From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Hannu Krosing <hannu(at)tm(dot)ee> |
Cc: | Devik <devik(at)server(dot)cdi(dot)cz>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: pgsql is 75 times faster with my new index scan |
Date: | 2000-10-17 14:28:28 |
Message-ID: | 200010171428.KAA21254@candle.pha.pa.us |
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Lists: | pgsql-hackers |
> Bruce Momjian wrote:
> >
> > > > > I doubt everyone would like trading query speed for insert/update
> > > > > speed plus index size
> > > >
> > > > If he is scanning through the entire index, he could do a sequential
> > > > scan of the table, grab all the tid transaction status values, and use
> > > > those when viewing the index. No need to store/update the transaction
> > > > status in the index that way.
> > >
> > > Huh ? How ? It is how you do it now. Do you expect
> > > load several milion transaction statuses into memory,
> > > then scan index and lookup these values ?
> > > Missed I something ?
> > > devik
> > >
> > >
> >
> > Not sure. I figured they were pretty small values.
>
> IIRC the whole point was to avoid scanning the table ?
Yes, sorry.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
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