On Thu, 19 Mar 2009, Tom Lane wrote:
> Oleg Bartunov <> writes:
>> We usually say about 200 unique values as a limit for
> 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 default opclass.
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