Re: Vacuum, visibility maps and SKIP_PAGES_THRESHOLD

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От Greg Stark
Тема Re: Vacuum, visibility maps and SKIP_PAGES_THRESHOLD
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Msg-id BANLkTi=Vj6jA1ZZrNCmrwH3WYez4Bvy4tg@mail.gmail.com
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Ответ на Re: Vacuum, visibility maps and SKIP_PAGES_THRESHOLD  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
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<p><br /> On Jun 3, 2011 8:38 PM, "Bruce Momjian" <<a href="mailto:bruce@momjian.us">bruce@momjian.us</a>>
wrote:<br/> ><br /> > I realize we just read the pages from the kernel to maintain sequential<br /> > I/O, but
dowe actually read the contents of the page if we know it<br /> > doesn't need vacuuming?  If so, do we need to?<p>I
dontfollow. What's your question?<p>Tom's final version does basically the optimal combination of the above I think.  

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