Re: RE: Plans for solving the VACUUM problem

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От Hannu Krosing
Тема Re: RE: Plans for solving the VACUUM problem
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Msg-id 3B092BD9.258E8E43@tm.ee
обсуждение исходный текст
Ответ на RE: Plans for solving the VACUUM problem  ("Henshall, Stuart - WCP" <SHenshall@westcountrypublications.co.uk>)
Ответы Re: RE: Plans for solving the VACUUM problem  (Bruce Momjian <pgman@candle.pha.pa.us>)
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"Henshall, Stuart - WCP" wrote:
> 
> Apologises if I've missed something, but isn't that the same xmin that ODBC
> uses for row versioning?
> - Stuart
> 
>         <Snip>
> > Currently, the XMIN/XMAX command counters are used only by the current
> > transaction, and they are useless once the transaction finishes and take
> > up 8 bytes on disk.
>         <Snip>

BTW, is there some place where I could read about exact semantics of
sytem fields ?

--------------------
Hannu


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