Medora,

> Increasing effective_cache_size to 10000 did it.  

That would be 78MB RAM.  If you have more than that available, you can 
increase it further.  Ideally, it should be about 2/3 to 3/4 of available 
RAM.

>The query now
> takes 4 secs.  I left random_page_cost at the default value of 4.  
> I thought, mistakenly apparently, that our database was relatively 
> itty bitty and so haven't messed with the .conf file. 

Actually, for a itty bitty database on a fast machine, you definitely want to 
lower random_page_cost.  It's a large database that would make you cautious 
about this.

-- 
-Josh Berkus
 Aglio Database Solutions
 San Francisco


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