How to set init.ora parameter _ksmg_granule_size?

Hi,

MetaLink's solution to my ORA-600: Generic internal error is to  set init.ora parameter _ksmg_granule_size = 16 M. 

I tried to query the table v$parameter to find this particular parameter without success.

SQL> select name, type, value
2 from v$parameter
3 where name like '%ksmg%';

no rows selected

Q1: How do you query the value of an internal parameter?

From http://www.recovery-for-oracle.com/Params/parm527.htm the internal parameter can not be set by 'ALTER SYSTEM' command.

Q2: The proper way to set an internal parameter is to create a pfile from the spfile, modify the pfile,  and restart the database with the pfile.  Is this correct?