How frequently should an update stats job run

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How frequently should an update stats job run

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Sapen

Posted Friday, September 21, 2012 10:28 AM

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Hi All,

Hope all is well.

Currently I am updating statistics on specific tables (identified them based on modified rows) daily at 2:00AM. Are there any disadvantages if I update stats twice or thrice a day?

Thanks for ur inputs.

Post #1362835

MysteryJimbo

Posted Friday, September 21, 2012 10:42 AM

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How big is the table? How frequently is it changed and what percentage of rows? How frequently is it accessed?

Post #1362845

Lynn Pettis

Posted Friday, September 21, 2012 10:46 AM

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I have seen it where once a week is good enough, but i have also seen it where it needed to be run every two hours to keep the application performance where it needed to be. Really comes down to "it depends."

Please note, where it was being run every two hours, it was on a single, large, volitale table.

Cool

Lynn Pettis

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Post #1362848

opc.three

Posted Sunday, September 23, 2012 11:35 AM

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Sapen (9/21/2012)

Currently I am updating statistics on specific tables (identified them based on modified rows) daily at 2:00AM.

Just curious, are you applying your own algortihm using sys.sysindexes.rowmodctr?

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