you need to modify the fine that you plan to use to startup the database (the changes will take effect only when you shutdown and startup the database)

The only way to know what file was used to startup the database the last time is the method Sambavan mentioned...get the parameter values and compare with each one of the init files (chances are high that it would be initnewsdb.ora )

But you have to understand this that if you (or someone else) plan to startup the database in future using some other init file, you will need to make the changes there as well.

- Rajeev