[Pgbigm-hackers] Add bigm_similarity details to documentation

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Amit Langote amitl****@gmail*****
2013年 11月 22日 (金) 09:28:22 JST


On Friday, November 22, 2013, Fujii Masao wrote:

> On Thu, Nov 21, 2013 at 11:36 PM, Amit Langote <amitl****@gmail*****<javascript:;>>
> wrote:
> >
> >
> > On Thursday, November 21, 2013, Fujii Masao wrote:
> >>
> >> On Thu, Nov 21, 2013 at 12:46 AM, Amit Langote <amitl****@gmail*****<javascript:;>
> >
> >> wrote:
> >> >
> >> >
> >> > On Wednesday, November 20, 2013, Beena Emerson wrote:
> >> >>
> >> >> Hello,
> >> >>
> >> >> The attached patch adds detailed information about bigm_similarity
> >> >> function
> >> >>
> >> >
> >> > About the gin pending stats, is there any relation with FASTUPDATE
> >> > parameter
> >> > worth mentioning like it's being turned on or off?
> >>
> >> Sorry. I could not understand the point. Could you elaborate this?
> >
> >
> > If  FASTUPDATE is turned off would there be a pending list? I am under an
> > impression that there wouldn't be any; is that so?
>
> Yes, GIN index created with FASTUPDATE disabled doesn't have a pending
> list.
> So, in this case, pg_gin_pending_stats' pages and tuples columns always
> return
> 0. This is the same behavior as pgstatginindex() function which is
> provided by
> pgstattuple contrib module.
>
>
Ah, I see. If users would already be aware of such behavior then I guess
it's not necessary to stress FASTUPDATE in documentation.

-- Amit
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