Re: limiting hint bit I/O

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От Tom Lane
Тема Re: limiting hint bit I/O
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Msg-id 9040.1295030529@sss.pgh.pa.us
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Ответ на Re: limiting hint bit I/O  ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>)
Ответы Re: limiting hint bit I/O  (Robert Haas <robertmhaas@gmail.com>)
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"Kevin Grittner" <Kevin.Grittner@wicourts.gov> writes:
> Anyway, there are so many ideas in this area, it's hard to keep them
> all straight.  Personally, if I was going to start with something,
> it would probably be to better establish what the impact is on
> various workloads of *eliminating* hint bits.
> I know some people find them useful for forensics to a degree that
> they would prefer not to see this,

Um, yeah, I think you're having a problem keeping all the ideas straight
;-).  The argument about forensics has to do with how soon we're willing
to freeze tuples, ie replace the XID with a constant.  Not about hint
bits.
        regards, tom lane


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