Re: pgsql is 75 times faster with my new index scan

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От Bruce Momjian
Тема Re: pgsql is 75 times faster with my new index scan
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Msg-id 200010171205.IAA15969@candle.pha.pa.us
обсуждение исходный текст
Ответ на pgsql is 75 times faster with my new index scan  (devik@cdi.cz)
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> > > 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.

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