Is Optimizer smart enough?

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От tmorelli@tmorelli.com.br
Тема Is Optimizer smart enough?
Дата
Msg-id 20060110235023.B2CEEF368E@smtpi01.infolink.com.br
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Ответы Re: Is Optimizer smart enough?  (Tom Lane <tgl@sss.pgh.pa.us>)
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Hi,

Just for curiosity: suppose there is an excellent index frequently picked by
the optimizer. Suppose now that this index became extremelly fragmented with
thousands of updates. Without a REINDEX, will Optimizer still pick it? Or the
optimizer is smart enough to detect index fragmentation and discard it?

Is there something that I could do in btcostesimate function to detect
increasing index fragmentation?

best regards,

Eduardo Morelli


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