indexes to be rebuild or it fires either they are required to be executed or not.
best method to my issue regarding unused space. SQL SERVER 2014 BI EDITTION..I have a table that showed 62% Data, 7% unallocated, and 29% unused space.I ran the ALTER TABLE <table name> REBUILD, which changed it to 32% data and 67% unused.What I do with this table monthly and what I believe is causing this unused space issue is this:Every 1st of the month I get a csv file that holds around 3.2 million rows/15 columns of data. About 3 gbs every time.It's 13 months of data. I remove the last 12 months from the current table and import the new 13 month data.I do this twice a month and have no choice because the data is constantly updated and why we get it twice a month.So I am deleting around 6 gbs of data a month as well as adding around 6 gbs of data a month.
I believe this is why I end up with so much unused space, but just found the REBUILD command, which worked but now a small hit on performance and have too much space in the current table. I have read several times that shrinking the file is no good, but what other way to get rid of the extra space in this table? Also, the table doesn't have any indexes or primary key because of duplicates.
I am using SQL Server 2008 (RTM) Standard Edition.
In my environment, one of my Database size is 75 gb and I have to create a plan for index rebuild using maintenance plan.But when we rebuild indexes, it requires some space on data and log files of database.how can we calculate disk space requirement for index rebuild process ?
Rebuild Index job for user db's is failing, one user db is a huge size 120 GB. The job scheduled to run every sunday 1 AM
I found the below error in log report
Rebuild Index Task (server name) Rebuild index on Local server connection Databases: All user databases Object: Tables and views Original amount of free space Task start: 01/13/2008 1:26 AM. Task end: 01/13/2008 2:38 AM. Failed-1073548784) Executing the query "ALTER INDEX [Idx_CISCO_WLC_EVENTID] ON [dbo].[CISCO_WLC_200711262137] REBUILD WITH ( PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, SORT_IN_TEMPDB = OFF, ONLINE = OFF ) " failed with the following error: "Cannot find the object "dbo.CISCO_WLC_200711262137" because it does not exist or you do not have permissions.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
I am using the below script to get space alerts and now i am interested in sending alerts if for any drive space available is Less than 10% or 15%.. how to convert beelow code to find in %
I have a table with over 60 million rows (approx 20GB) which has an indexed column. I have tried using DBC DBReindex to rebuild the index, but after kicking it off on a friday, it is still running the following wednesday. Since managers and other finicky types access this database, that's not acceptable (it slows down their reporting).
Is there a way to speed up the reindexing process? Perhaps by adding space to the tempdb (it's 500MB) or putting it in RAM temporarily? I haven't seen any articles that specifically state that TEMPDB is used during an index rebuild, but it seems logical that it would be.
Any suggestions to speed up the process would be most appreciated!
This seems like a pretty straightforward question, but since I've been trying to find this in BOL and not having any luck, I thought I'd ask some folks more experienced than I.
How much room do I need on a SQL box to restore a 6.45 gig database? (it's going from a huge machine to a backup tape, then from the backup tape to a much smaller machine for testing an app, and we're trying to find out what we need to do to make it all work out.)
I'm assuming that I would need significantly more than the 6 gigs of the db for the work of actually doing the restore, but can't find out how much more...
Fellow MSSQL DBA's, I am stuck. I am getting a Msg 2511 on a production database. The message reads - Table Corrupt: Keys in leaf page should be in ascending order. I have dropped the offending index and rebuilt both through the application and through ISQL. Neither method fixed the problem. DBCC CHECKDB shows no errors as long as the index does not exist. I have checked out the data and see no problems. Any ideas? Thanks very much.
In SQL Server 2005 EE I created a maintenance plan to rebuild indexes for a few large tables. I have selected five specific tables, and I'm using both "sort results in tempdb" as well as "keep index online while reindexing".
If I execute this plan for all these tables, are the indexes guaranteed to remain online? There are all different types of indexes on these tables. For example, the table "Contacts" has 8 indexes: 1 Clustered, 1 PK Unique Non-Clustered, 2 Unique Non-Clustered, and 4 Non-Unique Non-Clustered. I've heard that only certain types of indexes can remain online during a reindex (Clustered and Non-Unique Non-Clustered??).
Will SQL Server rebuild an index that isn't compatible with the online reindex mode, or will it choose to ignore it?
SQL Server 2005 version: 2153 I created a maintplan for system and user databases includes rebuild index, maint cleanup tasks.
Job is failing for user databases It includes rebuild index task( online index enabled) and maintenance cleanup task, scheduled at every sunday 1 AM.
