Re: Tsearch2 really slower than ilike ?

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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@xxxxxxxxxx, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83


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