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tooba
Posting Yak Master

224 Posts
Posted - 10/02/2012 :  11:45:36  Show Profile  Reply with Quote
I am trying to Rebuild and Reorganize index on table. Before i Rebuild/Re Organize Total Fragmentation is 66.67%, but after i Rebuild/Re Organize the Percentage doesn't change ( Total Fragmentation is 66.67%). Is any one can help me or guide me why he doesn't change? and anyone have handy script to Rebuild/Re Organize and update statistics on whole table.

2) Other question its a good idea if i run (Rebuild/Re organize index and Update Statistics on Database) every 30minutes or every day?

Thank You.

lazerath
Constraint Violating Yak Guru

USA
343 Posts
Posted - 10/02/2012 :  12:05:52  Show Profile  Reply with Quote
It's a good idea to base reorganize / rebuild operations on fragmentation level. In a 24/7/365 applications, you won't want to run this every 30 minutes as rebuilds can introduce blocking depending on your edition. Ideally, you'll want to stagger the job over non-peak hours as appropriate for your needs.

A quick search found http://ola.hallengren.com as a potential script that will intelligently determine if and when you need to update statistics, rebuild or reorganize. I haven't used it before, so I can't vouch for it, but it should get you on the right track.
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robvolk
Most Valuable Yak

USA
15732 Posts
Posted - 10/02/2012 :  12:38:32  Show Profile  Visit robvolk's Homepage  Reply with Quote
I can definitely vouch for and recommend Ola's index script, it works very well and is very easy to use.
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