Re: Tsearch2 really slower than ilike ?

On Tue, 16 Nov 2004, Joshua D. Drake wrote:

>
>>> or more.
>>>
>>
>> Yes site name ... is company names or web site name ... so not many word in
>> each record ... but I don't understand why more words are more efficient
>> than few words ?? sorry ...
>>
> Well there are a couple of reasons but the easiest one is index size.
> An ILIKE btree index is in general going to be much smaller than a gist
> index.
> The smaller the index the faster it is searched.

for single word queries  @@ should have the same performance  as ilike with
index disabled  and better for complex queries.


>
> Sincerely,
>
> Joshua D. Drake
>
>
>
>> Regards,
>>
>
>
>

     Regards,
         Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83