Re: [HACKERS] gsoc, text search selectivity and dllist enhancments

Jan Urbański wrote:

> Oh, one important thing. You need to choose a bucket width for the LC
> algorithm, that is decide after how many elements will you prune your
> data structure. I chose to prune after every twenty tsvectors.

Do you prune after X tsvectors regardless of the numbers of lexemes in
them? I don't think that preserves the algorithm properties; if there's
a bunch of very short tsvectors and then long tsvectors, the pruning
would take place too early for the initial lexemes. I think you should
count lexemes, not tsvectors.

--
Alvaro Herrera

http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

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