Slow performance when upgrading to 11g from 10g

Hi guys, 
 
though I have collected some info on this, I would like to know if there
is some tips that you can share on same, if after upgrading to 11g you
detected slow performance on a database that was ok in 10g (same hw),
and if possible some stories of success.
 
tks,
 

Gabriel 


 

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