row length or node size exceeds size of row cache - check  cache
  attributes

  Explanation:  This is an informational message that is  reported
  when  CREATE  TABLE,  CREATE  INDEX, ALTER TABLE or ALTER DOMAIN
  cause a tables row size or index node to exceed that defined  by
  the logical area row cache of the same name.

  User Action:  The longer rows will no longer fit  in  the  cache
  and  therefore  the  row  cache  might  not  be  effective.  The
  database  administrator  may  need  to  adjust  the  row   cache
  definition  to compensate for this change.  Please note that row
  compression might allow some or all of the longer  rows  to  fit
  within the row cache.