| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: vacuum does not reclaim rows |
| Date: | 2003-07-21 05:03:42 |
| Message-ID: | 200307210503.h6L53gE00844@candle.pha.pa.us |
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| Thread: | |
| Lists: | pgsql-hackers |
Oh, shared tables --- I forgot about those.
---------------------------------------------------------------------------
Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > This might be a stupid question, but why does one backend have to care
> > about the global xmin at all? Isn't the local xmin the only important
> > value?
>
> Not when it's looking at shared tables.
>
> Do you want to try to make the tqual code aware of whether it's looking
> at a shared or nonshared table? I don't honestly think it's worth it...
>
> regards, tom lane
>
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
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