Comments on: SQL SERVER – Fragmentation – Detect Fragmentation and Eliminate Fragmentation

By: Satya

Satya — Tue, 07 May 2013 03:21:27 +0000

How to find out the Rebuild o reorganize the index based on the fragmentation, when it is 10 to 30 % we reorganize and when it is more than 40% we must rebuild it. how do i set this criteria in the maintenance plan ? Can you please suggest me. to put maintenance plan to reorganize or re build indexes automatically

By: CaveMan

CaveMan — Sun, 05 May 2013 13:27:10 +0000

Thank you again. Because B-Tree is the bases of SQL index I did not think a clustered index would matter.
I read that when a non unique index is created on a table, SQL server adds a another byte or so to make the index unique. Is this true?
Is it better to create a unique clustered index than a nonunique one ??
Thanks

By: Danny

Danny — Wed, 17 Apr 2013 13:26:49 +0000

Hi Pinal,
I am agree with Mike Dowel.
“Your way of explaining is way way better than some of the blog authors I read.

No matter what you write and how you write… you are always going to be one of my personal favorite. ”

Just like I am following a course from a SQL Guru!
Thanks for all the articles !!!

By: khuynh

khuynh — Fri, 15 Mar 2013 01:34:53 +0000

First off, this has been extremely useful. However I’m unclear about one issue that was asked above and I’m having the same problem.

Taruna wrote:

“Hi Pinal,

Thanks, I understand the query, but my results give me lots of ‘null’ values for the object_name, which makes no sense. Any idea as to how to reslove this as many of the indexes really do de-fragmenting.

Thanks,

Taruna”

What was the resolution to that question?

Thanks.

By: Rajesh

Rajesh — Wed, 06 Mar 2013 07:06:55 +0000

hi,

‘(‘ delete and write again ‘(‘ it will be successfully

By: Kim

Kim — Tue, 05 Mar 2013 10:13:58 +0000

hi,

i tried this query .

there is repeat in index name and from same table …
ex

T_AirportInformation PK_T_AirportInformation 93.08056872 1055 CLUSTERED INDEX
T_AirportInformation PK_T_AirportInformation 100 3 CLUSTERED INDEX
T_AirportInformation PK_T_AirportInformation 0 1 CLUSTERED INDEX

like this why table and same kind of index is repeated ?

By: areaTIC.net (@areaTicnet)

areaTIC.net (@areaTicnet) — Fri, 22 Feb 2013 12:32:01 +0000

Hi, I am getting the same error in SQL Server 2005 and I resolved it:

/* Get the database ID, for example 12345 */
SELECT DB_ID(N’AdventureWorksLT’)

/* Use de database ID 12345 in the Pinal’s query */
SELECT OBJECT_NAME(OBJECT_ID), index_id,index_type_desc,index_level,
avg_fragmentation_in_percent,avg_page_space_used_in_percent,page_count
FROM sys.dm_db_index_physical_stats
(12345, NULL, NULL, NULL , ‘SAMPLED’)
ORDER BY avg_fragmentation_in_percent DESC

By: jamesj

jamesj — Mon, 04 Feb 2013 03:35:39 +0000

I am getting the same error as well, but I thought it might be because I was trying to do it dynamicly with sp_msforeachdb

By: cri

cri — Mon, 28 Jan 2013 12:05:04 +0000

Interesting, so what’s the advice of this DEITY to remove fragmentation of a heap without turning it into a clustered index? I don’t see any other possibility than create/drop a clustered index. If this is his stance on the argument, then why didn’t MS think of a tool (e.g. a DBCC command) to degrafment heaps? And why doesn’t Paul reply for himself? Too high to get down into human’s affairs?

By: Harshavardhan

Harshavardhan — Tue, 15 Jan 2013 06:18:09 +0000

HI
when i execute the query given to check the fragmentation percent it is giving an error saying “Msg 102, Level 15, State 1, Line 4 Incorrect syntax near ‘(‘.”
what can be done.

is it specifig to any version.
Am using SQL Server 2008 R2.

Please let me know asap.

By: SQL SERVER – Weekly Series – Memory Lane – #011 « SQL Server Journey with SQL Authority

Sat, 12 Jan 2013 01:31:13 +0000

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By: Randy

Randy — Fri, 07 Dec 2012 19:26:19 +0000

Well said sir!

By: pinaldave

pinaldave — Fri, 07 Dec 2012 19:10:36 +0000

Randy – Paul Randal is the BEST SQL Expert EVER (period).

I am fortunate to have his guidance.

By: Randy

Randy — Fri, 07 Dec 2012 18:50:23 +0000

Boys, do your selves a favor and slow down a bit. Paul Randal is like a minor deity in MS SQL. He works for Microsoft’s SQL development group and wrote portions of the product. I’ve personally seen his name in system stored procedures.

By: Rajeev

Rajeev — Fri, 23 Nov 2012 04:48:45 +0000

Hi Pinal,

Thank you for your valuable article.

We have set the fill factor 80 for a sharepoint database server (serverwide setting). But one index rebuild job is running offline everyweek in the same server for all the databases with fill factor 70. The database is performing slow due to high level of fragmentation. Is this can be a reason for the slowness, if yes what should be the ideal value of fill factor? It is SQL Server 2012 and sharepoint 2010. Please help us regarding this.

Rajeev

By: Vijay Sutaria

Vijay Sutaria — Fri, 02 Nov 2012 08:11:48 +0000

Hi Pinal,

Thanks for this very important and useful article.

Please suggest your view on “Remove Fragmentation from the table which is having UniqueIdentifier column as a PrimaryKey”.

By: Uttam Atri

Uttam Atri — Thu, 18 Oct 2012 06:22:59 +0000

Dear Pinal, kindly tell me is this feasible for sql server 2000 also

Regards
Uttam

By: Taruna

Taruna — Mon, 01 Oct 2012 14:30:52 +0000

Hi Pinal,

Thanks,

Taruna

By: someone

someone — Sat, 23 Jun 2012 10:21:42 +0000

Don’t ever follow “Don’t ever” advise.

By: Juan

Juan — Mon, 28 May 2012 06:48:09 +0000

Hi can you explain me something ?

I have de table with 45 millions reccords in a SQL2012 DB no primary key and no clustered index (not made by me ;) )

All my index are fragmented at ~99% and when i run this query :

ALTER INDEX ALL ON [Table_Name] REBUILD PARTITION = ALL
My fragmentation is at 0% great

But at this point the sqlserver process start using 15% to 20% of CPU and accessing the disk non stop during 2 or 3 houres and when it stop, the fragmentation is again at ~99%

I am the only one who use the DB…

should I kill someone or do magical incantation ? What is the problem of my database ?

By: smzuber

smzuber — Thu, 05 Apr 2012 10:58:00 +0000

Hello Pinal Dave

i would like to know the use of “FILLFACTOR option” at indexes

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Wed, 04 Apr 2012 01:31:44 +0000

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By: Vandana

Vandana — Wed, 01 Feb 2012 12:06:41 +0000

Hi Pinal

Is it recommended to create a maintenance plan for Index Rebuilding? What are the pros and cons?
I am planning to create the plan, so it will be a great help for me, if i could get the answer.

Thanks a lot

Vandana

By: Ola

Ola — Fri, 13 Jan 2012 01:20:07 +0000

Hi Guys,

Pls how do i know findout what Index has been affected from the (no Column Name).
example DF_Billofmaterilas_statdate

so i can use the right statement

Alter index …….. on ………………….
rebuild

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