Please help me

I have to provide a hardware-software configuration based on a PG
database,
capable to support min 500 simultaneous users each one accesing pages
that
send an average 6 queries per page. Minimum display time of any page = 5
second.

I have no precise idea about how such a configuration will be. An
estimate based on intuition: a dual (extensible to quad) processor Intel
computer with 1GB RAM and a min 30GB HDD 7200rpm. But intuition is not
an argument

Thank you in advance and all the best,

Mike

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