Slow Full Table Scan on IOT

Hello,

for performance testing I build two tables containing about 1M rows of generated data. One table as an IOT, the other with no special properties.
It showed up that performing a full table scan on the IOT takes about 200 seconds, while the FTS on the 'normal' table finished after about 10 seconds.
(I'm using Oracle 8.0.3 on a Sun Enterprise, Solaris 2.6) Any suggestions to explain this phenomena?

Thanks
  Joerg

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 \_ \ \ \     Joerg Lanzinger, Tankenrainer Str. 33, 82362 Weilheim 
  _\ \ \ \__    EMail: joerg.lanzinger_at_in.tum.de
  \___\ \___\     WWW: http://www.in.tum.de/~lanzinge


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