Full text search - Mailing list pgsql-sql

Hi all.
I'm using Postgres 7.1 to store emails archives. I want to perform a 
full text search in emails' contents. Emails' content can be quite big 
(up to 15000 characters). I've already seen that Regex match function 
'~' is way faster than the classical sql 'LIKE' function.

Is there another tip to make the search faster ? Something like 
automatic indexation of words when insering the text ? Or, I don't know, 
optimization stuff... ?

Any help would be appreciate.

Thanks.

--------------
Jocelyn Callier
callier@vdl2.ca