Curious bit of synchronicity, related discussion going on in comp.arch on same topic, lurkers like me might appreciate the explanation given in http://groups.google.com/groups?selm=svudnRBY5twrXG6jXTWJkQ%40metrocast.net
pgsql-hackers by date:
Соглашаюсь с условиями обработки персональных данных