Hidden initialization parameters

It seemd that the number of hidden parameters is increasing between versions.
a small check reveals that:
  • version 8.1.7.4 contains 300 paramters.

  • version 9.2.0.8 contains 613 paramters.

  • version 10.2.0.3 contains 1179 paramters.

  • Here is the query I used to locate these parameters:
    SELECT
    a.ksppinm "Parameter",
    a.ksppdesc "Description",
    b.ksppstvl "Session Value",
    c.ksppstvl "Instance Value"
    FROM
    x$ksppi a,
    x$ksppcv b,
    x$ksppsv c
    WHERE
    a.indx = b.indx
    AND
    a.indx = c.indx
    AND
    a.ksppinm LIKE '/_%' escape '/';

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