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Predictable Index Fragmentation


Predictable Index Fragmentation

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SQLBOT
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Comments posted to this topic are about the item Predictable Index Fragmentation

Craig Outcalt



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Jeff Moden
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Nice job, Craig... and great graphics! I'm gonna have to play... Smile

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

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Good article ...Smile



MarkusB
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Very good article.
Maybe I should start re-testing my defragmentation routines.

Markus Bohse
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A "different" topic to write a article on.

"Keep Trying"
John.Sansom
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An excellent article that I really enjoyed reading, so thank you for sharing it with us. I particularly like your clear and logical writing style.

I look forward to reading more of your work.


John Sansom (@sqlBrit) | www.johnsansom.com
Andy Warren
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Looking forward to trying it as well. I've always used the example of updating a uniqueidentier column with all new values from newid() to generate fragmentation and show to use fill factor to offset it, this should be an interesting approach to add to that.

Andy
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SQLBOT
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Andy Warren (10/29/2008)
Looking forward to trying it as well. I've always used the example of updating a uniqueidentier column with all new values from newid() to generate fragmentation and show to use fill factor to offset it, this should be an interesting approach to add to that.


oh, that's clever!

I'll have to see what the graph looks like.


At the end of the day, I think understanding this sort of thing helps design better tables and indexes.
I know I've been thinking about it more and more... especially with ETL jobs which could fragment horribly if you inserted them 'wrong', but fragment relatively little if inserted 'right'.

Craig Outcalt



Tips for new DBAs: http://www.sqlservercentral.com/articles/Career/64632
My other articles: http://www.sqlservercentral.com/Authors/Articles/Craig_Outcalt/560258
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Another article to follow on your maintenance jobs and how the testing went?

Nice article!
Andrew Peterson
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Nice academic approach. No doubt I'll have to look this over a few times for it all to sink in.

The more you are prepared, the less you need it.
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