On Thu, Oct 23, 2008 at 12:25 AM, Tom Lane <[EMAIL PROTECTED]> wrote:

>  It looks like you are testing a case where the tables all
> fit in memory.  Do you expect that to be the reality for your production
> use?  If so, you might want to reduce random_page_cost to something
> close to 1 to reflect it.  If not, it'd be a good idea to test with more
> realistically-sized tables before deciding what's "faster".
>
I am sure it at least reads some disc, because I can see peak in hd read -
up to about 10-20MB/s during that query's execution.

-- 
GJ

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