I receive following errors:
In eventvwr log
sql server scheduled job 'DBMP_RebuildIndex_User' status: failed-Invoked on 2007-12-02 -1:00 Message: The job failed. The job was invoked by schedule 8 ('DBMP_RebuildIndex_User-Schedule).The last step to run was step1 ('DBMP_RebuildIndex_User')[/red]
In log report:
Failed:(-1073548784) Excuting the query "ALTER INDEX [XPKact_log] ON [dbo].[act log] REBUILD WITH (PAD_INDEX=OFF, STATISTICS_NORECOMPUTE=OFF,ALLOW_ROW_LOCKS=ON,ALLOW_PAGE_LOCKS=ON,SORT_IN_TEMPDB=OFF,ONLINE=ON) "failed with the following error "Online index operation cannot be performed for index 'XPKact_log' because the index contains column 'action_desc' of data type text, ntext.image.varchar(max),varbinary(max) or xml. For non clusterd index the column could be an include column of the index. for clusterd index it could be any column of the table .Incase of drop_existing the cloumn could be part of new or old index. The operation must be performed offline". Possible failure reasons : Problems with the querey .'" Resultset" property not set correctly, parameters not set correctly, or connection not established correctly.
Please anyone help me on this? I really appriciate
After rebuilding an index, it still shows as the same amount offragmentation. ANy ideas what's wrong?I'm determining which indexes to rebuild using the following query:SELECTOBJECT_NAME(i.object_id) AS TableName,i.name AS IndexName,ips.avg_fragmentation_in_percentFROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL,'DETAILED') ipsJOIN sys.indexes i ONi.object_id = ips.object_idAND i.index_id = ips.index_idWHERE ips.avg_fragmentation_in_percent > 10(I know 10% is not enough where a full rebuild is called for, justwanted to see my fragmentation)Then I rebuild w/:ALTER INDEX IX_CustomerName ON Customers REBUILDWhen I rerun the 1st query the same amount of fragmentation is shownas before the rebuild. I'd appreciate any help.
Hi Folks,SQL Server 2000 SP3 on Windows 2000. I have a database on which I ranthe command :dbcc dbreindex ('tablename')gofor all tables in the database. Then I compared the dbcc showcontigwith all_index output from before and after the reindex and on thelargest table in the database I found this. First output is prior toreindex:Table: 'PlannedTransferArchive' (1975014117); index ID: 1, database ID:7TABLE level scan performed.- Pages Scanned................................: 184867- Extents Scanned..............................: 23203- Extent Switches..............................: 23324- Avg. Pages per Extent........................: 8.0- Scan Density [Best Count:Actual Count].......: 99.07% [23109:23325]- Logical Scan Fragmentation ..................: 11.13%- Extent Scan Fragmentation ...................: 35.46%- Avg. Bytes Free per Page.....................: 60.0- Avg. Page Density (full).....................: 99.26%Second output is from after the reindex:DBCC SHOWCONTIG scanning 'PlannedTransferArchive' table...Table: 'PlannedTransferArchive' (1975014117); index ID: 1, database ID:8TABLE level scan performed.- Pages Scanned................................: 303177- Extents Scanned..............................: 37964- Extent Switches..............................: 42579- Avg. Pages per Extent........................: 8.0- Scan Density [Best Count:Actual Count].......: 89.00% [37898:42580]- Logical Scan Fragmentation ..................: 43.19%- Extent Scan Fragmentation ...................: 24.78%- Avg. Bytes Free per Page.....................: 75.1- Avg. Page Density (full).....................: 99.07%Following are my concerns:The following numbers are all higher after reindex than before reindex:pages scanned, extent switches, logical scan fragmentation, avg bytesfree per page, avg page density.scan density is lower after reindex than before reindexSeems to me that the numbers that are higher after reindex should belower and numbers that are lower after reindex should be higher? Ididn't specify the fill factor in the dbcc reindex command so it shouldhave used the default fill factor. The fill factor has never beenchanged on this machine.Am I missing something?Thanks,Raziq.*** Sent via Developersdex http://www.developersdex.com ***
Rebuild index maintenance plan is failed, since we don't have space in the C:Drive we have left the option as it is to sort the results in user databases respectively. These user databases are in E: with sufficient space to rebuild index.
Check the below details.
SQL Server 2005: Microsoft SQL Server 2005 - 9.00.5000.00 (X64) Dec 10 2010 10:38:40 Copyright (c) 1988-2005 Microsoft Corporation Standard Edition (64-bit) on Windows NT 5.2 (Build 3790: Service Pack 2)
Online reindexing supports in SQL Server 2005 Standard Edition? Job is failing because these options (sort results in tempdb & keep index online while reindexing) is not checked (enabled)?
I have read through BOL but am still confused by the above sql. I think it rebuilds all indexes on a table. Am I correct? (If so, if would seem to be a good thing to run it nightly on all tables in all databases. Or maybe that is too extreme)
