Re: Extremely slow intarray index creation and inserts.

From: Oleg Bartunov
Subject: Re: Extremely slow intarray index creation and inserts.
Date: ,
Msg-id: Pine.LNX.4.64.0903191544500.31919@sn.sai.msu.ru
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In response to: Re: Extremely slow intarray index creation and inserts.  (Oleg Bartunov)
List: pgsql-performance


On Thu, 19 Mar 2009, Oleg Bartunov wrote:

> On Thu, 19 Mar 2009, Tom Lane wrote:
>
>> Oleg Bartunov <> writes:
>>> We usually say about 200 unique values as a limit for
>>> gist_int_ops.
>>
>> That seems awfully small ... should we make gist_intbig_ops the default,
>> or more likely, raise the signature size of both opclasses?  Even at a
>> crossover point of 10000 I'm not sure that many real-world apps would
>> bother considering gist_int_ops.
>
> gist__int_ops doesn't uses signatures, it uses range compression, which
> is not lossy, but not capacious. Perhaps, that's why we decided to use it as

sorry, it's lossy

> default opclass.
>
>
>     Regards,
>         Oleg
> _____________________________________________________________
> Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
> Sternberg Astronomical Institute, Moscow University, Russia
> Internet: , http://www.sai.msu.su/~megera/
> phone: +007(495)939-16-83, +007(495)939-23-83
>
>

     Regards,
         Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: , http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83


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