Re: Full Text Search - Slow on common words

On Thu, 2010-10-28 at 12:08 -0700, sub3 wrote:
> Hi,
>
> I have a small web page set up to search within my domain based on keywords.
> One of the queries is:
> SELECT page.id ts_rank_cd('{1.0, 1.0, 1.0, 1.0}',contFTI,q) FROM page,
> to_tsquery('steve') as q WHERE contFTI @@ q
>
> My problem is: when someone puts in a commonly seen word, the system slows
> down and takes a while because of the large amount of data being returned
> (retrieved from the table) & processed by the rand_cd function.
>
> How does everyone else handle something like this? I can only think of 2
> possible solutions:
> - change the query to search for the same terms at least twice in the same
> document (can I do that?)
> - limit any searches to x results before ranking & tell the user their
> search criteria is too generic.
>
> Is there a better solution that I am missing?
>

if the keyword is that common, is it really a keyword? Exclude it.