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I Cannot Defrag .mdf File


But this does get the most critical files defragmented first. Not that deframgmenting it makes sense given that - well - th e content are fully random access anyway. In fact, the documentation for this particular SAN (which shall remain nameless in order to protect the guilty) suggested that an OS level defragmentation should be carried out regularly (?!). Thanks!

Friday, September 13, 2013 - 10:24:28 AM - Bill Back To Top Were your tests performed on a single disk or a disk array? GO OUT AND VOTE Who was the first comic book artist to use Toad's slime in comics after the first X-Men film was released? In my larger organization, we utilize SAN storage and I am assured by the storage admins that the management software for the SAN takes care of managing fragmentation. share|improve this answer answered Apr 6 '09 at 15:22 jason saldo 5,81942637 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google http://serverfault.com/questions/392494/why-cant-i-defragment-my-sql-2008-mdf-file

Sql Database Defragmentation

Note: your email address is not published. We have been looking at Diskeeper and have downloaded their free trial version. Should you change a thermostat when changing your water pump Complement of CFL is Recursive What crime would be illegal to uncover in medieval Europe? Can a president win the electoral college and lose the popular vote Why is Professor Lewin correct regarding dimensional analysis, and I'm not?

It is not very expensive either. I will run it before I install SQL Server as well because Windows and all of the software that gets installed to get started fragements the HD. with your description of the problem, we can provide a tested, verifiable solution to your question! What Is Database Fragmentation I’ve been surprised to find that many defragmenters don’t make any attempt to lessen the fragmentation of a file if they can’t defragment it completely.

Should you change a thermostat when changing your water pump Why "silver-tongued" for someone who is convincing? While fragmented files do lead to longer seek times in disk I/O, it's not something you need to consider doing on a weekly basis or anything...i personally use Contig.exe from SysInternals, Original author: SQL Server FineBuild 1-click install and best practice configuration of SQL Server 2016, 2014, 2012, 2008 R2, 2008 and 2005. 29 Aug 2016: now over 38,000 downloads.Disclaimer: All information click resources share|improve this answer answered Jun 3 '12 at 12:12 tcbrazil 22619 LesterDove, did you try to defragment the free space as I told above? –tcbrazil Jun 8 '12 at

Not so much if the file is spread out all over the disk. Defrag Sql Server Hard Drive Post #655473 jmoss111-506838jmoss111-506838 Posted Friday, February 13, 2009 8:52 AM SSC-Enthusiastic Group: General Forum Members Last Login: Tuesday, July 19, 2011 12:11 PM Points: 183, Visits: 149 I run contig.exe on Same goes for the log files...you might see lots of posts where people say they want to recover the space being eaten up by the log....but if your log expands, and We cannot afford that kind of downtime since it is used by our stores 24 X 7 and I cannot prove that is is hampering usage or a defrag will help

Sql Server Data File Fragmentation

Once those are done, then my .cmd file moves on to defrag my .?df files. http://www.sqlservercentral.com/Forums/Topic650537-146-1.aspx After I install I defrag as well. Sql Database Defragmentation comments (0) 20/12 ML Studio login and organisational accounts comments (0) 6/10 Tempdb configuration and performance comments (0) 27/5 FlushCache messages might not be an actual IO stall comments (2) 27/2 Sql Server Defragmentation Best Practices Advertisement Related Articles54 Administration Tips 2 Performance-Tuning the Data Model: Configuring the Database High Availability Solutions 1 New Products, October 2005 New Products, February 2004 Advertisement From the Blogs Sep 15,

Copyright © 2002-2016 Simple Talk Publishing. I did some Google research and apparently it's perfectly safe. CHECKDB Failures caused by Diskeeper Filter Driver Edited by Jonathan KehayiasMVP, Moderator Friday, November 04, 2011 1:23 PM Monday, October 27, 2008 1:47 AM Reply | Quote Moderator 0 Sign more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science Defrag Sql Database 2012

Whatever you do, get a baseline of the latencies before you start so you can compare this to the corresponding figures after the file fragmentation has been removed. more hot questions question feed lang-sql about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Is it an issue and would running a disk defrag for this file improve DB performance? The first thing I would do is check out the IO performance of the database(s) in question.

The Windows Server should be able to find contiguous space for each database. Sysinternals Contig EDIT! Zener diodes in glass axial package - not inherently shielded from photoelectric effect?

In order to defragment a SQL Server, the database service have to be off to use the Windows built in defragmentation utilities.

Required fields are marked with an asterisk (*). *Name *Email Notify for updates *** NOTE *** - If you want to include code from SQL Server Management Studio (SSMS) in your External Fragmentation and Internal Fragmentation are not related. Some of the fragments were only 64K in size. Database Index Fragmentation I will do both types of defragging.

I asked a colleague and they said this may be normal as it just the way that type of file works internally. Technical Editor Log In or Register to post comments Anonymous User (not verified) on Oct 30, 2004 So if you do want to defrag at the OS level, what is the I initially figured it was because MSSQL had an exclusive lock on the file, so I detached it and tried again. Why is this C++ code faster than my hand-written assembly for testing the Collatz conjecture?

Drawing a torso with a head (using \draw) Formula 1 rebus How to prove that authentication system works, and that customer uses the wrong password? We can see after the command there are only 4 fragments. Posted Thursday, February 12, 2009 2:57 AM SSC Veteran Group: General Forum Members Last Login: Tuesday, October 25, 2016 10:42 AM Points: 292, Visits: 967 I think disk fragmentation is bad, Can Trump undo the UN climate change agreement?

Hiten Senior Database Administrator Microsoft SQL Server MVP Top Cannot defragment .mdf file by Adria » Fri, 20 Jan 2006 02:42:59 Geoff, Thanks for the advice. You will have to stop SQL Server to defragment SQL data files. Why can issuing the same command create more output in tty than in pts/gnome-terminal? Now in order to defragment the data file we need to take the database OFFLINE and then run contig and then bring the database back ONLINE.

Monday, October 27, 2008 3:39 PM Reply | Quote Moderator 0 Sign in to vote Perfect. From personal experience, some of the things to look out for include files performing worse than others on the same partition or SAN back-end even though they are not responsible for You cannot send emails. On my (32-bit) server, an edited down version of my .cmd file looks like this: "C:\Program Files\Contig\Contig" -v -s "C:\Windows\System32\drivers\AVG\*.*""C:\Program Files\Contig\Contig" -v -s "C:\Documents and Settings\All Users\Application Data\AVG2013\*.dat""C:\Program Files\Contig\Contig" -v -s

It will also probably make the defragmentation take longer. Adrian. Resolving file fragmentation As soon as I uncovered the article outlining the changes to Windows disk defragmentation and a bit more digging around, I went to that mainstay of all Windows I imagine this is because some SAN vendors handle fragmentation better than others and that, to an extent, files are by definition fragmented as they are striped across multiple disks in

But after 5 years for same query it will take 5sec while tuples remain same. Re-run the contig.exe check against that data file.