optimization histograms

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От amit sehas
Тема optimization histograms
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Msg-id 512191.93810.qm@web32201.mail.mud.yahoo.com
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Ответы Re: optimization histograms  ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>)
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HI,

for the histograms for cost based optimization, is there a rule of thumb on how often to rebuild them? They are
obviouslynot being continuously updated...what is the state of the art in this area, do all the other databases also
endup with stale statistics every now and then and have to keep rebuilding the stats?
 

thanks
-Amit

     


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