However, there is a difference between a comment like:
"I don't know off the top of my head, but you might have better luck on the pgsql-perform
"The pgsql-perform is the right place for these queries. Next time, please review the list
descriptions before deciding where to email your question."
(In fairness to the PostgreSQL folks, their lists are the most helpful I have seen anywhere.)
I have been on lists where there have been quite hostile people who throw personal attacks for
no real reason (OSI's License-Discuss comes to mind). And in general what is missing is an
involved list owner who is willing to take some of the work on shepharding the conversation
(this doesn't mean heavy-handed moderation, just someone who people respect to remind people
when they are outside the bounds of what is beneficial on the list).